US2429482A - Method and means for the production of foil material - Google Patents

Method and means for the production of foil material Download PDF

Info

Publication number
US2429482A
US2429482A US471345A US47134543A US2429482A US 2429482 A US2429482 A US 2429482A US 471345 A US471345 A US 471345A US 47134543 A US47134543 A US 47134543A US 2429482 A US2429482 A US 2429482A
Authority
US
United States
Prior art keywords
roller
foil
rollers
film
teeth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US471345A
Inventor
Munters Carl Georg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB17513/42A external-priority patent/GB565370A/en
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2429482A publication Critical patent/US2429482A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411Roller, cylinder or drum types
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/18Thermoforming apparatus
    • B29C51/20Thermoforming apparatus having movable moulds or mould parts
    • B29C51/22Thermoforming apparatus having movable moulds or mould parts rotatable about an axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/18Thermoforming apparatus
    • B29C51/20Thermoforming apparatus having movable moulds or mould parts
    • B29C51/22Thermoforming apparatus having movable moulds or mould parts rotatable about an axis
    • B29C51/225Thermoforming apparatus having movable moulds or mould parts rotatable about an axis mounted on a vacuum drum
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/22Corrugating
    • B29C53/24Corrugating of plates or sheets
    • B29C53/28Corrugating of plates or sheets transverse to direction of feed
    • B29C53/285Corrugating of plates or sheets transverse to direction of feed using rolls or endless bands
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4895Solvent bonding, i.e. the surfaces of the parts to be joined being treated with solvents, swelling or softening agents, without adhesives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/52Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
    • B29C65/526Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive by printing or by transfer from the surfaces of elements carrying the adhesive, e.g. using brushes, pads, rollers, stencils or silk screens
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/002Removing toxic gases
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/20Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • B29C66/438Joining sheets for making hollow-walled, channelled structures or multi-tubular articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/731General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the intensive physical properties of the material of the parts to be joined
    • B29C66/7311Thermal properties
    • B29C66/73111Thermal expansion coefficient
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • B29C66/81811General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83421Roller, cylinder or drum types; Band or belt types; Ball types band or belt types
    • B29C66/83423Roller, cylinder or drum types; Band or belt types; Ball types band or belt types cooperating bands or belts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83511Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31FMECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31FMECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2804Methods
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31FMECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2845Details, e.g. provisions for drying, moistening, pressing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31FMECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2845Details, e.g. provisions for drying, moistening, pressing
    • B31F1/2854Means for keeping the sheet in contact with one of the corrugating rollers after corrugating, but before applying the facer sheet, e.g. by air pressure, suction or pressing fingers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112Single lapped joints
    • B29C66/1122Single lap to lap joints, i.e. overlap joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/731General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the intensive physical properties of the material of the parts to be joined
    • B29C66/7311Thermal properties
    • B29C66/73111Thermal expansion coefficient
    • B29C66/73112Thermal expansion coefficient of different thermal expansion coefficient, i.e. the thermal expansion coefficient of one of the parts to be joined being different from the thermal expansion coefficient of the other part
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2024/00Articles with hollow walls
    • B29L2024/003Articles with hollow walls comprising corrugated cores
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10Methods of surface bonding and/or assembly therefor
    • Y10T156/1002Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1007Running or continuous length work
    • Y10T156/1016Transverse corrugating
    • Y10T156/1021Treating material of corrugated lamina or dry adhesive thereon to render tacky

Definitions

  • My invention relates to sheet material for instance such as is used for packages. Furthermore, the invention relates to sheets which consist of an artificial mass which softens when heated and which preferably is transparent.
  • the sheets are provided with corrugations, bulges or the like, and two or more sheets may be united with each other at the tops of these corrugations or bulges in a manner such that a composite board or wall is obtained which is comparatively 2 I of steam which is conducted in a known manner through the interior of the rollers. It is preferable to preheat the film 28, prior to its entrance between the rollers 28, 29, to a temperature corresponding, approximately at least, to the temperature of these rollers. Such preheating may rigid or resistive against bending in one direction at least.
  • the sheets may be folded in the cold state in a suitable machine so as to produce more or less sharp edges.
  • this method is not suitable, particularly for packages composed of transparent sheets, for the reason that the sheets are apt to break on account oftheir relative brittleness, which impairs their strength and appearance in the finished packaging material.
  • the corrugations are not of uniform shape when made in this way which, inter alia, also impair the strength of the package.
  • this method is limited to constructions with sharp rectilinear pleats over the surface of the sheet, and consequently, for instance, it is not possible to impart a softly rounded shape to the pleats.
  • Fig. 1 shows a machine more or less diagrammatically and partly in section, for the production of sheets according to the invention.
  • Fig. 2 shows a modified machine partly in section in accordance with the invention.
  • Fig. 3 is a sectional view on the line IH-III of Fig. 2.
  • Fig. l 25 denotes a rotatably mounted roller having a roll of transparent material, such as acetyl cellulose, wound thereon. From this roll, the film 26 is conveyed, if desired over a guide roller 21, in between two rollers 28, 29, the ex-- ternal surfaces of which are formed with a profile corresponding to the desired shape of the films.
  • the rollers are provided with axially extending tooth-like projections engaging one another, as will be seen from the figure.
  • the rollers 28, 29 are heated to a suitable temperature, for instance with the aidbe effected with the aid of one or more preheating rollers, or by means of hot air, and the web may be heat-insulated, as at 50.
  • the film 28 is corrugated during its passage through the teeth meshing with each other. By reason of the heatingprocedure the film has become soft and plastic.
  • the film remains in the teeth of the roller 29 during its continued rotation and passes between this roller and another roller 30, provided with teeth in mesh with the teeth of the roller 29.
  • Devices known per se are preferably made use of to loosen the film from the roller-28 and to keep the same in the teeth of the roller 28.
  • the roller 30 need not press against the roller 29, a certain play being preferably provided between the teeth thereof.
  • the roller 30 is driven by means of a synchronizing gear, so that contact between the roller teeth and iamming of the film will not occur.
  • the film can thus conveniently move laterally under the change in temperature occurring by the fact that the roller 30 is comparatively cold or cooled and of such a temperature that the film becomes set and rigid so as to retain the corrugated shape thereof.
  • a device for applying adhesive or solvent, such as acetone, on the ridges of the corrugated film is represented diagrammatically by a receptacle 3
  • the roller 32 may be adapted to be thrown out of engagement automatically, when the machine is stopped, to prevent the film from being dissolved by the acetone and from sticking to the roller 30.
  • a rotatably mounted roller 33 carries another roll of film, preferably of the same transparent material as the film 26. From this roll, a web 34 is conveyed over a roller 35 having a cylindrical external surface, said latter roller being pressed against the roller 30 for instance by means of springs or the like. The corrugated film 26 and the plane film 34 are secured to each other during their passage between the rollers 30 and 85.
  • the two united films may now be removed transparent material as that of the films 26,-
  • the free ridges of the corrugated film 36 are moistened with solvent or adhesive substance such as acetone, the web 40 being secured to these ridges between the rollers 31, 38.
  • An enless belt 42 may be provided between the roller 31 and a roller 4
  • a belt 43 extends between the roller 38 and a roller 44.
  • the portions of the belts 42, 43 facing one another may be adapted to cooperate with supporting rollers 45 to keep the belts properly spaced from one another so as to cause the belts to press on the sheet.
  • the sheet is dried between the belts, if desired with the aid of a fan producing an air current between the films.
  • the sheet may be heated during its passage between the belts 42, 43, for instance by means of hot air.
  • a suction pump 41 may communicate with the casing 46 through a conduit 48. The pump 41 sucks out the air containing the solvent, to a receptacle 49 containing a suitable absorbing agent, such as silica gel.
  • the preheating of the film 26 prior to its entering between the rollers 28, 29 is of importance to bring about a uniform and smooth surface, it being found that the material according to the invention most frequently has, as compared with paper, for example, a very great coefficient of heat expansion, which results in creasing or buckling of the films if they are warmed while being jammed between the rollers when being corrugated. During th heating proper, the film thus is permitted to expand freely. In order also to avoid tensions in the films, during the interconnection of the same, by reason of the high coefficient of expansion of the material, it is of great importance that the two films 26, 34 have substantially the same temperature.
  • the temperature of the other may be chosen higher in a manner such that, after the solvent has evaporated and both films are cooled down to room temperature tensions in the films, that may cause creases and the like, are eliminated.
  • a further important property according to the invention is, as will appear from the above, that the temperature be selected so that the occurrence of unfavorable tensions in the finished product is avoided as far as possible.
  • the attaching of the transparent films to each other takes place continuously. After the sheet composed of three films has passed between the belts 42 and 43, it may be cut, for instance, into suitable lengths.
  • the invention also includes a construction, wherein the finished sheet only consists of one plane and one corrugated film, as indicated at 36. A sheet composed in this manner may be wound onto rollers without difiiculty.
  • rollers 28 and 29 may be suitable, for instance in order to permit a lateral expansion of the film, to arrange the rollers 28 and 29 relatively to each othe in a manner similar. to the arrangement of the rollers 29, 30, as described hereinbefore.
  • H0 is the frame of the machine, which carries a roller III provided with an outer profile II2 corresponding to the desired shape of the foils.
  • the roller III is formed with axially extending teeth.
  • the roller III is rotatably mounted in bearings III rigidly connected with the frame llll.
  • Fitted into an internal bore in the roller with a small clearance therein is a stationary shaft II4 which is rigidly connected to the frame.
  • the cylindrical external surface of the stationary shaft H4 is cutaway over a portion of the periphery of the surface to form a recess I I5 having an axial length corresponding to the length of the teeth I I2.
  • the recess II5 communicates through a passage II.
  • a recess H8 is arranged adjacent to said recess H5 while being separated therefrom, and may either communicate with the atmosphere or be supplied with air under pressure from a source of pressure through an axial channel 9 in the shaft H4 and a conduit I20.
  • the shaft I I4 has an inner recessi 2 I, which is adapted to be traversedby a heating medium, such as steam, oil or the like, which is introduced through a passage I22 and a pipe I23 extending over the major portion of the length of the recess Hi.
  • the steam escapes through a channel I24, which is located in the same end of the shaft as the passage I22.
  • the roller I I I is provided with radial passages I25 extending therethrough, said passages opening at the bottom of the teeth II2.
  • the shaft I21 is provided with an internal recess I28, to which is supplied a heating medium through a pipe I29 similar to the pipe I23. Furthermore, the shaft I21 is preferably formed with an outer recess I30 which may communicate with the atmosphere, or which may have air under pressure supplied thereto.
  • the outer peripheral portion ofthe roller I26 carries teeth adapted to engage the teeth H2 of the roller III. Radial passages I25 extend from the inside of the roller to the bottom of the teeth thereof.
  • a third roller I3I is formed with teeth engaging the teeth of the roller III.
  • the roller I3I is provided with an inner bore having a stationary shaft I32 fitted into the same.
  • the shaft I32 is provided with a recess I33 extending from the surface thereof, sald recess communicating with a vacuum source through a passage I3I.
  • the roller I3I is provided with an inner recess I35 traversed by a cooling agent, such as water, which may be introduced through a pipe conduit I36 of the same shape as that of the conduit I23..
  • a groove or channel I 37 in the surface of the shaft I32, said. groove or channel communicating with the atmosphere or with a source of compressed air.
  • the roller I3I is provided, similar to the other rollers, with radially extending passages I25.
  • roller I3I Bearing on the roller I3I is a roller I38 having a smooth cylindrical outer surface. If desired, special means may be provided to bring about or to control a suitable pressure between the rollers WI and I38.
  • I39 designates a receptacle for a solvent such as acetone. Dipping into this solvent is a roller Iifl or the like, while another roller III bears on said roller as well as on the ridges of the foil web engaging the roller I3I.
  • the rollers Md and IIII are rotatable, so that solvent will be conveyed by means of the same to the ridges or undulation crests of the foils. If
  • rollers Hit and MI may be enclosed -within a casing I52.
  • the recess H5 in the shaft II extends in a peripheral direction between or substantially between the points of engagement of the roller III with the rollers I23 and I3I.
  • the partition separating the recesses II5 and H8 is located right opposite the point of tooth engagement between the rollers II I and ISI or somewhat in advance of said point.
  • the recess I33 inthc shaft I32 extends between the points of engagement or contact between the roller I3I and the rollers I I I and I33.
  • a web N3 of acetyl cellulose for example, is conveyed from a roll through a space bounded by walls I48 adapted to supply heat to the web so as to preheat the same.
  • the web may slide on the one wall of the space so as to increase the heat transmission.
  • the web then passes between two rollers Ills provided with heating devices, the latter rollers also ensuring that the web is maintained altogether uniform and smooth. After that the web is led in between the teeth of the rollers III and I26 so as to be corrugated thereby.
  • the web is then maintained in the teeth of the roller III, which is ensured according to the invention by the fact that the surface of the web facing the roller is held by suction to these teeth by means oi the partial vacuum existing within recess H5 and communicated through the passages I25 to the web.
  • air under pressure may be-introduced through the recess I30, said air causing a pressure on the web through the passages I25 in a direction from the roller I28.
  • the pressure below atmospheric retaining the web to the roller II I ceases.
  • the web is instead subjected to a sucking effect from the passages I25 in the roller I3I communicating with the recess I33 of the shaft I32, which results in release of the web from its engagement with the teeth of the roller III, and is transferred onto the teeth of the roller I3I.
  • the compressed air escaping through the passages I25 located opposite the recess IIB facilitates the release of the'web from the teeth of the roller III
  • a plate I 45 may be provided, if desired, between and over the sides of the rollers III and I3I, so that the compressed air escaping from the recess H8 is urged against the weblying on the roller I3I.
  • the plate I45 may be provided with one or more apertures connected to a source of compressed air.
  • the web is cooled down by the roller -I3l and will maintain its form.
  • the rollers I40, III moisten the .undulation crests with" solvent. Therefore, when a second web I46 is introduced between the smooth roller I38 and the roller I3I, the two webs will be pasted together so that a composite sheet is obtained, as indicated at 61 in Fig. 2.
  • the method of continuously forming a foil of thermoplasticmaterial having a multiplicity of projections and depressions which includes feeding a sheet of such foil through a heating zone to soften it while permitting thermal expansion of the heated material, forming the desired projections and depressions in the softened foil by applying pressure to the opposite sides of the foil, carrying the formed foil in its softened state from the forming station on a heated supporting surface to prevent deformation of the foil, stripping the foil from said heated surface and transferring it to a chilling surface providing support for and permitting relatively free contraction of the formed foil, and carrying the foil on said chilling surface to cool and set the foil in its formed state.
  • thermoplastic material comprising a foil having a multiplicity of projections and depressions and having a backing sheet which includes feeding a sheet of such foil through a. heating zone to soften it while permitting thermal expansion of the heated material, forming the desired projections and depressions in the softened foil by applying pressureto the opposite sides of the foil,
  • thermoplastic material having a multiplicity of projections and depressions and a backing sheet which includes feeding a sheet of such foil through a heating zone to soften it while permitting thermal expansion of the heated material, forming the desired projections and depressions in the softened foil by applying pressure to the opposite sides of the foil, carrying the formed foil in its softened state from the forming station on a heated supporting surface to prevent deformation of the foil, stripping the foil from said heated surface and transferring it to a chilling surface providing support for and permitting relatively free contraction of the formed foil, carrying the foil on said chilling surface to cool and set the foil in its formed state, applying a solvent to the crests of the projections of the foil and pressing a backing sheet of thermoplastic material at approximately the same temperature as that of the foil to the solvent treated crests.
  • a heating de'ice for softening a moving foil of thermoplastic material while providing for thermal expansion of the foil
  • a first and a second forming roller provided with intermeshing projections and depressions, means for heating said rollers, means for passing the softened foil between said rollers to form it, means for maintaining the film hot between said heating means and where it passes between said heated rollers, means for stripping the formed foil from the first roller and carrying it in its softened state on the surface of said second roller away from the forming station, a chilling roller having projections and depressions meshing with said second roller and engaging said foil at a place spaced from said forming station to effect a preliminary setting of the softened foil while it is supported by said second roller and means for stripping the foil from said second roller and carrying it in its formed state on the surface of said chilling roller to further cool and set the foil.
  • a heating device for softening a moving foil of thermoplastic material while providing for thermal expansion of the foil first and second forming rollers provided with intermeshing projections and depressions, passageways between said depressions and the interior of said rolls, means for introducing air under pressure into the passageways in said first roll to strip the formed foil therefrom, means to introduce a vacuum in the passageways of said second roll over a portion of the circumference thereof to hold the foil on said second roll, means associated with said second roll to introduce air under pressure into said passageways to strip the foil therefrom at a predetermined position in the rotation thereof, a chilling roller having projections and depressions meshing with said second roller and engaging said foil to effect a preliminary setting of the softened foil while it is supported by said second roller, passageways formed in said second roller between said depressions and the interior thereof, means for introducing a vacuum into said passageway in said chilling roll to retain the foil thereon during a portion of one rotation thereof and means for introducing air under pressure into said passageways at a predetermined rate

Description

Oct. 21, 1947. c. s. MUNTERS METHOD AND MEANS FOR THE PRODUCTION OF FOIL MATERIAL Filed Jan. 5, 1943 2 Sheets-Sheet 1 Fig.1
HYYENTV'R A W Wv METHOD AND MEANS FOR THE PRODUCTION OF FOIL MATERIAL Q M *w Patented Oct. 21, 1947 METHOD AND MEANS FOR THE PRODUC- TION OF FOIL MATERIAL Carl Georg Munters, Stocksund, Sweden Application January 5, 1943, Serial No. 471,345
In Sweden April 6, 1939 6 Claims. 1
My invention relates to sheet material for instance such as is used for packages. Furthermore, the invention relates to sheets which consist of an artificial mass which softens when heated and which preferably is transparent. The sheets are provided with corrugations, bulges or the like, and two or more sheets may be united with each other at the tops of these corrugations or bulges in a manner such that a composite board or wall is obtained which is comparatively 2 I of steam which is conducted in a known manner through the interior of the rollers. It is preferable to preheat the film 28, prior to its entrance between the rollers 28, 29, to a temperature corresponding, approximately at least, to the temperature of these rollers. Such preheating may rigid or resistive against bending in one direction at least.
To provide such corrugations, the sheets may be folded in the cold state in a suitable machine so as to produce more or less sharp edges. However, this method is not suitable, particularly for packages composed of transparent sheets, for the reason that the sheets are apt to break on account oftheir relative brittleness, which impairs their strength and appearance in the finished packaging material. Moreover, the corrugations are not of uniform shape when made in this way which, inter alia, also impair the strength of the package. In addition, this method is limited to constructions with sharp rectilinear pleats over the surface of the sheet, and consequently, for instance, it is not possible to impart a softly rounded shape to the pleats.
It is the object of the invention to overcome these difficulties and to attain a continuous and economic production of the sheet material.
Further objects and advantages of the invention will be apparent from the following description considered in connection with the accompanying drawings which form a part of this specification, and of which:
Fig. 1 shows a machine more or less diagrammatically and partly in section, for the production of sheets according to the invention.
Fig. 2 shows a modified machine partly in section in accordance with the invention.
Fig. 3 is a sectional view on the line IH-III of Fig. 2.
In Fig. l, 25 denotes a rotatably mounted roller having a roll of transparent material, such as acetyl cellulose, wound thereon. From this roll, the film 26 is conveyed, if desired over a guide roller 21, in between two rollers 28, 29, the ex-- ternal surfaces of which are formed with a profile corresponding to the desired shape of the films. In the present case, the rollers are provided with axially extending tooth-like projections engaging one another, as will be seen from the figure. The rollers 28, 29 are heated to a suitable temperature, for instance with the aidbe effected with the aid of one or more preheating rollers, or by means of hot air, and the web may be heat-insulated, as at 50. The film 28 is corrugated during its passage through the teeth meshing with each other. By reason of the heatingprocedure the film has become soft and plastic. The film remains in the teeth of the roller 29 during its continued rotation and passes between this roller and another roller 30, provided with teeth in mesh with the teeth of the roller 29. Devices known per se are preferably made use of to loosen the film from the roller-28 and to keep the same in the teeth of the roller 28. The roller 30 need not press against the roller 29, a certain play being preferably provided between the teeth thereof. Preferably, the roller 30 is driven by means of a synchronizing gear, so that contact between the roller teeth and iamming of the film will not occur. The film can thus conveniently move laterally under the change in temperature occurring by the fact that the roller 30 is comparatively cold or cooled and of such a temperature that the film becomes set and rigid so as to retain the corrugated shape thereof.
Arranged beside the roller 30 is a device for applying adhesive or solvent, such as acetone, on the ridges of the corrugated film. In Fig. 1, this device is representated diagrammatically bya receptacle 3|, containing the adhesive or solvent, and a rotatable roller or the like 32, which dips down into the receptacle H with the lower portion thereof and makes contact with the film car ried by the roller 30. If desired, the roller 32 may be adapted to be thrown out of engagement automatically, when the machine is stopped, to prevent the film from being dissolved by the acetone and from sticking to the roller 30.
. A rotatably mounted roller 33 carries another roll of film, preferably of the same transparent material as the film 26. From this roll, a web 34 is conveyed over a roller 35 having a cylindrical external surface, said latter roller being pressed against the roller 30 for instance by means of springs or the like. The corrugated film 26 and the plane film 34 are secured to each other during their passage between the rollers 30 and 85.
The two united films may now be removed transparent material as that of the films 26,-
from which a web 40 is conveyed over the roller 38. By means of a device 3|, 32 of the type above described, the free ridges of the corrugated film 36 are moistened with solvent or adhesive substance such as acetone, the web 40 being secured to these ridges between the rollers 31, 38. An enless belt 42 may be provided between the roller 31 and a roller 4|. In the same manner, a belt 43 extends between the roller 38 and a roller 44. The portions of the belts 42, 43 facing one another may be adapted to cooperate with supporting rollers 45 to keep the belts properly spaced from one another so as to cause the belts to press on the sheet. During the passage of the sheet between the belts 42, 43 the attaching of the films to each other is ensured. The sheet is dried between the belts, if desired with the aid of a fan producing an air current between the films. For the same purpose, the sheet may be heated during its passage between the belts 42, 43, for instance by means of hot air.
Those portions of the webs where the solvent is applied, may be surrounded by casings 5i and 46, respectively, to prevent said substance from escaping freely into the surrounding atmosphere. A suction pump 41 may communicate with the casing 46 through a conduit 48. The pump 41 sucks out the air containing the solvent, to a receptacle 49 containing a suitable absorbing agent, such as silica gel.
The preheating of the film 26 prior to its entering between the rollers 28, 29 is of importance to bring about a uniform and smooth surface, it being found that the material according to the invention most frequently has, as compared with paper, for example, a very great coefficient of heat expansion, which results in creasing or buckling of the films if they are warmed while being jammed between the rollers when being corrugated. During th heating proper, the film thus is permitted to expand freely. In order also to avoid tensions in the films, during the interconnection of the same, by reason of the high coefficient of expansion of the material, it is of great importance that the two films 26, 34 have substantially the same temperature. On the other hand, should'the films have different temperatures, the cooling of the warm film will cause a contraction of the same, which results in creasing or buckling of the cold film. Many advantages are gained by the fact that the rollers 30 and 35, respectively, and the films are relatively cold. Thus solvents, such as acetone, having a boiling point lower than the temperature required for the deformation of the films, may be used to advantage, without the substance in consideration boiling off. By reason of the fact that the rollers 30, 35 and the films bearing thereon are cold or at room temperature, it will be possible even to unite films of materials of different coefllcients of expansion Without disadvantage. If the solvent causes a temporary expansion of the one film, the temperature of the other may be chosen higher in a manner such that, after the solvent has evaporated and both films are cooled down to room temperature tensions in the films, that may cause creases and the like, are eliminated. A further important property according to the invention is, as will appear from the above, that the temperature be selected so that the occurrence of unfavorable tensions in the finished product is avoided as far as possible.
With respect to the appearance of the films, it is of importance that the acetone or the solvent or adhesive substance be applied to th tops of th corrugations.
In the apparatus above described, the attaching of the transparent films to each other takes place continuously. After the sheet composed of three films has passed between the belts 42 and 43, it may be cut, for instance, into suitable lengths. The invention also includes a construction, wherein the finished sheet only consists of one plane and one corrugated film, as indicated at 36. A sheet composed in this manner may be wound onto rollers without difiiculty.
Furthermore, it is obviously conceivable to secure more than three films to each other, for instance in such a manner that alternate films are plane and intermediate ones are corrugated. As a material for the films, so-called secondary acetyl cellulose will be found particularly suitable, permitting of being shaped at 90-130 degrees Centigrade. In place of acetone or methyl ketone, which boils at 56 to 58 degrees centigrade, methyl-ethylen ketone may be employed. As a further exampl of solvents may be mentioned methyl glycol acetate with a boiling point of 138-152 degrees centigrade, which is particularly serviceable when pasting is effected in a warm state. So-called primary acetyl cellulose may also be used in certain cases. Examples of such acetyl cellulose are viscos and Cellophane.
In certain cases, it may be suitable, for instance in order to permit a lateral expansion of the film, to arrange the rollers 28 and 29 relatively to each othe in a manner similar. to the arrangement of the rollers 29, 30, as described hereinbefore.
In Figs. 2 and 3, H0 is the frame of the machine, which carries a roller III provided with an outer profile II2 corresponding to the desired shape of the foils. In the present case, the roller III is formed with axially extending teeth. The roller III is rotatably mounted in bearings III rigidly connected with the frame llll. Fitted into an internal bore in the roller with a small clearance therein is a stationary shaft II4 which is rigidly connected to the frame. The cylindrical external surface of the stationary shaft H4 is cutaway over a portion of the periphery of the surface to form a recess I I5 having an axial length corresponding to the length of the teeth I I2. The recess II5 communicates through a passage II. and a pipe I II with a vacuum pump (not shown). A recess H8 is arranged adjacent to said recess H5 while being separated therefrom, and may either communicate with the atmosphere or be supplied with air under pressure from a source of pressure through an axial channel 9 in the shaft H4 and a conduit I20. Furthermore, the shaft I I4 has an inner recessi 2 I, which is adapted to be traversedby a heating medium, such as steam, oil or the like, which is introduced through a passage I22 and a pipe I23 extending over the major portion of the length of the recess Hi. The steam escapes through a channel I24, which is located in the same end of the shaft as the passage I22. The roller I I I is provided with radial passages I25 extending therethrough, said passages opening at the bottom of the teeth II2. As
will appear from the figures, these passages may be arranged in staggered relation to each other.
and in which is provided a stationary shaft I2i with a small clearance. The shaft I21" is provided with an internal recess I28, to which is supplied a heating medium through a pipe I29 similar to the pipe I23. Furthermore, the shaft I21 is preferably formed with an outer recess I30 which may communicate with the atmosphere, or which may have air under pressure supplied thereto. The outer peripheral portion ofthe roller I26 carries teeth adapted to engage the teeth H2 of the roller III. Radial passages I25 extend from the inside of the roller to the bottom of the teeth thereof.
A third roller I3I is formed with teeth engaging the teeth of the roller III. The roller I3I is provided with an inner bore having a stationary shaft I32 fitted into the same. The shaft I32 is provided with a recess I33 extending from the surface thereof, sald recess communicating with a vacuum source through a passage I3I. Furthermore, the roller I3I is provided with an inner recess I35 traversed by a cooling agent, such as water, which may be introduced through a pipe conduit I36 of the same shape as that of the conduit I23.. Immediately adjacent to' the recess I83 but separated therefrom, there is provided a groove or channel I 37 in the surface of the shaft I32, said. groove or channel communicating with the atmosphere or with a source of compressed air. The roller I3I is provided, similar to the other rollers, with radially extending passages I25.
Bearing on the roller I3I is a roller I38 having a smooth cylindrical outer surface. If desired, special means may be provided to bring about or to control a suitable pressure between the rollers WI and I38. In Fig. 2, I39 designates a receptacle for a solvent such as acetone. Dipping into this solvent is a roller Iifl or the like, while another roller III bears on said roller as well as on the ridges of the foil web engaging the roller I3I. The rollers Md and IIII are rotatable, so that solvent will be conveyed by means of the same to the ridges or undulation crests of the foils. If
desired, the rollers Hit and MI may be enclosed -within a casing I52.
The recess H5 in the shaft II extends in a peripheral direction between or substantially between the points of engagement of the roller III with the rollers I23 and I3I. The partition separating the recesses II5 and H8 is located right opposite the point of tooth engagement between the rollers II I and ISI or somewhat in advance of said point. The recess I33 inthc shaft I32 extends between the points of engagement or contact between the roller I3I and the rollers I I I and I33.
A web N3 of acetyl cellulose, for example, is conveyed from a roll through a space bounded by walls I48 adapted to supply heat to the web so as to preheat the same. The web may slide on the one wall of the space so as to increase the heat transmission. The web then passes between two rollers Ills provided with heating devices, the latter rollers also ensuring that the web is maintained altogether uniform and smooth. After that the web is led in between the teeth of the rollers III and I26 so as to be corrugated thereby. The webis then maintained in the teeth of the roller III, which is ensured according to the invention by the fact that the surface of the web facing the roller is held by suction to these teeth by means oi the partial vacuum existing within recess H5 and communicated through the passages I25 to the web. To facilitate the removal of the web from the engagement with the teeth of the roller I28. air under pressure may be-introduced through the recess I30, said air causing a pressure on the web through the passages I25 in a direction from the roller I28. When the web reaches the point of engagement between the rollers III and I 3|, the communication is interrupted between the corresponding passages I25 and the recess -I I5. At the same time, the pressure below atmospheric retaining the web to the roller II I ceases. The web is instead subjected to a sucking effect from the passages I25 in the roller I3I communicating with the recess I33 of the shaft I32, which results in release of the web from its engagement with the teeth of the roller III, and is transferred onto the teeth of the roller I3I. In the embodiment according to Figs. 2 and 3, the compressed air escaping through the passages I25 located opposite the recess IIB facilitates the release of the'web from the teeth of the roller III,
and at the same time presses it against the teeth of the roller I3I. To increase this pressing effect, a plate I 45 may be provided, if desired, between and over the sides of the rollers III and I3I, so that the compressed air escaping from the recess H8 is urged against the weblying on the roller I3I. If desired, the plate I45 may be provided with one or more apertures connected to a source of compressed air.
The web is cooled down by the roller -I3l and will maintain its form. The rollers I40, III moisten the .undulation crests with" solvent. Therefore, when a second web I46 is introduced between the smooth roller I38 and the roller I3I, the two webs will be pasted together so that a composite sheet is obtained, as indicated at 61 in Fig. 2.
While several embodiments of the invention have been shown, it is to be understood that these are for purpose of illustration only, and that the invention is not to be limited thereby, but its scope is to be determined by the appended claims.
What I claim is:
l. The method of continuously forming a foil of thermoplasticmaterial having a multiplicity of projections and depressions which includes feeding a sheet of such foil through a heating zone to soften it while permitting thermal expansion of the heated material, forming the desired projections and depressions in the softened foil by applying pressure to the opposite sides of the foil, carrying the formed foil in its softened state from the forming station on a heated supporting surface to prevent deformation of the foil, stripping the foil from said heated surface and transferring it to a chilling surface providing support for and permitting relatively free contraction of the formed foil, and carrying the foil on said chilling surface to cool and set the foil in its formed state.
2. The method of continuously forming thermoplastic material comprising a foil having a multiplicity of projections and depressions and having a backing sheet which includes feeding a sheet of such foil through a. heating zone to soften it while permitting thermal expansion of the heated material, forming the desired projections and depressions in the softened foil by applying pressureto the opposite sides of the foil,
carrying the formed foil in its softened state from the forming station on a heated supporting surface '0 prevent deformation of the foil, stripping t e foil from said heated surface and transferring it to a chilling surface providing support for and permitting relatively free contraction of the formed foil, carrying the foil on said chilling surface to cool and set the foil in its formed state, and attaching to:the crests of the projections n the formed foil a backing sheet of thermoplastic material at approximately the same temperature as that of the formed foil.
3. The method of continuously forming thermoplastic material having a multiplicity of projections and depressions and a backing sheet which includes feeding a sheet of such foil through a heating zone to soften it while permitting thermal expansion of the heated material, forming the desired projections and depressions in the softened foil by applying pressure to the opposite sides of the foil, carrying the formed foil in its softened state from the forming station on a heated supporting surface to prevent deformation of the foil, stripping the foil from said heated surface and transferring it to a chilling surface providing support for and permitting relatively free contraction of the formed foil, carrying the foil on said chilling surface to cool and set the foil in its formed state, applying a solvent to the crests of the projections of the foil and pressing a backing sheet of thermoplastic material at approximately the same temperature as that of the foil to the solvent treated crests.
4. The method of continuously forming a foil of thermoplastic material having a multiplicity of projections and depressions which includes feeding a sheet of such foil through a heating zone to soften it while permitting thermal expansion of the heated material, maintaining the film hot up to the time it comes in contact with the first forming roller, forming the desired projections and depressions in the softened foil by applying pressure to the opposite sides of the foil, carrying the formed foil in its softened state from the forming station on a heated supporting surface to prevent deformation of the foil, stripping the foil from said heated surface and transferring it to a chilling surface providing support for and permitting relatively free contraction of the formed foil, and carrying the foil on said chilling surface to cool and set the foil in its formed state. 7
5. In apparatus of the character described, a heating de'ice for softening a moving foil of thermoplastic material while providing for thermal expansion of the foil, a first and a second forming roller provided with intermeshing projections and depressions, means for heating said rollers, means for passing the softened foil between said rollers to form it, means for maintaining the film hot between said heating means and where it passes between said heated rollers, means for stripping the formed foil from the first roller and carrying it in its softened state on the surface of said second roller away from the forming station, a chilling roller having projections and depressions meshing with said second roller and engaging said foil at a place spaced from said forming station to effect a preliminary setting of the softened foil while it is supported by said second roller and means for stripping the foil from said second roller and carrying it in its formed state on the surface of said chilling roller to further cool and set the foil.
6. In apparatus of the character described a heating device for softening a moving foil of thermoplastic material while providing for thermal expansion of the foil, first and second forming rollers provided with intermeshing projections and depressions, passageways between said depressions and the interior of said rolls, means for introducing air under pressure into the passageways in said first roll to strip the formed foil therefrom, means to introduce a vacuum in the passageways of said second roll over a portion of the circumference thereof to hold the foil on said second roll, means associated with said second roll to introduce air under pressure into said passageways to strip the foil therefrom at a predetermined position in the rotation thereof, a chilling roller having projections and depressions meshing with said second roller and engaging said foil to effect a preliminary setting of the softened foil while it is supported by said second roller, passageways formed in said second roller between said depressions and the interior thereof, means for introducing a vacuum into said passageway in said chilling roll to retain the foil thereon during a portion of one rotation thereof and means for introducing air under pressure into said passageways at a predetermined rate in the rotation of said chilling roller to strip the foil therefrom.
CARL GEORG MUNTERS.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 1,981,338 Swift, J1 NOV. 20, 1934 657,100 Ferres Sept. 4, 1900 1,146,771 Raflel July 13, 1915 1,473,096 H111 et al. NOV. 6, 1923 1,264,506 Hahn Apr. 30, 1918 2,018,240 Swift, Jr. Oct. 22, 1935 1,595,346 Long et al A118. 10, 1926
US471345A 1939-04-06 1943-01-05 Method and means for the production of foil material Expired - Lifetime US2429482A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE2429482X 1939-04-06
GB17513/42A GB565370A (en) 1942-12-09 1942-12-09 Improvements in or relating to the production of corrugated thermoplastic sheet material
DEM3873D DE882911C (en) 1939-04-06 1943-01-21 Method and device for the production of folded film material, in particular for packaging purposes

Publications (1)

Publication Number Publication Date
US2429482A true US2429482A (en) 1947-10-21

Family

ID=27211513

Family Applications (1)

Application Number Title Priority Date Filing Date
US471345A Expired - Lifetime US2429482A (en) 1939-04-06 1943-01-05 Method and means for the production of foil material

Country Status (2)

Country Link
US (1) US2429482A (en)
DE (1) DE882911C (en)

Cited By (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2719566A (en) * 1951-12-12 1955-10-04 Associated Packaging Company Method of and machine for making a transparent corrugated board
DE952662C (en) * 1947-10-31 1956-11-22 Dow Chemical Co Process and device for the continuous cooling and molding of organic, thermoplastic plastics
US2862542A (en) * 1955-08-24 1958-12-02 Gen Motors Corp Apparatus and method for corrugating resin-impregnated sheet material
US2996609A (en) * 1958-07-07 1961-08-15 Wilson Bertram Arnold Sheet panel
US3026231A (en) * 1957-12-23 1962-03-20 Sealed Air Corp Method of making an embossed laminated structure
US3033734A (en) * 1959-08-27 1962-05-08 Gen Electric Honeycomb structures
US3123838A (en) * 1964-03-10 Ventilated seat cushion
US3142599A (en) * 1959-11-27 1964-07-28 Sealed Air Corp Method for making laminated cushioning material
US3208898A (en) * 1960-03-09 1965-09-28 Sealed Air Corp Apparatus for embossing and laminating materials
US3217425A (en) * 1962-09-25 1965-11-16 West Virginia Pulp & Paper Co Corrugator
US3226458A (en) * 1960-12-30 1965-12-28 Detag Method and apparatus for continuously producing molded articles and sectional sheets of plastics
US3317363A (en) * 1963-11-29 1967-05-02 Haveg Industries Inc Corrugated product
US3419937A (en) * 1965-08-13 1969-01-07 Corning Glass Works Filter and method and apparatus for its production
US3516889A (en) * 1965-10-20 1970-06-23 Diamond Crystal Salt Co Apparatus for making fluted packages
FR2221257A1 (en) * 1973-03-13 1974-10-11 Munters Ab Carl
US3847211A (en) * 1969-01-28 1974-11-12 Sub Marine Syst Inc Property interchange system for fluids
US3947206A (en) * 1974-10-10 1976-03-30 Westvaco Corporation Corrugating apparatus
US4021179A (en) * 1973-06-01 1977-05-03 Agfa-Gevaert N.V. Apparatus for the edges of thermoplastic webs
JPS5424189A (en) * 1977-07-26 1979-02-23 Rengo Co Ltd Single facer for making oneeside corrugated cardboard
JPS5511875A (en) * 1978-07-12 1980-01-28 Setsutsu Itagami Kk Device for making singleeside corrugated cardboard
JPS5527230A (en) * 1978-08-18 1980-02-27 Tomoku Kk Single facer for manufacturing one side corrugated cardboard
US4261784A (en) * 1978-09-04 1981-04-14 Nihon Electronic Industry Co., Ltd. Apparatus for manufacturing single-faced corrugated board
FR2537501A1 (en) * 1982-12-13 1984-06-15 Molins Machine Co Inc METHOD FOR MANUFACTURING WAFER PAPER AND APPARATUS FOR CARRYING OUT SAID METHOD
US4542566A (en) * 1982-11-15 1985-09-24 Corrugating Roll Corporation Corrugating roller
JPH01295838A (en) * 1988-05-25 1989-11-29 Hiroo Ichikawa Method and apparatus for manufacturing composite corrugated body
WO1991017038A1 (en) * 1990-04-30 1991-11-14 Gilbert Capy Continuous film folding device for forming flattened folds and arrangement for forming fold-free areas
US5201697A (en) * 1990-10-01 1993-04-13 Gilbert Capy Process and apparatus for making a wrapping from a thin pleated sheet
US5628865A (en) * 1996-03-26 1997-05-13 Marquip, Inc. Single facer with small intermediate corrugating roll
US5772569A (en) * 1995-02-28 1998-06-30 Pussikeskus Oy Method and apparatus for the continuous production of package blanks
EP0870599A1 (en) * 1997-04-10 1998-10-14 Mitsubishi Heavy Industries, Ltd. Single-faced corrugated fiberboard sheet manufacturing apparatus
EP0878295A1 (en) * 1997-05-13 1998-11-18 Marquip, Inc. Improved single facer with small intermediate corrugating roll
US5908596A (en) * 1994-12-21 1999-06-01 Nicofibers, Inc. Process and apparatus for expanding and molding fiberglass laminate and the panel formed thereby
WO2002094538A1 (en) * 2001-05-25 2002-11-28 Dipiemme Dies And Plastic Machinery S.R.L. Procedure and apparatus for continuous production of corrugated/undulated sheets in a windable web; windable thermoplastic web with transverse corrugations/undulations
EP1491327A1 (en) * 2002-03-26 2004-12-29 Ube-Nitto Kasei Co. Ltd. Hollow structure plate, manufacturing method thereof, manufacturing device thereof, and sound absorbing structure plate
US20050034806A1 (en) * 2003-03-05 2005-02-17 Tilia International, Inc. Method for manufacturing liquid-trapping bag for use in vacuum packaging
US7022058B2 (en) 2001-02-21 2006-04-04 Tilia International, Inc. Method for preparing air channel-equipped film for use in vacuum package
US7087130B2 (en) 2003-03-05 2006-08-08 Tilia International, Inc. Method for manufacturing a sealable bag having an integrated zipper for use in vacuum packaging
US7138025B2 (en) 2003-03-05 2006-11-21 Tilia International, Inc. Method for manufacturing a sealable bag having an integrated tray for use in vacuum packaging
US7220053B2 (en) 2003-12-16 2007-05-22 Sunbeam Products, Inc. Flexible composite bag for vacuum sealing
WO2007094305A1 (en) * 2006-02-15 2007-08-23 The Yokohama Rubber Co., Ltd. Method and device for producing winding liner with spacer for unvulcanized strip rubber member, and method and device for producing spacer member for winding liner
US7517484B2 (en) 2003-03-24 2009-04-14 Sunbeam Products, Inc. Forming evacuation channels during single and multi-layer extrusion process
US7534039B2 (en) 2004-07-22 2009-05-19 Sunbeam Products, Inc. Vacuum packaging films patterned with protruding cavernous structures
EP2233276A1 (en) 2009-03-25 2010-09-29 Brother Kogyo Kabushiki Kaisha Cloth bonding apparatus
WO2012123260A1 (en) * 2011-03-11 2012-09-20 Inhouse Box Limited Apparatus for the manufacture of corrugated board
CN103419412A (en) * 2013-08-14 2013-12-04 朱丹华 Mechanical normal-temperature corrugated paper forming device
WO2014207159A2 (en) * 2013-06-28 2014-12-31 British American Tobacco (Investments) Limited Apparatus and method for corrugating sheet material

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1021701B (en) * 1953-09-14 1957-12-27 Badisch Wuertt Wellpappen Fabr Process for the production of corrugated cardboard impermeable to water vapor and / or aroma
DE1231413B (en) * 1954-12-24 1966-12-29 United Plastics Ind Inc Embossing roller for embossing films made from thermoplastics
FR1122016A (en) * 1955-01-03 1956-08-30 Method and device for stamping thermoplastic sheet materials and resulting industrial products
GB800599A (en) * 1955-01-04 1958-08-27 United Plastics Ind Inc Improvements in producing embossed thermoplastic film
DE1234974B (en) * 1957-01-11 1967-02-23 Mortimer Mark Marks Process for the continuous production of plastic films and apparatus for carrying out the process
DE1121316B (en) * 1957-01-25 1962-01-04 Guenther Missbach Dipl Ing Device for the continuous shaping of thermoplastic films
DE1162065B (en) * 1957-04-26 1964-01-30 Dornbusch & Co Embossing calender for embossing continuously continuous thermoplastic plastic webs
DE1125640B (en) * 1958-06-18 1962-03-15 Guenther Missbach Dipl Ing Device for the continuous shaping of thermoplastic films
DE1504078B1 (en) * 1962-03-06 1970-05-27 Chavannes Marc A Apparatus for producing a sheet-like cushioning material containing air-filled cells
DE2518683C3 (en) * 1975-04-26 1981-04-09 4P Verpackungen Gmbh, 8960 Kempten Heat exchanger made from two aluminum sheets connected to one another

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US657100A (en) * 1899-03-13 1900-09-04 Jeffrey T Ferres Apparatus for making corrugated paper.
US1146771A (en) * 1914-06-26 1915-07-13 Paper Working Machines Company Machine for manufacturing double-faced corrugated board.
US1264506A (en) * 1915-08-02 1918-04-30 John N Hahn Corrugated-paper-making machine.
US1473096A (en) * 1921-06-10 1923-11-06 Lawrence Paper Mfg Company Machine for making cellular board
US1595346A (en) * 1926-08-10 And walter a
US1981338A (en) * 1934-01-10 1934-11-20 George W Swift Jr Inc Machine for making corrugated paper board
US2018240A (en) * 1933-12-20 1935-10-22 George W Swift Jr Inc Machine for making corrugated paper board

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE478504C (en) * 1929-06-27 Bernhard Hoitz Dipl Ing Process to improve the drawability of wooden sheets
DE160920C (en) *
FR726871A (en) * 1932-11-19 1932-06-04 Fibre Diamond Manufacture of non-metallic gear rims, rollers, rings and the like
FR799847A (en) * 1935-12-24 1936-06-20 Metal clip to assemble and seal the wooden planks constituting the packaging boxes and the machine used in its manufacture
US2139922A (en) * 1936-09-12 1938-12-13 Marbon Corp Corrugated rubber bundle
FR844583A (en) * 1938-08-12 1939-07-27 Method for manufacturing a pleated screen and apparatus for carrying out the method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1595346A (en) * 1926-08-10 And walter a
US657100A (en) * 1899-03-13 1900-09-04 Jeffrey T Ferres Apparatus for making corrugated paper.
US1146771A (en) * 1914-06-26 1915-07-13 Paper Working Machines Company Machine for manufacturing double-faced corrugated board.
US1264506A (en) * 1915-08-02 1918-04-30 John N Hahn Corrugated-paper-making machine.
US1473096A (en) * 1921-06-10 1923-11-06 Lawrence Paper Mfg Company Machine for making cellular board
US2018240A (en) * 1933-12-20 1935-10-22 George W Swift Jr Inc Machine for making corrugated paper board
US1981338A (en) * 1934-01-10 1934-11-20 George W Swift Jr Inc Machine for making corrugated paper board

Cited By (64)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123838A (en) * 1964-03-10 Ventilated seat cushion
DE952662C (en) * 1947-10-31 1956-11-22 Dow Chemical Co Process and device for the continuous cooling and molding of organic, thermoplastic plastics
US2719566A (en) * 1951-12-12 1955-10-04 Associated Packaging Company Method of and machine for making a transparent corrugated board
US2862542A (en) * 1955-08-24 1958-12-02 Gen Motors Corp Apparatus and method for corrugating resin-impregnated sheet material
US3026231A (en) * 1957-12-23 1962-03-20 Sealed Air Corp Method of making an embossed laminated structure
US2996609A (en) * 1958-07-07 1961-08-15 Wilson Bertram Arnold Sheet panel
US3033734A (en) * 1959-08-27 1962-05-08 Gen Electric Honeycomb structures
US3142599A (en) * 1959-11-27 1964-07-28 Sealed Air Corp Method for making laminated cushioning material
US3208898A (en) * 1960-03-09 1965-09-28 Sealed Air Corp Apparatus for embossing and laminating materials
US3226458A (en) * 1960-12-30 1965-12-28 Detag Method and apparatus for continuously producing molded articles and sectional sheets of plastics
US3217425A (en) * 1962-09-25 1965-11-16 West Virginia Pulp & Paper Co Corrugator
US3317363A (en) * 1963-11-29 1967-05-02 Haveg Industries Inc Corrugated product
US3419937A (en) * 1965-08-13 1969-01-07 Corning Glass Works Filter and method and apparatus for its production
US3516889A (en) * 1965-10-20 1970-06-23 Diamond Crystal Salt Co Apparatus for making fluted packages
US3847211A (en) * 1969-01-28 1974-11-12 Sub Marine Syst Inc Property interchange system for fluids
FR2221257A1 (en) * 1973-03-13 1974-10-11 Munters Ab Carl
US4021179A (en) * 1973-06-01 1977-05-03 Agfa-Gevaert N.V. Apparatus for the edges of thermoplastic webs
US3947206A (en) * 1974-10-10 1976-03-30 Westvaco Corporation Corrugating apparatus
JPS5814305B2 (en) * 1977-07-26 1983-03-18 レンゴ−株式会社 Single facer for manufacturing single-sided corrugated board
JPS5424189A (en) * 1977-07-26 1979-02-23 Rengo Co Ltd Single facer for making oneeside corrugated cardboard
JPS5511875A (en) * 1978-07-12 1980-01-28 Setsutsu Itagami Kk Device for making singleeside corrugated cardboard
JPS5527230A (en) * 1978-08-18 1980-02-27 Tomoku Kk Single facer for manufacturing one side corrugated cardboard
JPS5915304B2 (en) * 1978-08-18 1984-04-09 株式会社ト−モク Single facer for single-sided corrugated board manufacturing
US4261784A (en) * 1978-09-04 1981-04-14 Nihon Electronic Industry Co., Ltd. Apparatus for manufacturing single-faced corrugated board
US4542566A (en) * 1982-11-15 1985-09-24 Corrugating Roll Corporation Corrugating roller
FR2537501A1 (en) * 1982-12-13 1984-06-15 Molins Machine Co Inc METHOD FOR MANUFACTURING WAFER PAPER AND APPARATUS FOR CARRYING OUT SAID METHOD
JPH01295838A (en) * 1988-05-25 1989-11-29 Hiroo Ichikawa Method and apparatus for manufacturing composite corrugated body
WO1991017038A1 (en) * 1990-04-30 1991-11-14 Gilbert Capy Continuous film folding device for forming flattened folds and arrangement for forming fold-free areas
FR2663621A2 (en) * 1990-04-30 1991-12-27 Capy Gilbert Device for progressive contraction (tightening) of non-symmetrical folds (pleats) produced from a film, and which are previously preformed on a toothed wheel
US5188265A (en) * 1990-04-30 1993-02-23 Gilbert Capy Continuous sheet pleating device for making overlapping pleats and arrangements for making areas with no pleats and method of making pleats
US5201697A (en) * 1990-10-01 1993-04-13 Gilbert Capy Process and apparatus for making a wrapping from a thin pleated sheet
US5908596A (en) * 1994-12-21 1999-06-01 Nicofibers, Inc. Process and apparatus for expanding and molding fiberglass laminate and the panel formed thereby
US5772569A (en) * 1995-02-28 1998-06-30 Pussikeskus Oy Method and apparatus for the continuous production of package blanks
US5628865A (en) * 1996-03-26 1997-05-13 Marquip, Inc. Single facer with small intermediate corrugating roll
WO1997035713A1 (en) * 1996-03-26 1997-10-02 Marquip, Inc. Single facer with small intermediate corrugating roll
US6311754B1 (en) 1996-03-26 2001-11-06 Marquip, Llc Single facer with small corrugating roll supported by independently mounted backing rolls
EP0870599A1 (en) * 1997-04-10 1998-10-14 Mitsubishi Heavy Industries, Ltd. Single-faced corrugated fiberboard sheet manufacturing apparatus
EP0878295A1 (en) * 1997-05-13 1998-11-18 Marquip, Inc. Improved single facer with small intermediate corrugating roll
US7022058B2 (en) 2001-02-21 2006-04-04 Tilia International, Inc. Method for preparing air channel-equipped film for use in vacuum package
WO2002094538A1 (en) * 2001-05-25 2002-11-28 Dipiemme Dies And Plastic Machinery S.R.L. Procedure and apparatus for continuous production of corrugated/undulated sheets in a windable web; windable thermoplastic web with transverse corrugations/undulations
US20080128080A1 (en) * 2002-03-26 2008-06-05 Masahiko Nakajima Hollow structure plate, manufacturing method thereof, manufacturing device thereof, and sound absorbing structure plate
US20050126852A1 (en) * 2002-03-26 2005-06-16 Masahiko Nakajima Hollow structure plate, manufacturing method thereof, manufacturing device thereof, and sound absorbing structure plate
US7878229B2 (en) 2002-03-26 2011-02-01 Ube Nitto Kasei Co., Ltd. Hollow structure plate, manufacturing method thereof, manufacturing device thereof, and sound absorbing structure plate
US7754312B2 (en) 2002-03-26 2010-07-13 Ube Nitto Kasei Co., Ltd. Hollow structure plate, manufacturing method thereof, manufacturing device thereof, and sound absorbing structure plate
US20080113128A1 (en) * 2002-03-26 2008-05-15 Masahiko Nakajima Hollow structure plate, manufacturing method thereof, manufacturing device thereof, and sound absorbing structure plate
EP1491327A1 (en) * 2002-03-26 2004-12-29 Ube-Nitto Kasei Co. Ltd. Hollow structure plate, manufacturing method thereof, manufacturing device thereof, and sound absorbing structure plate
EP1491327A4 (en) * 2002-03-26 2009-01-21 Ube Nitto Kasei Co Hollow structure plate, manufacturing method thereof, manufacturing device thereof, and sound absorbing structure plate
US20050034806A1 (en) * 2003-03-05 2005-02-17 Tilia International, Inc. Method for manufacturing liquid-trapping bag for use in vacuum packaging
US7087130B2 (en) 2003-03-05 2006-08-08 Tilia International, Inc. Method for manufacturing a sealable bag having an integrated zipper for use in vacuum packaging
US7138025B2 (en) 2003-03-05 2006-11-21 Tilia International, Inc. Method for manufacturing a sealable bag having an integrated tray for use in vacuum packaging
US7625459B2 (en) 2003-03-05 2009-12-01 Sunbeam Products, Inc. Method for manufacturing liquid-trapping bag for use in vacuum packaging
US7517484B2 (en) 2003-03-24 2009-04-14 Sunbeam Products, Inc. Forming evacuation channels during single and multi-layer extrusion process
US7220053B2 (en) 2003-12-16 2007-05-22 Sunbeam Products, Inc. Flexible composite bag for vacuum sealing
US7534039B2 (en) 2004-07-22 2009-05-19 Sunbeam Products, Inc. Vacuum packaging films patterned with protruding cavernous structures
US20080308218A1 (en) * 2006-02-15 2008-12-18 The Yokohama Rubber Co., Ltd. Method and Device for Producing Winding Liner with Spacer for Unvulcanized Strip Rubber Member, and Method and Device for Producing Spacer Member for Winding
WO2007094305A1 (en) * 2006-02-15 2007-08-23 The Yokohama Rubber Co., Ltd. Method and device for producing winding liner with spacer for unvulcanized strip rubber member, and method and device for producing spacer member for winding liner
EP2233276A1 (en) 2009-03-25 2010-09-29 Brother Kogyo Kabushiki Kaisha Cloth bonding apparatus
CN101843378B (en) * 2009-03-25 2012-09-12 兄弟工业株式会社 Cloth bonding apparatus
WO2012123260A1 (en) * 2011-03-11 2012-09-20 Inhouse Box Limited Apparatus for the manufacture of corrugated board
GB2502481A (en) * 2011-03-11 2013-11-27 Inhouse Box Ltd Apparatus for the manufacture of corrugated board
GB2502481B (en) * 2011-03-11 2017-08-23 Inhouse Box Ltd Apparatus for the manufacture of corrugated board
WO2014207159A2 (en) * 2013-06-28 2014-12-31 British American Tobacco (Investments) Limited Apparatus and method for corrugating sheet material
WO2014207159A3 (en) * 2013-06-28 2015-02-26 British American Tobacco (Investments) Limited Apparatus and method for corrugating sheet material
CN103419412A (en) * 2013-08-14 2013-12-04 朱丹华 Mechanical normal-temperature corrugated paper forming device

Also Published As

Publication number Publication date
DE882911C (en) 1953-07-13

Similar Documents

Publication Publication Date Title
US2429482A (en) Method and means for the production of foil material
US3550839A (en) Doubled walled plastic bag
EP2647495B1 (en) Production method and production line for corrugated board with preprinted face sheet
US3466212A (en) Quilted film process
US2236056A (en) Apparatus and method of making corrugated board
US2068155A (en) Machine for making corrugated paperboard
JPS6319601B2 (en)
US3630806A (en) Apparatus for the manufacture of packaging material having a corrugated core sheet of synthetic resin
JP2003181957A (en) Corrugated board manufacturing apparatus
US3496043A (en) Method of manufacturing an embossed laminated foam
AU709283B2 (en) Improved low pressure single facer
GB2168396A (en) A single facer
US2166749A (en) Machine for undulatingly corrugating cardboard
US2409249A (en) Insulating covering and method of making the same
ITGE950064A1 (en) METHOD AND DEVICE FOR MANUFACTURING PACKAGING CONTAINERS FROM PACKAGING SHEETS, IN PARTICULAR FOR CIGARETTES,
US6155320A (en) Method and apparatus for injecting steam at a single facer bonding nip
US1770757A (en) Machine for making corrugated board
US2896336A (en) Apparatus for drying web material
US2719566A (en) Method of and machine for making a transparent corrugated board
US4808363A (en) Composite web decurling apparatus and method
US5897824A (en) Surface heating for a corrugated medium web
KR20020016857A (en) Sealing roller and sealing roller element particularly for producing a tampon for feminine hygiene and method therefor
US1909513A (en) Method and apparatus for making laminated angular members
US1151681A (en) Machine for facing corrugated paper.
JP2000355061A (en) Method and apparatus for producing corrugated cardboard, and corrugated cardboard