EP0135431A1 - Manufacturing process for container lids to be opened by peeling, and lids obtained by the realisation of this method - Google Patents

Manufacturing process for container lids to be opened by peeling, and lids obtained by the realisation of this method Download PDF

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Publication number
EP0135431A1
EP0135431A1 EP84401674A EP84401674A EP0135431A1 EP 0135431 A1 EP0135431 A1 EP 0135431A1 EP 84401674 A EP84401674 A EP 84401674A EP 84401674 A EP84401674 A EP 84401674A EP 0135431 A1 EP0135431 A1 EP 0135431A1
Authority
EP
European Patent Office
Prior art keywords
strip
coating
lids
holes
intended
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.)
Granted
Application number
EP84401674A
Other languages
German (de)
French (fr)
Other versions
EP0135431B1 (en
Inventor
Daniel Wolfersperger
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.)
Amcor Flexibles Selestat SAS
Original Assignee
Alsacienne DAluminium
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
Application filed by Alsacienne DAluminium filed Critical Alsacienne DAluminium
Priority to AT84401674T priority Critical patent/ATE24697T1/en
Publication of EP0135431A1 publication Critical patent/EP0135431A1/en
Application granted granted Critical
Publication of EP0135431B1 publication Critical patent/EP0135431B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
    • B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
    • B65D77/2044—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure
    • B65D77/2048—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut
    • B65D77/2056—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut the cover being weakened
    • B65D77/206—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut the cover being weakened so as to uncover one or more preformed openings made through some layers of the cover
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers
    • B65D2577/2066—Means on, or attached to, container flange facilitating opening, e.g. non-bonding region, cut-out
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers
    • B65D2577/2075—Lines of weakness or apertures
    • B65D2577/2091—Lines of weakness or apertures in cover
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1056—Perforating lamina
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062—Prior to assembly

Definitions

  • the present invention relates to a method of manufacturing lids intended for closing receptacles with peeling openings, these lids being of the type comprising an orifice and two closing elements arranged on either side of the orifice which they seal and in which they adhere to each other.
  • Lids of this type have been developed to close containers containing food products such as drinks or yogurt. Those currently found on the market are not entirely satisfactory, however.
  • the installation of their closing elements indeed requires a lot of time and leads to relatively high manufacturing costs.
  • their internal closing element that is to say the one which is intended to be on the side of the product to be packaged, is clearly smaller than the inlet of the container and does not always perfectly fulfill its function of sealing. In addition, it is often difficult to position on the opening.
  • the manufacturing of the lids can thus be entirely mechanized, which makes it possible to accelerate the production rates and consequently to lower the cost price of these lids.
  • the containers can be closed in a perfectly sealed manner and the quality of the packaged product is therefore not likely to deteriorate over time.
  • the first and second coatings When at least one of the first and second coatings is called upon to constitute one of the faces of the multilayer ply, it may be advantageous to apply it by extrusion-lamination, laminating or paraffinizing.
  • the multilayer ply when it is desirable for the multilayer ply to have more than three layers, at least one of the first and second coatings can be applied by sandwich extrusion between the perforated strip and an additional strip.
  • opening primers are produced between the perforated strip and the first coating, in areas located on the cutting lines of the multilayer ply.
  • the consumer has a better grip on the first coating and will therefore be able to separate it more easily from the perforated strip.
  • the part of the second coating which is integral with the first coating will of course be torn off with the latter, which will then allow the consumer to have access to the contents of the container.
  • the opening primers can be produced by creating zones of non-adhesion on the strip, prior to the application of the first coating, for example by application of a varnish based on polysiloxane or polyamide or nitrocellulose ink, on rotogravure or flexo printer.
  • the opening primers can also be produced by carrying out additional perforations in the strip, prior to the application of the first and second coatings.
  • the second coating is covered by an additional strip
  • the interface between the additional strip and the second coating is generally sterile, it will suffice to provide a sterile enclosure and to carry out therein the peeling of the additional strip, the filling of the containers, and the sealing of the lids (so that the second coating is turned towards the containers) to condition a product perfectly aseptically.
  • the multilayer ply 1 which is shown on the left in FIG. 1 is in the form of a coil making it possible to produce it with a length of several hundred linear meters.
  • the ply 1 is made up of three layers, namely an intermediate strip 2 pierced with holes 3 judiciously spaced from each other, and two coatings 4,5 applied to the upper faces and lower of the intermediate strip, these two coverings closing the holes 3 in which they strongly adhere to one another.
  • the ply 1 could comprise more than three layers, the coatings 4 and 5 possibly being covered in turn by a coating with one or more layers.
  • the intermediate strip 2 can have a thickness of the order of 15 to 200 microns (1.5 to 20.10 -5 m) and be made of metal, in particular aluminum or aluminum alloy, of a cellulosic material such as paper , or a synthetic material such as polyvinyl chloride, polyester, polypropylene, polyethylene, polyamide, polybutylene, etc.
  • the coatings 4,5 may have a thickness of the order of 10 to 100 microns (1 to 10 ⁇ 10 -5 m) and be made of a synthetic material such as polyester, polypropylene, polyethylene, polybutylene, a polyamide, an ethylene-acrylic acid copolymer, an ionomer resin, etc.
  • the coating 4, that is to say that which is fixed on the upper face of the intermediate strip 2 is made of a material which has little affinity for the latter so as to be able to be separated therefrom relatively easily by peeling.
  • the covering 5 is made of a material which has a great affinity for the intermediate strip and the covering 4, so that it cannot be separated from the latter.
  • the coatings 4 and 5 are themselves coated with an additional coating, the latter is preferably constituted by an aluminum strip optionally coated on its external face with a layer of polyester, polypropylene, polyethylene , polybutylene, polyamide, ethylene-acrylic acid copolymer, ionomer resin, fusible varnish, etc.
  • the multilayer ply 1 is intended to be cut along the closed lines 6 corresponding to the outline of the lids 7 to be produced.
  • the location of these lines, as well as that of the holes 3 of the intermediate strip 2, are of course chosen so that each cover has a hole 3 and that the cutting falls are as small as possible.
  • the ply 1 comprises, between the intermediate strip 2 and the coating 4, non-adhesion zones 8 adjacent to one of the sides of the lids 7. These zones are in fact provided to allow the consumer wishing to open a container closed by a cover 7 to more easily grasp the coating 4 in order to remove it without difficulty by peeling.
  • non-adhesion zones 8 can be produced on the intermediate strip by printing a varnish or an ink on a gravure or flexo printer, prior to the application of the film 13.
  • the coating 4 When the coating 4 is deposited over the entire length of the intermediate strip, the latter is then turned over and put back into circulation between the cylinders 10 and 11, as shown in FIG. 3.
  • the film 14 is in turn slightly pushed back into the holes 3 (and the holes 9 when these exist) during its passage between the cylinders 10, 11, which allows it to come into contact with the coating 4 and strongly adhere to the latter, after which it solidifies between the above-mentioned cooling cylinders.
  • the coatings 4 and 5 could of course be applied with the same machine equipped with two dies. Furthermore, to increase the adhesion between one of the coatings and the strip 2, for example at the periphery of the holes 3 (and 9 if these exist), the corresponding face of the strip may be coated with a promoter d adhesion applied by a helio element integrated on the extruder, or treating said face by effluvage, in particular by Corona discharge.
  • FIG. 5 illustrates the sandwich extrusion technique
  • the film 19, which consists of a molten material which may be one of those used to produce the coating 5, is slightly pushed back into the holes 3 of the strip 2, then cooled in a manner known per se.
  • the material constituting the film 19 could have a great affinity for the strip 2 and little affinity for the additional strip 15.
  • the additional strip could in fact be separated by peeling from the strip 2, which would make it possible to put bare a sterile surface.
  • FIG. 6 which illustrates the technique of lamination
  • the perforated strip 2 and a strip 20, preferably made of aluminum circulate between two rotary cylinders 21, 22.
  • the sheet 20 circulates between a cylinder 23 immersed in an adhesive bath 24 and a pressure cylinder 25.
  • the strip 20 is slightly pushed back into the holes 3 during its passage between the cylinders 21, 22 and adheres perfectly to the strip 2 at the outlet of an appropriate dryer (not shown) making it possible to evaporate the water contained in the glue .
  • FIG. 7 illustrates the waxing technique
  • the perforated strip 2 circulates in a bath of wax 26 or "hot-melt" in the molten state, before being sandwiched between two bands 27, 28, metallic or not, flowing between two rotary cylinders 29, 30.
  • the bands 27 and 28 adhere to each other in the holes 3 (and the holes 9 when these exist) while a cooling cylinder (not shown) is provided to harden and solidify the wax or hot-melt.
  • FIG. 7 shows an installation making it possible to fix the two strips 2 7, 28 simultaneously on the strip 2. It goes without saying, however, that only one of the two strips 27 and 28 could be fixed by waxing.
  • the technique used to apply the coating 4 could of course be different from that used to apply the coating 5.
  • the multi-layer tablecloths 1 are supplied on a reel to manufacturers processing products such as drinks or yoghurts.
  • these manufacturers manufacture containers of the type of those shown at 32 in FIGS. 8 to 10, generally by thermoforming a strip of plastic material, then fill the containers 32 with the product, fix the multilayer sheet 1 or 1a (with the coating 4 facing upwards) by heat-sealing, crimping or ultrasonic welding along the entry of the containers, and cut the sheet 1 or along the lines 6 visible in FIG. 1, which correspond to the outer contour of the container opening (and to that of the tabs 9 in the case of the sheet 1a).
  • the sheets 1 or 1a could be brought down for a few minutes to a temperature above 100 ° C. in order to make them sterile and to allow the packaging of the products under perfectly aseptic conditions.
  • the part of the ply 1 which corresponds to one of the holes 9 in the strip 2, constitutes a gripping tab which the consumer can easily grasp to separate the coating. 4 of the strip 2 and tear off the part of the covering 5 located in the hole 3.
  • the present invention also relates to the lids obtained by the implementation of the method described above, as well as the containers closed by such lids.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Packages (AREA)
  • Laminated Bodies (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Closing Of Containers (AREA)
  • Cartons (AREA)
  • Making Paper Articles (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Wrappers (AREA)

Abstract

A process for manufacturing covers intended to close containers which are opened by peeling off the cover, these covers being of a type comprising an orifice and two closure elements disposed on each side of the orifice which they close and in which they adhere to one another, characterized in that it consists: in forming a series of holes (3) intended to form the orifices of the covers in a strip (2); in applying to one of the faces of the perforated strip (2) a first continuous coating (4) intended to form one of the two closure elements, this first coating being separable at least partially from the strip (2) by peeling off; in applying to the other face of the perforated strip (2) a second continuous coating (5) so that it comes into contact with the parts of the first coating (4) which are defined by the holes (3) and adheres strongly to these parts as well as to the perforated strip (2), this second coating (5) being intended to form the other closure element; and in cutting out the multi-layer sheet (1) thus formed so that the holes (3) are all situated in a cover (7).

Description

La présente invention concerne un procédé de fabrication d'opercules destinés à fermer des récipients à ouverture par pelage, ces opercules étant du type comportant un orifice et deux éléments de fermeture disposés de part et d'autre de l'orifice qu'ils obturent et dans lequel ils adhèrent l'un à l'autre.The present invention relates to a method of manufacturing lids intended for closing receptacles with peeling openings, these lids being of the type comprising an orifice and two closing elements arranged on either side of the orifice which they seal and in which they adhere to each other.

Les opercules de ce type ont été mis au point pour fermer des récipients contenant des produits alimentaires tels que des boissons ou des yaourts. Ceux que l'on trouve actuellement sur le marché ne donnent toutefois pas entière satisfaction. La mise en place de leurs éléments de fermeture demande en effet beaucoup de temps et entraîne des coûts de fabrication relativement élevés. Par ailleurs, leur élément de fermeture interne, c'est-à-dire celui qui est destiné à être du côté du produit à conditionner, est nettement plus petit que l'entrée du récipient et n'assure pas toujours parfaitement sa fonction d'étanchéité. Eh outre, il est souvent difficile à positionner sur l'ouverture.Lids of this type have been developed to close containers containing food products such as drinks or yogurt. Those currently found on the market are not entirely satisfactory, however. The installation of their closing elements indeed requires a lot of time and leads to relatively high manufacturing costs. Furthermore, their internal closing element, that is to say the one which is intended to be on the side of the product to be packaged, is clearly smaller than the inlet of the container and does not always perfectly fulfill its function of sealing. In addition, it is often difficult to position on the opening.

La présente invention se propose de remédier à ces inconvénients et, pour ce faire, elle a pour objet un procédé de fabrication d'opercules destinés à fermer des récipients à ouverture par pelage, ce procédé étant caractérisé en ce qu'il consiste :

  • - à réaliser dans une bande une série de trous destinés à constituer les orifices des opercules ;
  • - à appliquer sur l'une des faces de la bande perforée un premier revêtement continu destiné à constituer l'un des deux éléments de fermeture, ce premier revêtement étant susceptible d'être séparé au moins partiellement de la bande par pelage ;
  • - à appliquer sur l'autre face de la bande perforée un second revêtement continu de manière à ce qu'il vienne en contact avec les parties du premier revêtement qui sont délimitées par les trous et adhère fortement à ces parties ainsi qu'à la bande perforée, ce second revêtement étant destiné à constituer l'autre élément de fermeture ; et
  • - à découper la nappe multicouche ainsi formée de telle sorte que les trous soient tous situés dans un opercule.
The present invention proposes to remedy these drawbacks and, to do this, it relates to a process for manufacturing lids intended to close containers with opening by peeling, this process being characterized in that it consists:
  • - To produce in a strip a series of holes intended to constitute the orifices of the lids;
  • to apply to one of the faces of the perforated strip a first continuous coating intended to constitute one of the two closing elements, this first coating being capable of being at least partially separated from the strip by peeling;
  • - applying a second continuous coating to the other side of the perforated strip so that it comes into contact with the parts of the first coating which are delimited by the holes and strongly adheres to these parts as well as to the strip perforated, this second covering being intended to constitute the other closing element; and
  • - Cutting the multi-layer sheet thus formed so that the holes are all located in a cover.

La fabrication des opercules peut ainsi être entièrement mécanisée, ce qui permet d'accélérer les cadences de production et d'abaisser par conséquent le prix de revient de ces opercules. En outre, comme les premier et second revêtements recouvrent entièrement les deux faces des opercules, les récipients peuvent être fermés de façon parfaitement étanche et la qualité du produit conditionné ne risque donc pas de s'altérer dans le temps.The manufacturing of the lids can thus be entirely mechanized, which makes it possible to accelerate the production rates and consequently to lower the cost price of these lids. In addition, as the first and second coatings completely cover the two faces of the lids, the containers can be closed in a perfectly sealed manner and the quality of the packaged product is therefore not likely to deteriorate over time.

Lorsque l'un au moins des premier et second revêtements est appelé à constituer l'une des faces de la nappe multicouche, il peut être avantageux de l'appliquer par extrusion-lamination, contre-collage ou paraffinage.When at least one of the first and second coatings is called upon to constitute one of the faces of the multilayer ply, it may be advantageous to apply it by extrusion-lamination, laminating or paraffinizing.

Par contre, lorsqu'il est souhaitable que la nappe multicouche comporte plus de trois couches, on peut appliquer l'un au moins des premier et second revêtements par extrusion-sandwich entre la bande perforée et une bande supplémentaire.On the other hand, when it is desirable for the multilayer ply to have more than three layers, at least one of the first and second coatings can be applied by sandwich extrusion between the perforated strip and an additional strip.

Avantageusement, on réalise des amorces d'ouverture entre la bande perforée et le premier revêtement, dans des zones situées sur les lignes de découpage de la nappe multicouche.Advantageously, opening primers are produced between the perforated strip and the first coating, in areas located on the cutting lines of the multilayer ply.

Grâce à ces amorces d'ouverture, le consommateur dispose d'une meilleure prise sur le premier revêtement et pourra donc le séparer plus facilement de la bande perforée. Pendant cette opération, la partie du second revêtement qui est solidaire du premier revêtement sera bien entendu arrachée avec celui-ci, ce qui permettra alors au consommateur d'avoir accès au contenu du récipient.Thanks to these opening primers, the consumer has a better grip on the first coating and will therefore be able to separate it more easily from the perforated strip. During this operation, the part of the second coating which is integral with the first coating will of course be torn off with the latter, which will then allow the consumer to have access to the contents of the container.

Selon un mode de mise en oeuvre particulier du procédé conforme à l'invention, on peut réaliser les amorces d'ouverture en créant des zones de non adhérence sur la bande, préalablement à l'application du premier revêtement, par exemple par application d'un vemis à base de polysiloxane ou de polyamide ou d'une encre nitrocellulosique, sur imprimeuse hélio ou flexo.According to a particular embodiment of the process according to the invention, the opening primers can be produced by creating zones of non-adhesion on the strip, prior to the application of the first coating, for example by application of a varnish based on polysiloxane or polyamide or nitrocellulose ink, on rotogravure or flexo printer.

Selon un autre mode de mise en oeuvre particulier de ce procédé, on peut aussi réaliser les amorces d'ouverture en exécutant des perforations supplémentaires dans la bande, préalablement à l'application des premier et second revêtements.According to another particular embodiment of this method, the opening primers can also be produced by carrying out additional perforations in the strip, prior to the application of the first and second coatings.

Dans le cas où le second revêtement est recouvert par une bande supplémentaire, il peutêtre souhaitable que celle-ci soit séparable par pelage. En effet, comme l'interface entre la bande supplémentaire et le second revêtement est généralement stérile, il suffira de prévoir une enceinte stérile et de réaliser dans celle-ci le pelage de la bande supplémentaire, le remplissage des récipients, et le scellage des opercules (de telle sorte que le second revêtement soit tourné vers les récipients) pour conditionner un produit de manière parfaitement aseptique.In the case where the second coating is covered by an additional strip, it may be desirable for this to be separable by peeling. Indeed, as the interface between the additional strip and the second coating is generally sterile, it will suffice to provide a sterile enclosure and to carry out therein the peeling of the additional strip, the filling of the containers, and the sealing of the lids (so that the second coating is turned towards the containers) to condition a product perfectly aseptically.

D'autres caractéristiques et avantages de la présente invention ressortiront de la description qui sera donnée ci-après à titre d'exemple nullement limitatif en référence aux dessins annexés dans lesquels :

  • - la figure 1 est une vue en perspective schématique montrant une bobine formée par l'enroulement d'une nappe multicouche obtenue lors de la mise en oeuvre du procédé conforme à l'invention, ainsi qu'un tronçon d'une autre nappe multicouche légèrement différente de la précédente ;
  • - la figure 2 est une vue schématique d'une machine réalisant l'extrusion-lamination d'un revêtement sur une bande perforée ;
  • - la figure 3 est une vue analogue à la figure 2, mais montrant la machine réalisant l'extrusion-lamination d'un autre revêtement sur l'autre face de la bande ;
  • - la figure 4 est une vue en coupe à échelle agrandie de la nappe multicouche visible sur la figure 3 ;
  • - la figure 5 est une vue schématique d'une machine réalisant l'extrusion-sandwich d'un revêtement entre une bande perforée et une bande supplémentaire ;
  • - la figure 6 est une vue schématique d'une machine permettant de contre- coller une bande supplémentaire sur l'une des faces d'une bande perforée ;
  • - la figure 7 est une vue schématique d'une machine permettant de fixer par paraffinage une bande supplémentaire sur chacune des faces d'une bande perforée ;
  • - la figure 8 est une vue en perspective montrant un récipient obturé par un opercule obtenu par la mise en oeuvre du procédé conforme à l'invention ;
  • - la figure 9 est une vue en perspective du récipient visible sur la figure 8, mais pendant l'ouverture de celui-ci ; et
  • - la figure 10 est une vue en perspective d'un récipient obturé par un autre opercule obtenu par la mise en oeuvre du procédé selon l'invention.
Other characteristics and advantages of the present invention will emerge from the description which will be given below by way of nonlimiting example with reference to the appended drawings in which:
  • - Figure 1 is a schematic perspective view showing a coil formed by the winding of a multilayer ply obtained during the implementation of the method according to the invention, as well as a section of another slightly multilayer ply different from the previous one;
  • - Figure 2 is a schematic view of a machine performing the extrusion-lamination of a coating on a perforated strip;
  • - Figure 3 is a view similar to Figure 2, but showing the machine performing the extrusion-lamination of another coating on the other side of the strip;
  • - Figure 4 is a sectional view on an enlarged scale of the multilayer web visible in Figure 3;
  • - Figure 5 is a schematic view of a machine performing the sandwich extrusion of a coating between a perforated strip and an additional strip;
  • - Figure 6 is a schematic view of a machine for laminating an additional strip on one side of a perforated strip;
  • - Figure 7 is a schematic view of a machine for fixing by waxing an additional strip on each side of a perforated strip;
  • - Figure 8 is a perspective view showing a container closed by a cover obtained by the implementation of the method according to the invention;
  • - Figure 9 is a perspective view of the container visible in Figure 8, but during the opening thereof; and
  • - Figure 10 is a perspective view of a container closed by another seal obtained by the implementation of the method according to the invention.

La nappe multicouche 1 qui est représentée à gauche sur la figure 1 se présente sous la forme d'une bobine permettant de la réaliser avec une longueur de plusieurs centaines de mètres linéaires.The multilayer ply 1 which is shown on the left in FIG. 1 is in the form of a coil making it possible to produce it with a length of several hundred linear meters.

Dans l'exemple de réalisation illustré sur la figure 1, la nappe 1 se compose de trois couches, à savoir une bande intermédiaire 2 percée de trous 3 judicieusement espacés les uns des autres, et deux revêtements 4,5 appliqués sur les faces supérieure et inférieure de la bande intermédiaire, ces deux revêtements obturant les trous 3 dans lesquels ils adhèrent fortement l'un à l'autre.In the embodiment illustrated in FIG. 1, the ply 1 is made up of three layers, namely an intermediate strip 2 pierced with holes 3 judiciously spaced from each other, and two coatings 4,5 applied to the upper faces and lower of the intermediate strip, these two coverings closing the holes 3 in which they strongly adhere to one another.

Dans certains cas, la nappe 1 pourrait comprendre plus de trois couches, les revêtements 4 et 5 pouvant éventuellement être recouverts à leur tour par un revêtement à une ou plusieurs couches.In certain cases, the ply 1 could comprise more than three layers, the coatings 4 and 5 possibly being covered in turn by a coating with one or more layers.

La bande intermédiaire 2 peut avoir une épaisseur de l'ordre de 15 à 200 microns (1,5 à 20.10-5 m) et être en métal, notamment en aluminium ou en alliage d'aluminium, en une matière cellulosique telle que du papier, ou en une matière synthétique telle qu'un chlorure de polyvinyle, un polyester, un polypropylène, un polyéthylène, un polyamide, un polybutylène, etc...The intermediate strip 2 can have a thickness of the order of 15 to 200 microns (1.5 to 20.10 -5 m) and be made of metal, in particular aluminum or aluminum alloy, of a cellulosic material such as paper , or a synthetic material such as polyvinyl chloride, polyester, polypropylene, polyethylene, polyamide, polybutylene, etc.

Les revêtements 4,5 peuvent quant à eux avoir une épaisseur de l'ordre de 10 à 100 microns (1 à 10.10-5 m) et être en une matière synthétique telle qu'un polyester, un polypropylène, un polyéthylène, un polybutylène, un polyamide, un copolymère éthylène-acide acrylique, une résine ionomère, etc...The coatings 4,5 may have a thickness of the order of 10 to 100 microns (1 to 10 × 10 -5 m) and be made of a synthetic material such as polyester, polypropylene, polyethylene, polybutylene, a polyamide, an ethylene-acrylic acid copolymer, an ionomer resin, etc.

Le revêtement 4, c'est-à-dire celui qui est fixé sur la face supérieure de la bande intermédiaire 2 est en une matière qui a peu d'affinité pour cette dernière de manière à pouvoir en être séparé relativement aisément par pelage. Au contraire, le revêtement 5 est en une matière qui a une grande affinité pour la bande intermédiaire et le revêtement 4,afin qu'il ne puisse pas être séparé de ces derniers.The coating 4, that is to say that which is fixed on the upper face of the intermediate strip 2 is made of a material which has little affinity for the latter so as to be able to be separated therefrom relatively easily by peeling. On the contrary, the covering 5 is made of a material which has a great affinity for the intermediate strip and the covering 4, so that it cannot be separated from the latter.

On notera ici que lorsque les revêtements 4 et 5 sont eux-mêmes revêtus d'un revêtement supplémentaire, celui-ci est de préférence constitué par une bande d'aluminium éventuellement revêtue sur sa face externe d'une couche de polyester, polypropylène, polyéthylène, polybutylène, polyamide, copolymère éthylène-acide acrylique, résine ionomère, vernis thermocollant, etc...It will be noted here that when the coatings 4 and 5 are themselves coated with an additional coating, the latter is preferably constituted by an aluminum strip optionally coated on its external face with a layer of polyester, polypropylene, polyethylene , polybutylene, polyamide, ethylene-acrylic acid copolymer, ionomer resin, fusible varnish, etc.

La nappe multicouche 1 est destinée à être découpée le long des lignes fermées 6 correspondant au contour des opercules 7 à réaliser. L'emplacement de ces lignes, ainsi que celui des trous 3 de la bande intermédiaire 2, sont bien entendu choisis pour que chaque opercule comporte un trou 3 et que les chutes de découpage soient le plus faible possible.The multilayer ply 1 is intended to be cut along the closed lines 6 corresponding to the outline of the lids 7 to be produced. The location of these lines, as well as that of the holes 3 of the intermediate strip 2, are of course chosen so that each cover has a hole 3 and that the cutting falls are as small as possible.

On remarquera ici que la nappe 1 comporte, entre la bande intermédiaire 2 et le revêtement 4, des zones de non adhérence 8 adjacentes à l'un des côtés des opercules 7. Ces zones sont en effet prévues pour permettre au consommateur souhaitant ouvrir un récipient obturé par un opercule 7 de saisir plus facilement le revêtement 4 afin de l'enlever sans difficulté par pelage.It will be noted here that the ply 1 comprises, between the intermediate strip 2 and the coating 4, non-adhesion zones 8 adjacent to one of the sides of the lids 7. These zones are in fact provided to allow the consumer wishing to open a container closed by a cover 7 to more easily grasp the coating 4 in order to remove it without difficulty by peeling.

En se référant maintenant au tronçon de nappe 1a représenté à droite sur la figure 1, on notera que les zones de non adhérence 8 ont été remplacées par des languettes 9 situées non plus à l'intérieur, mais à l'extérieur des opercules. Ces languettes, qui ont également pour but de faciliter le pelage du revêtement 4, sont réalisées en perçant une seconde série de trous dans la bande intermédiaire 2, les revêtements 4 et 5 obturant encore ces autres trous en y adhérant l'un à l'autre.Referring now to the section of ply 1a shown on the right in FIG. 1, it will be noted that the zones of non-adhesion 8 have been replaced by tongues 9 located no longer inside, but outside of the lids. These tabs, which also have the purpose of facilitating the peeling of the coating 4, are produced by drilling a second series of holes in the intermediate strip 2, the coatings 4 and 5 further sealing off these other holes by adhering to them one with the other.

On va maintenant décrire plusieurs techniques permettant d'appliquer un ou plusieurs revêtements sur une bande perforée telle que la bande intermédiaire 2 des nappes 1 et 1a.We will now describe several techniques for applying one or more coatings on a perforated strip such as the intermediate strip 2 of the plies 1 and 1a.

En se référant tout d'abord à la figure 2 qui illustre la technique de l'extrusion-lamination, on voit que la bande intermédiaire 2 circule entre deux cylindres rotatifs 10, 11 tandis qu'une filière 12 de conception classique délivre un film visqueux 13 dans la fente ménagée entre la face supérieure de la bande 2 et le cyclindre aval 11. Le film 13, qui est constitué par un matériau en fusion destiné à former le revêtement 4, est légèrement refoulé dans les trous 3 (et le cas échéant dans les trous correspondant aux languettes 9) de la bande 2 lors de son passage entre les deux cylindres, puis refroidi entre deux cylindres appropriés non représentés.Referring first to Figure 2 which illustrates the technique of ex trusion-lamination, it can be seen that the intermediate strip 2 circulates between two rotary cylinders 10, 11 while a die 12 of conventional design delivers a viscous film 13 in the slot formed between the upper face of the strip 2 and the downstream cyclinder 11 The film 13, which consists of a molten material intended to form the coating 4, is slightly pushed back into the holes 3 (and where appropriate in the holes corresponding to the tongues 9) of the strip 2 during its passage between the two cylinders, then cooled between two suitable cylinders not shown.

On notera ici que les zones de non adhérence 8 peuvent être réalisées sur la bande intermédiaire par impression d'un vernis ou d'une encre sur imprimeuse hélio ou flexo, préalablement à l'application du film 13.It will be noted here that the non-adhesion zones 8 can be produced on the intermediate strip by printing a varnish or an ink on a gravure or flexo printer, prior to the application of the film 13.

Lorsque le revêtement 4 est déposé sur toute la longueur de la bande intermédiaire, celle-ci est alors retournée et mise à nouveau en circulation entre les cylindres 10 et 11, comme représenté sur la figure 3. La filière 12, qui contient maintenant l'un des matériaux utilisés pour la réalisation du revêtement 5, délivre un film visqueux 14 dans la fente ménagée entre la face de la bande 2 qui est encore à nu et le cylindre 11.When the coating 4 is deposited over the entire length of the intermediate strip, the latter is then turned over and put back into circulation between the cylinders 10 and 11, as shown in FIG. 3. The die 12, which now contains the one of the materials used for producing the coating 5, delivers a viscous film 14 in the slot formed between the face of the strip 2 which is still exposed and the cylinder 11.

Le film 14 est à son tour légèrement refoulé dans les trous 3 (et les trous 9 lorsque ceux-ci existent) lors de son passage entre les cylindres 10, 11, ce qui lui permet de venir en contact avec le revêtement 4 et d'adhérer fortement à ce dernier, après quoi il se solidifie entre les cylindres refrαidis- seurs mentionnés ci-dessus.The film 14 is in turn slightly pushed back into the holes 3 (and the holes 9 when these exist) during its passage between the cylinders 10, 11, which allows it to come into contact with the coating 4 and strongly adhere to the latter, after which it solidifies between the above-mentioned cooling cylinders.

Les revêtements 4 et 5 pourraient bien entendu être appliqués avec une même machine équipée de deux filières. Par ailleurs, pour accroître l'adhérence entre l'un des revêtements et la bande 2, par exemple à la périphérie des trous 3 (et 9 si ceux-ci existent), on pourra enduire la face correspondante de la bande avec un promoteur d'adhérence appliqué par un élément hélio intégré sur l'extrudeuse, ou traiter ladite face par effluvage, notamment par décharge Corona.The coatings 4 and 5 could of course be applied with the same machine equipped with two dies. Furthermore, to increase the adhesion between one of the coatings and the strip 2, for example at the periphery of the holes 3 (and 9 if these exist), the corresponding face of the strip may be coated with a promoter d adhesion applied by a helio element integrated on the extruder, or treating said face by effluvage, in particular by Corona discharge.

En se référant maintenant à la figure 5 qui illustre la technique de l'extrusion-sandwich, on voit que la bande 2 et une bande supplémentaire 15 circulent entre deux cylindres rotatifs 16, 17, tandis qu'une filière 18 délivre un film visqueux 19 dans la fente ménagée entre les deux bandes 2 et 15.Referring now to FIG. 5 which illustrates the sandwich extrusion technique, it can be seen that the strip 2 and an additional strip 15 circulate between two rotary cylinders 16, 17, while a die 18 delivers a viscous film 19 in the slot made between the two strips 2 and 15.

Le film 19, qui est constitué par un matériau en fusion pouvant être l'un de ceux utilisés pour réaliser le revêtement 5, est légèrement refoulé dans les trous 3 de la bande 2, puis refroidi d'une manière connue en soi.The film 19, which consists of a molten material which may be one of those used to produce the coating 5, is slightly pushed back into the holes 3 of the strip 2, then cooled in a manner known per se.

Le matériau constituant le film 19 pourrait avoir une grande affinité pour la bande 2 et peu d'affinité pour la bande supplémentaire 15. Dans ce cas, la bande supplémentaire pourrait en effet être séparée par pelage de la bande 2, ce qui permettrait de mettre à nu une surface stérile.The material constituting the film 19 could have a great affinity for the strip 2 and little affinity for the additional strip 15. In this case, the additional strip could in fact be separated by peeling from the strip 2, which would make it possible to put bare a sterile surface.

En se référant par ailleurs à la figure 6, qui illustre la technique du contre-collage, on voit que la bande perforée 2 et une bande 20, de préférence en aluminium, circulent entre deux cylindres rotatifs 21, 22. Avant d'atteindre le cylindre 21, la feuille 20 circule entre un cylindre 23 immergé dans un bain de colle 24 et un cylindre presseur 25.Referring moreover to FIG. 6, which illustrates the technique of lamination, it can be seen that the perforated strip 2 and a strip 20, preferably made of aluminum, circulate between two rotary cylinders 21, 22. Before reaching the cylinder 21, the sheet 20 circulates between a cylinder 23 immersed in an adhesive bath 24 and a pressure cylinder 25.

La bande 20 est légèrement refoulée dans les trous 3 lors de son passage entre les cylindres 21, 22 et adhère parfaitement à la bande 2 à la sortie d'un séchoir approprié (non représenté) permettant d'évaporer l'eau contenue dans la colle.The strip 20 is slightly pushed back into the holes 3 during its passage between the cylinders 21, 22 and adheres perfectly to the strip 2 at the outlet of an appropriate dryer (not shown) making it possible to evaporate the water contained in the glue .

Pour fixer une seconde bande métallique sur l'autre face de la bande 2, on pourrait encore utiliser l'installation représentée sur la figure 6. On pourrait toutefois utiliser une installation permettant de réaliser l'encollage de la seconde bande métallique avec une colle réactive à au moins deux composants, cette installation comportant alors des séchoirs pour évaporer les solvants et des cylindres chauffants pour réactiver la colle. On pourrait également utiliser une installation permettant 1' emploi de colles sans solvants.To fix a second metal strip on the other face of the strip 2, one could also use the installation shown in FIG. 6. One could however use an installation allowing the second metal strip to be bonded with a reactive adhesive. with at least two components, this installation then comprising driers to evaporate the solvents and heating cylinders to reactivate the adhesive. One could also use an installation allowing the use of glues without solvents.

En se référant maintenant à la figure 7, qui illustre la technique du paraffinage, on voit que la bande perforée 2 circule dans un bain de cire 26 ou de "hot-melt" à l'état fondu, avant d'être prise en sandwich entre deux bandes 27, 28, métalliques ou non, circulant entre deux cylindres rotatifs 29, 30. A la sortie de ces derniers, les bandes 27 et 28 adhèrent l'une à l'autre dans les trous 3 (et les trous 9 lorsque ceux-ci existent) tandis qu'un cylindre refroidisseur (non représenté) est prévu pour durcir et solidifier la cire ou le hot-melt.Referring now to FIG. 7, which illustrates the waxing technique, it can be seen that the perforated strip 2 circulates in a bath of wax 26 or "hot-melt" in the molten state, before being sandwiched between two bands 27, 28, metallic or not, flowing between two rotary cylinders 29, 30. At the exit of the latter, the bands 27 and 28 adhere to each other in the holes 3 (and the holes 9 when these exist) while a cooling cylinder (not shown) is provided to harden and solidify the wax or hot-melt.

La figure 7 montre une inetallation permettant de fixer samultanément les deux bandes 27, 28 sur la bande 2. Il va de soi cependant qu'une seule des deux bandes 27 et 28 pourrait être fixée par paraffinage.FIG. 7 shows an installation making it possible to fix the two strips 2 7, 28 simultaneously on the strip 2. It goes without saying, however, that only one of the two strips 27 and 28 could be fixed by waxing.

Pour réaliser les nappes multicouches 1 représentées sur la figure 1, on procède de la façon suivante :

  • - on réalise dans la bande 2, au moyen d'une presse ou d'un outil de découpe rotatif, les trous 3 destinés à former les orifices des opercules 7, et les trous 9 lorsque ceux-ci sont nécessaires ;
  • - on ménage les zones de non adhérence en imprimant un vernis ou une encre sur l'une des faces de la bande perforée 2, à l'aide d'une imprimeuse hélio ou flexo. Dans le cas où le revêtement 4 serait transparent, l'imprimeuse pourrait également être utilisée pour. réaliser des impressions décoratives ou publicitaires telles que celles représentées en 31 sur les figures 8 et 9 ; et
  • - on applique les revêtements 4, 5 sur les deux faces de la bande perforée :
    • . par extrusion-lamination, comme représenté sur les figures 2 et 3 ;
    • . par extrusion-sandwich, comme représenté sur la figure 5 ; ou
    • . par contre-collage, comme représenté sur la figure 6 ; ou
    • . par paraffinage, comme représenté sur la figure 7.
To make the multilayer plies 1 shown in FIG. 1, the procedure is as follows:
  • - In the strip 2, the holes 3 intended to form the orifices of the lids 7, and the holes 9 when these are necessary are produced in the strip 2, by means of a press or a rotary cutting tool;
  • - The areas of non-adhesion are cleaned by printing a varnish or an ink on one of the faces of the perforated strip 2, using a gravure or flexo printer. In case the coating 4 is transparent, the printer could also be used for. make decorative or advertising prints such as those shown at 31 in Figures 8 and 9; and
  • - the coatings 4, 5 are applied to the two faces of the perforated strip:
    • . by extrusion-lamination, as shown in Figures 2 and 3;
    • . by sandwich extrusion, as shown in Figure 5; or
    • . by lamination, as shown in Figure 6; or
    • . by waxing, as shown in FIG. 7.

La technique utilisée pour appliquer le revêtement 4 pourrait bien entendu être différente de celle utilisée pour appliquer le revêtement 5.The technique used to apply the coating 4 could of course be different from that used to apply the coating 5.

Les nappes multicouches 1 sont livrées en bobine aux industriels procédant au conditionnement de produits tels que des boissons ou des yaourts.The multi-layer tablecloths 1 are supplied on a reel to manufacturers processing products such as drinks or yoghurts.

Pour conditionner ces produits, ces industriels fabriquent des récipients du type de ceux représentés en 32 sur les figures 8 à 10, généralement par thermoformage d'une bande de matière plastique, remplissent ensuite les récipients 32 avec le produit, fixent la nappe multicouche 1 ou 1a (avec le revêtement 4 tourné vers le haut) par thermoscellage, sertissage ou soudage par ultra-sons le long de l'entrée des récipients, et découpent la nappe 1 ou la le long des lignes 6 visibles sur la figure 1, qui correspondent au contour extérieur de l'ouverture des récipients (et à celui des languettes 9 dans le cas de la nappe 1a).To package these products, these manufacturers manufacture containers of the type of those shown at 32 in FIGS. 8 to 10, generally by thermoforming a strip of plastic material, then fill the containers 32 with the product, fix the multilayer sheet 1 or 1a (with the coating 4 facing upwards) by heat-sealing, crimping or ultrasonic welding along the entry of the containers, and cut the sheet 1 or along the lines 6 visible in FIG. 1, which correspond to the outer contour of the container opening (and to that of the tabs 9 in the case of the sheet 1a).

Pour ouvrir un récipient tel que celui représenté sur la figure 8, l'opérateur soulève légèrement la partie du revêtement 4 qui surplombe la zone de non adhérence 8, saisit cette partie et la tire vers le haut jusqu'à ce que la partie du revêtement 5 se trouvant dans le trou 3 soit arrachée comme représenté sur la figure 9.To open a container such as that shown in FIG. 8, the operator slightly lifts the part of the coating 4 which overhangs the non-adhesion zone 8, grasps this part and pulls it up until the part of the coating 5 located in the hole 3 is torn off as shown in FIG. 9.

Dans tous ce qui précède, on a supposé que le revêtement 4 était entièrement pelable. Il va de soi cependant qu'un promoteur d'adhérence pourrait être appliqué sur la bande 2 par impression hélio ou flexo, préalablement à l'application du revêtement 4, afin d'empêcher que celui-ci se sépare de la bande 2 lorsque le trou 3 est complètement découvert.In all of the above, it has been assumed that the coating 4 is entirely peelable. It goes without saying, however, that an adhesion promoter could be applied to the strip 2 by gravure or flexo printing, prior to the application of the coating 4, in order to prevent it from separating from the strip 2 when the hole 3 is completely uncovered.

On précisera par ailleurs que les nappes 1 ou 1a pourraient être portées pen- dans quelques minutes à une température supérieure à 100° C afin de les rendre stériles et de permettre le conditionnement des produits dans des conditions parfaitement aseptiques.It will further be specified that the sheets 1 or 1a could be brought down for a few minutes to a temperature above 100 ° C. in order to make them sterile and to allow the packaging of the products under perfectly aseptic conditions.

Enfin, en se référant maintenant à la figure 10, on voit que la partie de la nappe 1, qui correspond à l'un des trous 9 de la bande 2, constitue une languette de préhension que le consommateur peut aisément saisir pour séparer le revêtement 4 de la bande 2 et arracher la partie du revêtement 5 se trouvant dans le trou 3.Finally, now referring to FIG. 10, it can be seen that the part of the ply 1, which corresponds to one of the holes 9 in the strip 2, constitutes a gripping tab which the consumer can easily grasp to separate the coating. 4 of the strip 2 and tear off the part of the covering 5 located in the hole 3.

Il va de soi que la présente invention concerne également les opercules obtenus par la mise en oeuvre du procédé décrit ci-dessus, ainsi que les récipients obturés par de tels opercules.It goes without saying that the present invention also relates to the lids obtained by the implementation of the method described above, as well as the containers closed by such lids.

Claims (15)

1. Procédé de fabrication d'opercules destinés à fermer des récipients à ouverture par pelage, ces opercules étant du type comportant un orifice et deux éléments de fermeture disposés de part et d'autre de l'orifice qu'ils obturent et dans lequel ils adhèrent l'un à l'autre, caractérisé en ce qu'il consiste : - à réaliser dans une bande (2) une série de trous (3) destinés à constituer les orifices des opercules ; - à appliquer sur l'une des faces de la bande perforée (2) un premier revêtement continu (4) destiné à constituer l'un des deux éléments de fermeture, ce premier revêtement étant susceptible d'être séparé au moins partiellement de la bande (2) par pelage ; - à appliquer sur l'autre face de la bande perforée (2) un second revêtement continu (5) de manière à ce qu'il vienne en contact avec les parties du premier revêtement (4) qui sont délimitées par les trous (3) et adhère fortement à ces parties ainsi qu'à la bande perforée (2), ce second revêtement (5) étant destiné à constituer l'autre élément de fermeture ; et - à découper la nappe multicouche (1) ainsi formée de telle sorte que les trous (3) soient tous situés dans un opercule (7). 1. Method for manufacturing lids intended for closing receptacles with peeling openings, these lids being of the type comprising an orifice and two closing elements arranged on either side of the orifice which they seal and in which they adhere to each other, characterized in that it consists: - To produce in a strip (2) a series of holes (3) intended to constitute the orifices of the lids; - To apply on one of the faces of the perforated strip (2) a first continuous coating (4) intended to constitute one of the two closing elements, this first coating being capable of being separated at least partially from the strip (2) by peeling; - applying a second continuous coating (5) to the other face of the perforated strip (2) so that it comes into contact with the parts of the first coating (4) which are delimited by the holes (3) and strongly adheres to these parts as well as to the perforated strip (2), this second coating (5) being intended to constitute the other closing element; and - cutting the multi-layer sheet (1) thus formed so that the holes (3) are all located in a cover (7). 2. Procédé selon la revendication 1, caractérisé en ce qu'on applique l'un au moins des premier et second revêtements (4, 5) sur la bande perforée (2) par extrusion-lamination, contre-collage ou paraffinage .2. Method according to claim 1, characterized in that at least one of the first and second coatings (4, 5) is applied to the perforated strip (2) by extrusion-lamination, laminating or waxing. 3. Procédé selon la revendication 1, caractérisé en ce qu'on applique l'un au moins des premier et second revêtements (4, 5) par extrusion-sandwich entre la bande perforée (2) et une bande supplémentaire (15 ; 20 ; 27, 28).3. Method according to claim 1, characterized in that at least one of the first and second coatings (4, 5) is applied by sandwich extrusion between the perforated strip (2) and an additional strip (15; 20; 27, 28). 4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'on réalise des amorces d'ouvertures (8, 9) entre la bande perforée (2) et le premier revêtement (4), dans des zones situées sur les lignes de découpage (6) de la nappe multicouche (1).4. Method according to any one of claims 1 to 3, characterized in that one initiates openings (8, 9) between the perforated strip (2) and the first coating (4), in areas located on the cutting lines (6) of the multilayer web (1). 5. Procédé selon la revendication 4, caractérisé en ce qu'on réalise les amorces d'ouverture en créant des zones de non adhérence (8) sur la bande (2), préalablement à l'application du premier revêtement (4).5. Method according to claim 4, characterized in that the opening primers are produced by creating non-adhesion zones (8) on the strip (2), prior to the application of the first coating (4). 6. Procédé selon la revendication 5, caractérisé en ce qu'on crée les zones de non adhèrence (8) par application d'un vernis ou d'uneencre sur imprimeuse hélio ou flexo.6. Method according to claim 5, characterized in that the non-adhesion zones are created (8) by application of a varnish or an ink on gravure or flexo printer. 7. Procédé selon la revendication 4, caractérisé en ce qu'on réalise les amorces d'ouverture en exécutant des perforrations supplémentaires (9) dans la bande (2), préalablement à l'application des premier et second revêtements (4, 5).7. Method according to claim 4, characterized in that the opening primers are produced by performing additional perforations (9) in the strip (2), prior to the application of the first and second coatings (4, 5) . 8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la bande (2) a une épaisseur de l'ordre 15 à 200 microns (1,5 à 20.10-5m) et est réalisée en aluminium, en alliage d'aluminium, en chlorure de polyvinyle, en polyester, en polypropylène, en polyéthylène, en polybutylène,en polyamide ou en papier.8. Method according to any one of the preceding claims, characterized in that the strip (2) has a thickness of the order of 15 to 200 microns (1.5 to 20.10 -5 m) and is made of aluminum, an alloy aluminum, polyvinyl chloride, polyester, polypropylene, polyethylene, polybutylene, polyamide or paper. 9. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que les premier et second revêtement (4, 5) ont une épaisseur de l'ordre de 10 à 100 microns (1 à 10.10 5m) et sont réalisés en polyester, en polypropylène, en polyéthylène, en polybutylène, en polyamide, en copolymère éthylène-acide acrylique, ou en résine ionomère.9. Method according to any one of the preceding claims, characterized in that the first and second coating (4, 5) have a thickness of the order of 10 to 100 microns (1 to 10.10 5m) and are made of polyester, polypropylene, polyethylene, polybutylene, polyamide, ethylene-acrylic acid copolymer, or ionomer resin. 10. Procédé selon l'une quelconque des revendications 3 à 9, caractérisé en ce que la bande supplémentaire (15 ; 20 28, 29) est en aluminium et est revêtue sur sa face externe d'une couche en polyester, polypropylène, en polyéthylène, en polybutylène, en polyamide, en copolymère éthylène-acide acrylique, en résine ionomère ou en vernis thermocollant.10. Method according to any one of claims 3 to 9, characterized in that the additional strip (15; 20 28, 29) is made of aluminum and is coated on its outer face with a layer of polyester, polypropylene, polyethylene , polybutylene, polyamide, ethylene-acrylic acid copolymer, ionomer resin or iron-on varnish. 11. Procédé selon l'une quelconque des revendications 3 à 10, caractérisé en ce que la bande supplémentaire (15 ; 20 ; 28, 29) est séparable par pelage.11. Method according to any one of claims 3 to 10, characterized in that the additional strip (15; 20; 28, 29) is separable by peeling. 12. Procédé selon la revendication 11, caractérisé en ce qu'on sépare la bande supplémentaire (15 ; 20 ; 28,29) dans une enceinte stérile, préalablement à la fixation des opercules (7) sur les récipients (32).12. Method according to claim 11, characterized in that the additional strip is separated (15; 20; 28,29) in a sterile enclosure, prior to the fixing of the lids (7) on the containers (32). 13. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'on réalise des impressions (31)sur la bande perforée (2), avant d'appliquer le premier revêtement (4) quand celui-ci est transparent.13. Method according to any one of the preceding claims, characterized in that impressions are made (31) on the perforated strip (2), before applying the first coating (4) when the latter is transparent. 14. Opercules obtenus par mise en oeuvre du procédé selon l'une quelconque des revendications précédentes.14. Lids obtained by implementing the method according to any one of the preceding claims. 15. Récipient à ouverture par pelage obturé par un opercule selon la revendication 14.15. A container with a peel opening closed with a cover according to claim 14.
EP84401674A 1983-08-24 1984-08-16 Manufacturing process for container lids to be opened by peeling, and lids obtained by the realisation of this method Expired EP0135431B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84401674T ATE24697T1 (en) 1983-08-24 1984-08-16 PROCESS FOR MANUFACTURE OF CONTAINER CLOSURES, TO BE OPENED BY PEELING, AND CLOSURES OBTAINED BY USING THIS PROCESS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8313639 1983-08-24
FR8313639A FR2551031B1 (en) 1983-08-24 1983-08-24 CONTAINER WITH PELING OPENING AND PROCESS FOR PRODUCING CLOSING ELEMENTS OF SUCH CONTAINERS

Publications (2)

Publication Number Publication Date
EP0135431A1 true EP0135431A1 (en) 1985-03-27
EP0135431B1 EP0135431B1 (en) 1987-01-07

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US (1) US4636273A (en)
EP (1) EP0135431B1 (en)
JP (1) JPS60110653A (en)
AT (1) ATE24697T1 (en)
AU (1) AU564653B2 (en)
CA (1) CA1225268A (en)
DE (1) DE3461910D1 (en)
ES (1) ES8505307A1 (en)
FR (1) FR2551031B1 (en)
MY (1) MY100198A (en)
SG (1) SG69187G (en)

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EP0292386A2 (en) * 1987-05-20 1988-11-23 Societe Alsacienne D'aluminium Cover for closing a container, comprising a sealing area of thermoplastic material, and process for the manufacture of this cover
US4934544A (en) * 1989-02-27 1990-06-19 Minnesota Mining And Manufacturing Company Z-tab innerseal for a container and method of application
US4961986A (en) * 1987-09-09 1990-10-09 Stanpac Inc. Sealing member for a container
US5004111A (en) * 1989-02-27 1991-04-02 Minnesota Mining & Manufacturing Company Internally delaminating tabbed innerseal for a container and method of applying
US5217790A (en) * 1987-09-09 1993-06-08 Stanpac Inc. Elongate strip for the production of sealing members for containers
US5261990A (en) * 1987-09-09 1993-11-16 Stanpac Inc. Method of making an elongate strip for the production of sealing members for containers
FR2716442A1 (en) * 1994-02-23 1995-08-25 Lawson Mardon Trentesaux Sa Multilayer structure, intended in particular for making caps for closing containers.
US5560989A (en) * 1992-06-05 1996-10-01 Minnesota Mining And Manufacturing Company Multilayer innerseal facing
WO1996030279A1 (en) * 1995-03-24 1996-10-03 Tscheulin-Rothal Gmbh Method of closing off the mouth of a container, a container with a closure of this kind and a material for manufacturing the closure
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US10150590B2 (en) 2013-03-15 2018-12-11 Selig Sealing Products, Inc. Inner seal with a sub tab layer
US10196174B2 (en) 2012-09-05 2019-02-05 Selig Sealing Products, Inc. Tamper evident tabbed sealing member having a foamed polymer layer
US10556732B2 (en) 2015-03-03 2020-02-11 Selig Sealing Products, Inc. Tabbed seal concepts
US10604315B2 (en) 2014-02-05 2020-03-31 Selig Sealing Products, Inc. Dual aluminum tamper indicating tabbed sealing member
US10899506B2 (en) 2016-10-28 2021-01-26 Selig Sealing Products, Inc. Single aluminum tamper indicating tabbed sealing member
US10934069B2 (en) 2016-10-28 2021-03-02 Selig Sealing Products, Inc. Sealing member for use with fat containing compositions
US11254481B2 (en) 2018-09-11 2022-02-22 Selig Sealing Products, Inc. Enhancements for tabbed seal
US11708198B2 (en) 2018-07-09 2023-07-25 Selig Sealing Products, Inc. Grip enhancements for tabbed seal
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Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61287571A (en) * 1985-06-04 1986-12-17 東洋アルミニウム株式会社 Partially tearable sealed vessel
EP0221843A1 (en) * 1985-10-04 1987-05-13 Alcan Rorschach AG Lid made of laminate with an opening closed by a strip member,and method for making it
EP0292386A2 (en) * 1987-05-20 1988-11-23 Societe Alsacienne D'aluminium Cover for closing a container, comprising a sealing area of thermoplastic material, and process for the manufacture of this cover
FR2615488A1 (en) * 1987-05-20 1988-11-25 Aluminium Societe Alsacienne OPERATOR FOR CLOSING A CONTAINER COMPRISING A THERMOPLASTIC SEALING AREA, AND METHOD FOR MANUFACTURING THE SAME
EP0292386A3 (en) * 1987-05-20 1989-01-11 Societe Alsacienne D'aluminium Cover for closing a container, comprising a sealing area of thermoplastic material, and process for the manufacture of this cover
US4961986A (en) * 1987-09-09 1990-10-09 Stanpac Inc. Sealing member for a container
US5217790A (en) * 1987-09-09 1993-06-08 Stanpac Inc. Elongate strip for the production of sealing members for containers
US5261990A (en) * 1987-09-09 1993-11-16 Stanpac Inc. Method of making an elongate strip for the production of sealing members for containers
US5433992A (en) * 1987-09-09 1995-07-18 Stanpac Inc. Sealing member for a container
US4934544A (en) * 1989-02-27 1990-06-19 Minnesota Mining And Manufacturing Company Z-tab innerseal for a container and method of application
US5004111A (en) * 1989-02-27 1991-04-02 Minnesota Mining & Manufacturing Company Internally delaminating tabbed innerseal for a container and method of applying
US5560989A (en) * 1992-06-05 1996-10-01 Minnesota Mining And Manufacturing Company Multilayer innerseal facing
FR2716442A1 (en) * 1994-02-23 1995-08-25 Lawson Mardon Trentesaux Sa Multilayer structure, intended in particular for making caps for closing containers.
EP0669206A1 (en) * 1994-02-23 1995-08-30 Lawson Mardon Trentesaux S.A. Laminate for the production of lids to close receptacles
US5887747A (en) * 1995-03-24 1999-03-30 Tscheulin-Rothal Gmbh Method of closing off the mouth of a container, a container with a closure of this kind and a material for manufacturing the closure
WO1996030279A1 (en) * 1995-03-24 1996-10-03 Tscheulin-Rothal Gmbh Method of closing off the mouth of a container, a container with a closure of this kind and a material for manufacturing the closure
FR2734243A1 (en) * 1995-05-16 1996-11-22 Alsacienne Aluminium Peelable composite band for making lids for thermoplastic containers
WO2009124546A1 (en) * 2008-04-09 2009-10-15 Lars Henriksen A lidding system and lids for plastic or metal containers
EA018215B1 (en) * 2008-04-09 2013-06-28 Ларс Хенриксен A lidding system and lids for plastic or metal containers
US8833043B2 (en) 2008-04-09 2014-09-16 Lars Henriksen Lidding system and lids for plastic or metal containers
US10196174B2 (en) 2012-09-05 2019-02-05 Selig Sealing Products, Inc. Tamper evident tabbed sealing member having a foamed polymer layer
US10954032B2 (en) 2012-09-05 2021-03-23 Selig Sealing Products, Inc. Tamper evident tabbed sealing member having a foamed polymer layer
US10150590B2 (en) 2013-03-15 2018-12-11 Selig Sealing Products, Inc. Inner seal with a sub tab layer
US10150589B2 (en) 2013-03-15 2018-12-11 Selig Sealing Products, Inc. Inner seal with a sub tab layer
EP3022121A4 (en) * 2013-07-16 2017-02-22 Selig Sealing Products, Inc. Container inner seal with a releasable panel
US10604315B2 (en) 2014-02-05 2020-03-31 Selig Sealing Products, Inc. Dual aluminum tamper indicating tabbed sealing member
US10556732B2 (en) 2015-03-03 2020-02-11 Selig Sealing Products, Inc. Tabbed seal concepts
US11059644B2 (en) 2015-03-03 2021-07-13 Selig Sealing Products, Inc. Tabbed seal concepts
US10899506B2 (en) 2016-10-28 2021-01-26 Selig Sealing Products, Inc. Single aluminum tamper indicating tabbed sealing member
US10934069B2 (en) 2016-10-28 2021-03-02 Selig Sealing Products, Inc. Sealing member for use with fat containing compositions
US11401080B2 (en) 2016-10-28 2022-08-02 Selig Sealing Products, Inc. Single aluminum tamper indicating tabbed sealing member
US11866242B2 (en) 2016-10-31 2024-01-09 Selig Sealing Products, Inc. Tabbed inner seal
US11708198B2 (en) 2018-07-09 2023-07-25 Selig Sealing Products, Inc. Grip enhancements for tabbed seal
US11724863B2 (en) 2018-07-09 2023-08-15 Selig Sealing Products, Inc. Tabbed seal with oversized tab
US11254481B2 (en) 2018-09-11 2022-02-22 Selig Sealing Products, Inc. Enhancements for tabbed seal

Also Published As

Publication number Publication date
MY100198A (en) 1990-04-10
JPS60110653A (en) 1985-06-17
ES535348A0 (en) 1985-05-16
AU564653B2 (en) 1987-08-20
US4636273A (en) 1987-01-13
ES8505307A1 (en) 1985-05-16
DE3461910D1 (en) 1987-02-12
ATE24697T1 (en) 1987-01-15
SG69187G (en) 1988-02-19
AU3234084A (en) 1985-02-28
FR2551031A1 (en) 1985-03-01
JPS6212099B2 (en) 1987-03-17
FR2551031B1 (en) 1986-07-04
CA1225268A (en) 1987-08-11
EP0135431B1 (en) 1987-01-07

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