EP2108506A2 - Double-wall cup - Google Patents

Double-wall cup Download PDF

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Publication number
EP2108506A2
EP2108506A2 EP09002098A EP09002098A EP2108506A2 EP 2108506 A2 EP2108506 A2 EP 2108506A2 EP 09002098 A EP09002098 A EP 09002098A EP 09002098 A EP09002098 A EP 09002098A EP 2108506 A2 EP2108506 A2 EP 2108506A2
Authority
EP
European Patent Office
Prior art keywords
blank
cup
sleeve
adhesive
outer shell
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
EP09002098A
Other languages
German (de)
French (fr)
Other versions
EP2108506B1 (en
EP2108506A3 (en
Inventor
Werner Stahlecker
Holger Aubele
Uwe Messerschmid
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.)
PTM Packaging Tools Machinery Pte Ltd
Original Assignee
PTM Packaging Tools Machinery Pte Ltd
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 PTM Packaging Tools Machinery Pte Ltd filed Critical PTM Packaging Tools Machinery Pte Ltd
Publication of EP2108506A2 publication Critical patent/EP2108506A2/en
Publication of EP2108506A3 publication Critical patent/EP2108506A3/en
Application granted granted Critical
Publication of EP2108506B1 publication Critical patent/EP2108506B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B65D81/3865—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation drinking cups or like containers
    • B65D81/3869—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation drinking cups or like containers formed with double walls, i.e. hollow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/60—Uniting opposed surfaces or edges; Taping
    • B31B50/62—Uniting opposed surfaces or edges; Taping by adhesives
    • B31B50/624—Applying glue on blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2105/00—Rigid or semi-rigid containers made by assembling separate sheets, blanks or webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2105/00—Rigid or semi-rigid containers made by assembling separate sheets, blanks or webs
    • B31B2105/002—Making boxes characterised by the shape of the blanks from which they are formed
    • B31B2105/0022—Making boxes from tubular webs or blanks, e.g. with separate bottoms, including tube or bottom forming operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2110/00—Shape of rigid or semi-rigid containers
    • B31B2110/10—Shape of rigid or semi-rigid containers having a cross section of varying size or shape, e.g. conical or pyramidal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2120/00—Construction of rigid or semi-rigid containers
    • B31B2120/50—Construction of rigid or semi-rigid containers covered or externally reinforced
    • B31B2120/501—Construction of rigid or semi-rigid containers covered or externally reinforced by applying wrapping material only on the side wall part of a box
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/26—Folding sheets, blanks or webs
    • B31B50/28—Folding sheets, blanks or webs around mandrels, e.g. for forming bottoms

Definitions

  • the invention relates to a method for producing a double-walled cup in which a sleeve-shaped outer shell made of a paper material on a prefabricated inner cup is axially slid and fixed, wherein the sleeve-shaped outer shell is formed before pushing from a flat blank by connecting the ends of the blank, and wherein the ends of the blank are joined by an adhesive applied in limited areas of the outer shell.
  • the invention further relates to a cup produced by this method.
  • a method of this kind is by the DE 198 40 841 A1 State of the art.
  • a cold glue is applied as an adhesive in a limited area.
  • the ends of the blank are glued together to form a sleeve.
  • This sleeve is pushed as an outer jacket onto a prefabricated inner cup. Due to the stability of the sleeve-shaped prefabricated outer sheath, a substantially annular air space can be formed between the outer sheath and the inner sheath of the cup, wherein outer sheath and inner sheath do not touch along the air space.
  • the thickness of the substantially annular air space can be increased by a sudden expansion in the upper region of the inner shell, so that the insulating effect of the cup is improved.
  • the outer shell can be made from a very inexpensive paper material.
  • the blanks for the outer jacket may consist of single-layer paper material without additional plastic coating.
  • the outer casing does not come into contact with the liquid to be filled. So it's one uncoated paper material sufficient to achieve the insulating effect of the double-walled cup.
  • the gluing of the ends of the blank with cold glue limits the operating speed of the manufacturing device, since the cold glue takes a relatively long time until it sets. The ends of the blank must therefore remain compressed relatively long, so that the adhesive bond does not dissolve again immediately.
  • the processing of cold glue is expensive, since cold glue often has viscosity fluctuations, which prevent precise metering of the applied amount of glue. Excessive application of glue causes contamination of the production machine, so that the machine often has to be shut down for cleaning.
  • the invention has for its object to provide an improved method for producing a double-walled cup.
  • thermoplastic material is used as an adhesive when connecting the ends of the blank to a tubular outer shell.
  • thermoplastic material such as a hot melt adhesive or a so-called hot melt
  • a hot melt adhesive can be applied very precisely with defined viscosity in limited areas of the outer shell and binds when compressing the ends very quickly.
  • the speed in the production of the double-walled cup can be greatly increased.
  • the manufacturing machine is not contaminated by imprecise dosed adhesive, so that the frequent cleaning work accounts.
  • the hot melt adhesive is applied to limited areas of the blank in liquid form prior to joining the ends of the blank into a tubular outer shell. The ends of the blank need only be compressed for a very short time to be securely and stably glued.
  • a sealing wax can also be used as the thermoplastic material.
  • the sealing lacquer can be applied to the flattened blank in a step which precedes the actual production process of the double-walled cup or at least in a step upstream of the shaping of the outer casing.
  • the sealing lacquer may be applied in the form of a strip to one end of the blank before the blank is fed to the double-walled cup making machine.
  • the application of the sealing wax can be done for example in a printing press. The sealing wax is thus on the flat blank already solidifies and does not hinder the feeding of the blank in the Becherherstellmaschine.
  • the sealing wax When connecting the ends of the blank to the sleeve-shaped outer jacket, the sealing wax is reheated so that the ends are glued together after brief juxtaposition.
  • Applying sealing wax prior to feeding the blanks for the outer shell in the Becherherstellmaschine has the great advantage that in the Becherherstellmaschine no applicators and metering devices for adhesive must be present. Any contamination of the Becherherstellmaschine by adhesive can be effectively prevented.
  • the sealing wax can be applied very sparingly in limited areas of the outer shell, where it is needed for connection.
  • the attachment of the sleeve-shaped outer jacket to the inner cup can also be effected by a thermoplastic material as an adhesive. For this purpose, a strip of sealing wax can be applied along an arcuately curved edge of the blank.
  • sealing wax as a thermoplastic material for bonding the outer shell
  • devices for joining the ends of the blank can be used, as are similarly used for joining the inner shell in the manufacture of the inner cup.
  • the blanks for the outer jacket with the sealing lacquer printed in the limited areas can in principle be processed in the same way as the polyethylene film-coated blanks for the inner cup.
  • Such sealing devices are known per se, so that a detailed description is omitted here.
  • the inner cup can be designed as desired per se.
  • it can consist of a paper material.
  • the inner cup can also be a plastic cup.
  • the outer sheath different configurations are possible.
  • the outer jacket may for example consist of a smooth paper material or of a corrugated paper material.
  • thermoplastic material as an adhesive for the sleeve-shaped outer jacket is particularly advantageous when the inner cup has a sudden diameter change in the form of a shoulder in the upper region of the inner jacket.
  • the sudden expansion is located just below a mouth roll of the inner cup, so that a narrow area for fixing the outer shell remains between the expansion and the mouth roll.
  • This area for fixing the outer shell is usually above the level of the hot liquid to be filled into the cup.
  • Below the abrupt change in diameter there is a substantially annular air space between the outer jacket and the inner jacket, along which outer jacket and inner jacket do not touch.
  • connection point extending in the cup longitudinal axis of the ends of the blank of the sleeve-shaped outer sheath is also spaced from the inner sheath in contact with the hot liquid by this air space.
  • thermoplastic material compounds on the outer shell dissolve again by the filling of hot liquid in the double-walled cup.
  • EP 1 785 370 A1 describes the use of a hot melt adhesive for provisionally securing an outer jacket to an inner cup.
  • the outer sheath is not glued to a sleeve, but wound directly around the sheath of the inner cup and glued there.
  • a cold glue is applied to the outer jacket in addition to the hotmelt adhesive.
  • the disadvantages of using cold glue have already been described above.
  • the cold glue is in the execution of EP 1 785 370 A1 necessary, because the connection made by the hot melt adhesive between the inner shell and the outer shell during the filling of hot liquid in the cup can solve again and there is a risk that the outer shell by the residual stress of the paper material jumps up and falls from the inner cup.
  • the in FIG. 1 shown double-walled cup 1 consists essentially of an inner cup 2 with a fillable interior 3 and an outer shell 4.
  • the fillable interior 3 of the inner cup 2 is formed by a conical inner shell 5 and a cup-shaped bottom 6.
  • the open side of the cup-shaped bottom 6 is arranged so that it faces away from the filling opening of the cup 1.
  • the bottom 6 is connected with its wall in the region of the smaller circumference of the inner shell 5 liquid-tight with this by a frame 7.
  • the material of the inner shell 5 is wrapped around the wall of the bottom 6 and hammered inwards.
  • the inner shell 5 has at its upper edge, ie in the region of the larger circumference, an outwardly beaded mouth roll 8, which surrounds the filling opening.
  • the property "conical” of the inner shell 5 is understood to mean that the inner shell 5 in the in FIG. 1 shown longitudinal section of the mouth roll 8 tapers to the bottom 6. It is irrelevant which shape of the inner shell 5 has in cross section.
  • the inner shell 5 may be circular in cross section, for example, oval or rectangular with rounded corners.
  • the inner cup has a truncated cone-like shape, while in the case of a rectangular cross-section it has a more truncated pyramidal shape.
  • the frame 7 may preferably have an outwardly projecting widening 9 at least in a region along its circumference.
  • the widening 9 may alternatively extend only over a lower portion of the frame 7.
  • a lower edge of the widening 9 on the frame 7 forms a base for the cup 1.
  • the cup is in use on its footprint, which is increased by the expansion 9. As a result, tilting of the cup 1 is difficult.
  • the expansion 9 is preferably designed circumferentially along the circumference of the frame 7.
  • the frame 7 is a very important element of the cup 1.
  • the frame 7 is necessary for the connection between the inner shell 5 and the bottom 6.
  • the material of the bottom 6 is with the material of the inner shell 5 in the region of the frame 7 glued or sealed to be liquid-tight at least for a certain period of time.
  • the term "paper material" from which the bottom 6 and the inner shell 5 is made can be understood to mean different materials which have at least one layer of paper, paperboard or cardboard.
  • the material may comprise one or more layers of plastic and / or aluminum.
  • the paper material is on the side bounding the interior 3 with a thin plastic layer, preferably made of polyethylene, coated.
  • the frame 7 is an essential design feature that can not be waived.
  • the inner shell 5 may advantageously have a sudden change in size in the form of a shoulder 10 in the area below the mouth roll 8, which is seen from the bottom 6 to the mouth roll 8 as a sudden cross-sectional widening. Between the mouth roll 8 and the shoulder 10 is located on the outer surface of the inner shell 5, a contact surface 11 for the outer shell. 4
  • a bead 12 can be formed in the inner casing 5 as a means for stacking, on which the widening 9 of the frame 7 of a similar cup 1 to be inserted into the inner space 3 is stacked. It is thereby prevented that the stacked cups 1 wedged into each other.
  • the outer jacket 4 can be designed differently. Two possible designs of the outer shell 4 are in the FIGS. 3A and 3B shown. In FIG. 3A is to recognize a smooth outer shell 4, which surrounds the inner shell 5 at a uniform distance. In FIG. 3B a corrugated outer shell 4 is shown. The substantially annular air space 13 thereby has an alternating width. Depending on the requirements, it may be provided that the regions of the outer jacket 4 closest to the inner jacket 5 still have a small distance from the inner jacket 5 or, alternatively, contact the inner jacket 5, so that the outer jacket 4 is supported on the inner cup 2 and improved stability of the double-walled jacket Bechers 1 is created.
  • a prefabricated inner cup 2 is used in a manner known per se.
  • This prefabricated inner cup 2 is connected to a sleeve-shaped outer casing 4, so that a substantially annular air space 13 is formed between the outer casing 4 and the inner casing 5 of the cup 1, along which outer casing 4 and inner casing 5 do not touch.
  • the widening 9 can be formed before or after pushing on the outer jacket 4.
  • the air space 13 has a good insulation effect, so that the double-walled cup 1 can be easily held in the hand even with a filled in the interior 3 very hot liquid.
  • an inwardly directed curl 14 is provided, with which the outer shell 4 is supported on the inner cup 2.
  • the blank 15 has approximately the shape of a segment of a circular ring with two arcuate edges 16 and 17 and two straight ends 17 and 18.
  • the blank 15 for the outer shell 4 consists of an uncoated paper material, because the outer shell does not come into contact with the liquid to be filled when using the cup 1.
  • the double-walled cup 1 is commonly used as a disposable cup for hot drinks and disposed of after a single use. The less plastic the cup 1 contains, the better the paper material is recyclable.
  • the blank 15 is wound around a conical mandrel and the end 18 is connected in an overlapping manner to the end 19.
  • a thermoplastic material is applied to the end 18 in a limited area as an adhesive.
  • the limited area at the end 18 of the blank 15, in which the thermoplastic material is applied as an adhesive, is in FIG. 2 characterized by the hatching provided with the reference numeral 20.
  • thermoplastic material for joining the ends 18 and 19 of the blank 15 to the tubular outer shell 4
  • two different thermoplastic materials are particularly suitable as an adhesive.
  • a hot melt adhesive is applied in liquid form prior to joining the ends 18 and 19 to the limited area 20 of the blank 15.
  • a metering device can be provided which applies the hotmelt adhesive to the blank 15 through a nozzle at a defined temperature.
  • the end 19 is placed over the area 20 at the end 18 and pressed it. In this case, the hot melt adhesive cools down and the ends 18 and 19 are securely connected to each other within a very short time.
  • a sealing wax can be used as a thermoplastic material.
  • the sealing wax is printed with a printing press on the flat blank 15 in area 20 and solidifies there.
  • Prefabricated blanks 15 with the applied sealing wax in the area 20 can then in the production of the double-walled Bechers 1 are processed in the Becherherstellmaschine without in the Becherherstellmaschine another adhesive application is required.
  • the blank 15 with the previously applied sealing wax in the region 20 is wound around a mandrel, wherein the end 19 is placed over the region 20 at the end 18. Under brief heat, the ends 18 and 19 pressed against each other, so that the sealing wax is reheated, and thereby the end 19 bonded to the end 18.
  • the inwardly directed curl 14 is formed at the arcuate edge 17, and the sleeve-shaped outer shell 4 is removed from the mandrel. Subsequently, the sleeve-shaped outer jacket 4 is pushed in the axial direction onto the prefabricated inner cup 2 from below and fastened to the inner cup 2. The attachment of the outer shell 4 on the inner cup 2 is effected in that a region at the upper edge 16 of the outer shell 4 rests against the contact surface 11 of the inner shell 5.
  • the attachment of the sleeve-shaped outer sheath 4 on the inner cup 2 can also be carried out differently.
  • the hotmelt adhesive is either applied in liquid form to the outer shell 4 in the region of the upper edge 16 or applied to the contact surface 11 of the inner cup before the outer shell 4 is pushed onto the inner cup 2 from below. After pushing the outer shell 4 on the inner cup 2, the outer shell 4 can be pressed with the inner shell 5 in the area between the shoulder 10 and the mouth roll 8.
  • a limited area 21 is provided on the blank 15 along the arcuate edge 16 analogous to the area 20 at the end 18, is applied in the sealing wax.
  • the area 21 is located after connecting the ends 18 and 19 of the blank on the inside of the sleeve-shaped outer shell 4 and comes after pushing the outer shell 4 in contact with the contact surface 11 of the inner cup 2.
  • the outer jacket 4 and the inner jacket 5 are pressed and sealed in the region 11 with the sealing wax in between under the action of heat.
  • a pressing of the outer shell 4 and the inner shell 5 in the region 11 with the intervening thermoplastic material as an adhesive can be performed differently depending on the requirements.
  • a over the entire circumference of the cup. 1 be continuous pressing, so that a stable connection between outer shell 4 and inner cup 2 is formed.
  • a hotmelt adhesive for example, it may be sufficient to apply it only in a punctiform manner before the outer shell 4 is pushed onto the inner cup 2 from below.
  • sealing wax When sealing wax is used, provision may be made for a sealing lacquer to be applied only in partial regions of the region 21 along the arcuate edge 16 of the blank 15. The amount of thermoplastic material required for the production of the double-walled cup 1 can thereby be minimized.
  • FIGS. 4 to 7 different embodiments of double-walled cups 1 shown.
  • Like reference numerals denote like parts as in FIGS Figures 1 and 2 , The in terms of the Figures 1 and 2 The explanations given apply analogously so that a repeated description can be dispensed with.
  • the outer sheath 4 in the FIGS. 3A and 3B assume variants of a smooth or a wavy shape.
  • FIG. 4 a double-walled cup 1 is shown extending from the cup of FIG. 1 differs in that the frame 7 continues the conical inner shell 5 without widening.
  • the curl 14 of the outer shell 4 is not pressed flat and also supported on the outer circumference of the inner shell 5 from.
  • FIG. 6 a double-walled cup 1 is shown, which has an inner cup 2 made of a plastic material.
  • the inner cup 2 made of plastic material the inner shell 5 and the bottom 6 is integrally molded.
  • the inner cup 2 has the FIG. 6 a flange 22 which is integrally formed on the inner shell 5 at the upper edge.
  • a shoulder 10 is arranged below the flange 22, between the flange 22 and the shoulder 10 is the contact surface 11 for the outer shell. 4
  • FIG. 7 a variant of a double-walled cup 1 is shown, in which the inner cup 2 as the inner cup 2 of the FIG. 6 made of plastic.
  • the inner jacket 5 according to FIG. 7 has between bottom 6 and flange 22 at a constant angle of inclination, which is not interrupted by shoulders or beads.
  • the outer jacket 4 rests against the inner jacket 5 of the inner cup 2 below the flange 22 in the region of a contact surface 11 and with a curl 14 at the lower end of the outer jacket 4.

Abstract

The method involves axially sliding a tube-shaped outer sleeve (4) made of paper material on a prefabricated inner cup and attaching the outer sleeve to the inner cup (2). The tube-shaped outer sleeve is formed from a flat blank by joining ends of the blank, before sliding the sleeve on the inner cup. The ends of the blank are joined together via applying an adhesive to a limited area of the sleeve, where thermoplastic material is used as the adhesive. A hot-melt adhesive and a sealing varnish are used as the thermoplastic material. An independent claim is also included for a double-walled cup comprising an inner cup.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen eines doppelwandigen Bechers bei dem ein hülsenförmiger Außenmantel aus einem Papiermaterial auf einen vorgefertigten Innenbecher axial aufgeschoben und befestigt wird, wobei der hülsenförmige Außenmantel vor dem Aufschieben aus einem flachliegenden Zuschnitt durch Verbinden der Enden des Zuschnitts geformt wird, und wobei die Enden des Zuschnitts durch einen in begrenzten Bereichen des Außenmantels aufgetragenen Klebstoff verbunden werden. Die Erfindung betrifft ferner ein mit diesem Verfahren hergestellten Becher.The invention relates to a method for producing a double-walled cup in which a sleeve-shaped outer shell made of a paper material on a prefabricated inner cup is axially slid and fixed, wherein the sleeve-shaped outer shell is formed before pushing from a flat blank by connecting the ends of the blank, and wherein the ends of the blank are joined by an adhesive applied in limited areas of the outer shell. The invention further relates to a cup produced by this method.

Ein Verfahren dieser Art ist durch die DE 198 40 841 A1 Stand der Technik. Auf einem flachliegenden Zuschnitt wird in einem begrenzten Bereich ein Kaltleim als Klebstoff aufgetragen. Die Enden des Zuschnitts werden zusammengeklebt, so dass eine Hülse entsteht. Diese Hülse wird als Außenmantel auf einen vorgefertigten lnnenbecher aufgeschoben. Durch die Stabilität des hülsenförmig vorgefertigten Außenmantels kann zwischen dem Außenmantel und dem Innenmantel des Bechers einen im Wesentlichen ringförmiger Luftraum gebildet werden, wobei sich Außenmantel und Innenmantel entlang des Luftraumes nicht berühren. Die Dicke des im Wesentlichen ringförmigen Luftraums kann durch eine sprunghafte Aufweitung im oberen Bereich des Innenmantels vergrößert werden, so dass die Isolationswirkung des Bechers verbessert ist.A method of this kind is by the DE 198 40 841 A1 State of the art. On a flat blank, a cold glue is applied as an adhesive in a limited area. The ends of the blank are glued together to form a sleeve. This sleeve is pushed as an outer jacket onto a prefabricated inner cup. Due to the stability of the sleeve-shaped prefabricated outer sheath, a substantially annular air space can be formed between the outer sheath and the inner sheath of the cup, wherein outer sheath and inner sheath do not touch along the air space. The thickness of the substantially annular air space can be increased by a sudden expansion in the upper region of the inner shell, so that the insulating effect of the cup is improved.

Durch die Verwendung von Kaltleim als Klebstoff zum Verbinden der Enden des Zuschnitts des Außenmantels kann der Außenmantel aus einem sehr preisgünstigen Papiermaterial hergestellt werden. Die Zuschnitte für den Außenmantel können aus einschichtigem Papiermaterial ohne zusätzliche Kunststoffbeschichtung bestehen. Im Gegensatz zu dem lnnenbecher dessen Papiermaterial auf der den Innenraum bildenden Seite eine Kunststoffbeschichtung aufweist, kommt der Außenmantel nicht mit der einzufüllenden Flüssigkeit in Kontakt. Es ist also ein unbeschichtetes Papiermaterial ausreichend, um die Isolationswirkung des doppelwandigen Bechers zu erreichen.By using cold glue as an adhesive for bonding the ends of the blank of the outer shell, the outer shell can be made from a very inexpensive paper material. The blanks for the outer jacket may consist of single-layer paper material without additional plastic coating. In contrast to the inner cup whose paper material has a plastic coating on the side forming the interior, the outer casing does not come into contact with the liquid to be filled. So it's one uncoated paper material sufficient to achieve the insulating effect of the double-walled cup.

Das Verkleben der Enden des Zuschnitts mit Kaltleim begrenzt jedoch die Arbeitsgeschwindigkeit der Herstellvorrichtung, da der Kaltleim eine relativ lange Zeit benötigt, bis er abbindet. Die Enden des Zuschnitts müssen deshalb relativ lange zusammengepresst bleiben, damit die Klebeverbindung sich nicht sofort wieder löst. Außerdem ist die Verarbeitung von Kaltleim aufwendig, da Kaltleim häufig Viskositätsschwankungen aufweist, die eine präzise Dosierung der aufgetragenen Leimmenge verhindern. Durch übermäßigen Leimauftrag kommt es zu Verschmutzung der Herstellmaschine, so dass die Maschine zum Reinigen häufig stillgesetzt werden muss.However, the gluing of the ends of the blank with cold glue limits the operating speed of the manufacturing device, since the cold glue takes a relatively long time until it sets. The ends of the blank must therefore remain compressed relatively long, so that the adhesive bond does not dissolve again immediately. In addition, the processing of cold glue is expensive, since cold glue often has viscosity fluctuations, which prevent precise metering of the applied amount of glue. Excessive application of glue causes contamination of the production machine, so that the machine often has to be shut down for cleaning.

Der Erfindung liegt die Aufgabe zugrunde, ein verbessertes Verfahren zum Herstellen eines doppelwandigen Bechers zu schaffen.The invention has for its object to provide an improved method for producing a double-walled cup.

Die Aufgabe wird dadurch gelöst, dass beim Verbinden der Enden des Zuschnitts zu einem hülsenförmigen Außenmantel ein thermoplastisches Material als Klebstoff verwendet wird.The object is achieved in that a thermoplastic material is used as an adhesive when connecting the ends of the blank to a tubular outer shell.

Ein thermoplastisches Material, wie beispielsweise ein Schmelzklebstoff bzw. ein sogenannter Hotmelt, lässt sich mit definierter Viskosität sehr präzise in begrenzten Bereichen des Außenmantels auftragen und bindet beim Zusammenpressen der Enden sehr schnell ab. Hierdurch kann die Geschwindigkeit bei der Herstellung des doppelwandigen Bechers stark erhöht werden. Außerdem wird die Herstellmaschine nicht durch unpräzise dosierten Klebstoff verunreinigt, so dass die häufigen Reinigungsarbeiten entfallen. Der Schmelzklebstoff wird vor dem Verbinden der Enden des Zuschnitts zu einem hülsenförmigen Außenmantel auf begrenzte Bereiche des Zuschnitts in flüssiger Form aufgetragen. Die Enden des Zuschnitts brauchen nur für sehr kurze Zeit zusammengepresst werden, um sicher und stabil verklebt zu sein.A thermoplastic material, such as a hot melt adhesive or a so-called hot melt, can be applied very precisely with defined viscosity in limited areas of the outer shell and binds when compressing the ends very quickly. As a result, the speed in the production of the double-walled cup can be greatly increased. In addition, the manufacturing machine is not contaminated by imprecise dosed adhesive, so that the frequent cleaning work accounts. The hot melt adhesive is applied to limited areas of the blank in liquid form prior to joining the ends of the blank into a tubular outer shell. The ends of the blank need only be compressed for a very short time to be securely and stably glued.

In Ausgestaltung kann als thermoplastisches Material auch ein Siegellack verwendet werden. Der Siegellack kann in einem dem eigentlichen Herstellverfahren des doppelwandigen Bechers oder aber mindestens in einem dem Formen des Außenmantels vorgelagerten Schritt auf den flachliegenden Zuschnitt aufgetragen werden. Der Siegellack kann beispielsweise in Form eines Streifens auf ein Ende des Zuschnitts aufgebracht werden, bevor der Zuschnitt der Herstellmaschine für den doppelwandigen Becher zugeführt wird. Das Aufbringen des Siegellackes kann zum Beispiel in einer Druckmaschine erfolgen. Der Siegellack hat sich somit auf dem flachliegenden Zuschnitt bereits verfestigt und behindert die Zuführung des Zuschnitts in der Becherherstellmaschine nicht. Beim Verbinden der Enden des Zuschnitts zu dem hülsenförmigen Außenmantel wird der Siegellack wieder erwärmt, so dass die Enden nach kurzem Aneinanderpressen miteinander verklebt sind. Ein Aufbringen von Siegellack vor der Zuführung der Zuschnitte für den Außenmantel in die Becherherstellmaschine hat den großen Vorteil, dass in der Becherherstellmaschine keinerlei Auftragseinrichtungen und Dosiereinrichtungen für Klebstoff vorhanden sein müssen. Jegliche Verschmutzung der Becherherstellmaschine durch Klebstoff kann dadurch wirkungsvoll verhindert werden. Der Siegellack kann sehr sparsam in begrenzten Bereichen des Außenmantels, wo er zur Verbindung benötigt wird, aufgetragen werden. Neben den Enden des Zuschnitts kann auch die Befestigung des hülsenförmigen Außenmantels am lnnenbecher durch ein thermoplastisches Material als Klebstoff bewirkt werden. Hierzu kann ein Streifen von Siegellack entlang einer bogenförmig gekrümmte Kante des Zuschnitts aufgebracht sein.In an embodiment, a sealing wax can also be used as the thermoplastic material. The sealing lacquer can be applied to the flattened blank in a step which precedes the actual production process of the double-walled cup or at least in a step upstream of the shaping of the outer casing. For example, the sealing lacquer may be applied in the form of a strip to one end of the blank before the blank is fed to the double-walled cup making machine. The application of the sealing wax can be done for example in a printing press. The sealing wax is thus on the flat blank already solidifies and does not hinder the feeding of the blank in the Becherherstellmaschine. When connecting the ends of the blank to the sleeve-shaped outer jacket, the sealing wax is reheated so that the ends are glued together after brief juxtaposition. Applying sealing wax prior to feeding the blanks for the outer shell in the Becherherstellmaschine has the great advantage that in the Becherherstellmaschine no applicators and metering devices for adhesive must be present. Any contamination of the Becherherstellmaschine by adhesive can be effectively prevented. The sealing wax can be applied very sparingly in limited areas of the outer shell, where it is needed for connection. In addition to the ends of the blank, the attachment of the sleeve-shaped outer jacket to the inner cup can also be effected by a thermoplastic material as an adhesive. For this purpose, a strip of sealing wax can be applied along an arcuately curved edge of the blank.

Ein weiterer Vorteil der Verwendung von Siegellack als thermoplastisches Material zum Verbinden des Außenmantels ist, dass in der Becherherstellmaschine Vorrichtungen zum Verbinden der Enden des Zuschnitts verwendet werden können, wie sie in ähnlicher Weise auch zum Verbinden des Innenmantels bei der Herstellung des lnnenbechers eingesetzt werden. Die Zuschnitte für den Außenmantel mit dem in den begrenzten Bereichen aufgedruckten Siegellack lassen sich im Prinzip genauso verarbeiten, wie die mit Polyethylen-Folie beschichteten Zuschnitte für den lnnenbecher. Derartige Siegel-Vorrichtungen sind an sich bekannt, so dass an dieser Stelle auf eine detaillierte Beschreibung verzichtet wird.Another advantage of using sealing wax as a thermoplastic material for bonding the outer shell is that in the cup making machine, devices for joining the ends of the blank can be used, as are similarly used for joining the inner shell in the manufacture of the inner cup. The blanks for the outer jacket with the sealing lacquer printed in the limited areas can in principle be processed in the same way as the polyethylene film-coated blanks for the inner cup. Such sealing devices are known per se, so that a detailed description is omitted here.

Der lnnenbecher kann an sich beliebig gestaltet sein. Er kann beispielsweise aus einem Papiermaterial bestehen. Der lnnenbecher kann aber auch ein Kunststoffbecher sein. Auch für den Außenmantel sind unterschiedliche Ausgestaltungen möglich. Der Außenmantel kann beispielsweise aus einem glatten Papiermaterial oder auch aus einem gewellten Papiermaterial bestehen.The inner cup can be designed as desired per se. For example, it can consist of a paper material. The inner cup can also be a plastic cup. Also for the outer sheath different configurations are possible. The outer jacket may for example consist of a smooth paper material or of a corrugated paper material.

Die Verwendung eines thermoplastischen Materials als Klebstoff für den hülsenförmigen Außenmantel ist insbesondere dann vorteilhaft, wenn der lnnenbecher eine sprunghafte Durchmesserveränderung in Form einer Schulter im oberen Bereich des Innenmantels aufweist. Die sprunghafte Aufweitung befindet sich dicht unterhalb einer Mundrolle des lnnenbechers, so dass zwischen der Aufweitung und der Mundrolle ein schmaler Bereich zur Befestigung des Außenmantels verbleibt. Dieser Bereich zur Befestigung des Außenmantels liegt üblicherweise oberhalb des Niveaus der in den Becher einzufüllenden heißen Flüssigkeit. Unterhalb der sprunghaften Durchmesser-Veränderung befindet sich zwischen dem Außenmantel und dem Innenmantel ein im wesentlichen ringförmiger Luftraum, entlang dem sich Außenmantel und Innenmantel nicht berühren. Auch die in Becherlängsachse verlaufende Verbindungsstelle der Enden des Zuschnitts des hülsenförmigen Außenmantels ist durch diesen Luftraum von dem mit der heißen Flüssigkeit in Kontakt stehenden Innenmantel beabstandet. Es besteht also keine Gefahr, dass die mit thermoplastischem Material verklebten Verbindungen am Außenmantel sich durch das Einfüllen von heißer Flüssigkeit in den doppelwandigen Becher wieder lösen. Aus der nicht gattungsgemäßen EP 1 785 370 A1 ist die Verwendung eines Schmelzklebstoffs zur vorläufigen Befestigung eines Außenmantels an einem Innenbecher beschrieben. Der Außenmantel wird nicht zu einer Hülse verklebt, sondern direkt um den Mantel des lnnenbechers gewickelt und dort angeklebt. Zur dauerhaften Fixierung wird zusätzlich zu dem Schmelzklebstoff ein Kaltleim auf den Außenmantel aufgetragen. Die Nachteile der Verwendung von Kaltleim wurden oben bereits beschrieben. Der Kaltleim ist bei der Ausführung der EP 1 785 370 A1 notwendig, da sich die durch den Schmelzklebstoff hergestellte Verbindung zwischen dem Innenmantel und dem Außenmantel beim Einfüllen von heißer Flüssigkeit in den Becher wieder lösen kann und die Gefahr besteht, dass der Außenmantel durch die Eigenspannung des Papiermaterials aufspringt und vom lnnenbecher abfällt.The use of a thermoplastic material as an adhesive for the sleeve-shaped outer jacket is particularly advantageous when the inner cup has a sudden diameter change in the form of a shoulder in the upper region of the inner jacket. The sudden expansion is located just below a mouth roll of the inner cup, so that a narrow area for fixing the outer shell remains between the expansion and the mouth roll. This area for fixing the outer shell is usually above the level of the hot liquid to be filled into the cup. Below the abrupt change in diameter, there is a substantially annular air space between the outer jacket and the inner jacket, along which outer jacket and inner jacket do not touch. The connection point extending in the cup longitudinal axis of the ends of the blank of the sleeve-shaped outer sheath is also spaced from the inner sheath in contact with the hot liquid by this air space. Thus, there is no danger that the bonded with thermoplastic material compounds on the outer shell dissolve again by the filling of hot liquid in the double-walled cup. From the non-generic EP 1 785 370 A1 describes the use of a hot melt adhesive for provisionally securing an outer jacket to an inner cup. The outer sheath is not glued to a sleeve, but wound directly around the sheath of the inner cup and glued there. For permanent fixation, a cold glue is applied to the outer jacket in addition to the hotmelt adhesive. The disadvantages of using cold glue have already been described above. The cold glue is in the execution of EP 1 785 370 A1 necessary, because the connection made by the hot melt adhesive between the inner shell and the outer shell during the filling of hot liquid in the cup can solve again and there is a risk that the outer shell by the residual stress of the paper material jumps up and falls from the inner cup.

Weitere Vorteile und Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung einiger Ausführungsbeispiele.Further advantages and features of the invention will become apparent from the following description of some embodiments.

Es zeigen:

  • Figur 1 einen teilweise dargestellten doppelwandigen Becher im Längsschnitt,
  • Figur 2 einen verkleinert dargestellten flachliegenden Zuschnitt für einen hülsenförmigen Außenmantel des doppelwandigen Bechers der Figur 1,
  • Figuren 3A und 3B jeweils eine entlang der Schnittfläche III-III der Figur 1 geschnittene Ansicht,
  • Figuren 4 bis 7 jeweils Ansichten ähnlich Figur 1 auf unterschiedliche Formvarianten des doppelwandigen Bechers.
Show it:
  • FIG. 1 a partially illustrated double-walled cup in longitudinal section,
  • FIG. 2 a reduced flat blank for a sleeve-shaped outer shell of the double-walled cup illustrated FIG. 1 .
  • FIGS. 3A and 3B one along the section III-III of the FIG. 1 cut view,
  • FIGS. 4 to 7 each similar to views FIG. 1 on different shape variants of the double-walled cup.

Der in Figur 1 dargestellte doppelwandige Becher 1 besteht im Wesentlichen aus einem lnnenbecher 2 mit einem befüllbaren Innenraum 3 und einem Außenmantel 4. Der befüllbare Innenraum 3 des Innenbechers 2 wird durch einen konischen Innenmantel 5 und einen topfförmigen Boden 6 gebildet. Die offene Seite des topfförmigen Bodens 6 ist so angeordnet, dass sie von der Füllöffnung des Bechers 1 abgewandt ist. Der Boden 6 ist mit seiner Wandung im Bereich des geringeren Umfangs des Innenmantels 5 flüssigkeitsdicht mit diesem durch eine Zarge 7 verbunden. Im Bereich der Zarge 7 ist das Material des Innenmantels 5 um die Wandung des Bodens 6 herumgelegt und nach innen eingeschlagen. Der Innenmantel 5 weist an seinem oberen Rand, also in dem Bereich des größeren Umfangs, eine nach außen gebördelte Mundrolle 8 auf, die die Füllöffnung umgibt.The in FIG. 1 shown double-walled cup 1 consists essentially of an inner cup 2 with a fillable interior 3 and an outer shell 4. The fillable interior 3 of the inner cup 2 is formed by a conical inner shell 5 and a cup-shaped bottom 6. The open side of the cup-shaped bottom 6 is arranged so that it faces away from the filling opening of the cup 1. The bottom 6 is connected with its wall in the region of the smaller circumference of the inner shell 5 liquid-tight with this by a frame 7. In the region of the frame 7, the material of the inner shell 5 is wrapped around the wall of the bottom 6 and hammered inwards. The inner shell 5 has at its upper edge, ie in the region of the larger circumference, an outwardly beaded mouth roll 8, which surrounds the filling opening.

Die Eigenschaft "konisch" des Innenmantels 5 ist dabei so zu verstehen, dass sich der Innenmantel 5 in dem in Figur 1 dargestellten Längsschnitt von der Mundrolle 8 zu dem Boden 6 verjüngt. Es ist dabei unerheblich, welche Form der Innenmantel 5 im Querschnitt aufweist. Der Innenmantel 5 kann im Querschnitt beispielsweise kreisrund, oval oder auch rechteckig mit abgerundeten Ecken sein. Der lnnenbecher hat im Falle eines runden Querschnitts des konischen Innenmantels 5 eine kegelstumpfähnliche Form, während er im Falle eines rechteckigen Querschnitts eine eher pyramidenstumpfartige Form aufweist.The property "conical" of the inner shell 5 is understood to mean that the inner shell 5 in the in FIG. 1 shown longitudinal section of the mouth roll 8 tapers to the bottom 6. It is irrelevant which shape of the inner shell 5 has in cross section. The inner shell 5 may be circular in cross section, for example, oval or rectangular with rounded corners. In the case of a round cross section of the conical inner shell 5, the inner cup has a truncated cone-like shape, while in the case of a rectangular cross-section it has a more truncated pyramidal shape.

Die Zarge 7 kann bevorzugt wenigstens in einem Bereich entlang ihres Umfangs eine nach außen ragende Aufweitung 9 aufweisen. Die Aufweitung 9 kann sich alternativ auch nur über einen unteren Teilbereich der Zarge 7 erstrecken. Ein unterer Rand der Aufweitung 9 an der Zarge 7 bildet eine Standfläche für den Becher 1. Der Becher steht bei Gebrauch auf seiner Standfläche, die durch die Aufweitung 9 vergrößert ist. Dadurch ist ein Umkippen des Bechers 1 erschwert. Die Aufweitung 9 ist bevorzugt entlang des Umfangs der Zarge 7 umlaufend gestaltet.The frame 7 may preferably have an outwardly projecting widening 9 at least in a region along its circumference. The widening 9 may alternatively extend only over a lower portion of the frame 7. A lower edge of the widening 9 on the frame 7 forms a base for the cup 1. The cup is in use on its footprint, which is increased by the expansion 9. As a result, tilting of the cup 1 is difficult. The expansion 9 is preferably designed circumferentially along the circumference of the frame 7.

Bei Bechern 1 aus Papiermaterial ist die Zarge 7 ein sehr wichtiges Element des Bechers 1. Die Zarge 7 ist notwendig für die Verbindung zwischen dem Innenmantel 5 und dem Boden 6. Das Material des Bodens 6 ist mit dem Material des Innenmantels 5 im Bereich der Zarge 7 verklebt oder versiegelt um wenigstens für einen gewissen Zeitraum flüssigkeitsdicht zu sein. Unter dem Begriff "Papiermaterial" aus dem der Boden 6 und der lnnenmantel 5 besteht, können dabei unterschiedliche Materialien verstanden werden, die wenigstens eine Schicht aus Papier, Pappe oder Karton aufweisen. Zusätzlich kann das Material eine oder mehrere Schichten aus Kunststoff und/oder Aluminium aufweisen. Bevorzugt ist das Papiermaterial auf der den Innenraum 3 begrenzenden Seite mit einer dünnen Kunststoffschicht, vorzugsweise aus Polyethylen, beschichtet. Im Gegensatz zu reinem Kunststoffmaterial ist die Formbarkeit und insbesondere die Dehnbarkeit von derartigen Papiermaterial eingeschränkt. Bei zu starker Verformung kann das Papiermaterial selbst oder auch die vorgesehene Beschichtung reißen, so dass die Dichtigkeit beeinträchtigt ist. Bei Bechern 1 aus Papiermaterial ist deshalb die Zarge 7 ein wesentliches Konstruktionsmerkmal, auf das nicht verzichtet werden kann.For cups 1 made of paper material, the frame 7 is a very important element of the cup 1. The frame 7 is necessary for the connection between the inner shell 5 and the bottom 6. The material of the bottom 6 is with the material of the inner shell 5 in the region of the frame 7 glued or sealed to be liquid-tight at least for a certain period of time. The term "paper material" from which the bottom 6 and the inner shell 5 is made, can be understood to mean different materials which have at least one layer of paper, paperboard or cardboard. In addition, the material may comprise one or more layers of plastic and / or aluminum. Preferably, the paper material is on the side bounding the interior 3 with a thin plastic layer, preferably made of polyethylene, coated. In contrast to pure plastic material, the moldability and in particular the extensibility of such paper material is limited. Too much deformation, the paper material itself or even the intended coating tear, so that the tightness is impaired. For cups 1 made of paper material, therefore, the frame 7 is an essential design feature that can not be waived.

Der Innenmantel 5 kann vorteilhafterweise im Bereich unterhalb der Mundrolle 8 eine sprunghafte Größenveränderung in Form einer Schulter 10 aufweisen, die sich vom Boden 6 zur Mundrolle 8 gesehen als sprunghafte Querschnittserweiterung darstellt. Zwischen der Mundrolle 8 und der Schulter 10 befindet sich auf der Außenfläche des Innenmantels 5 eine Anlagefläche 11 für den Außenmantel 4.The inner shell 5 may advantageously have a sudden change in size in the form of a shoulder 10 in the area below the mouth roll 8, which is seen from the bottom 6 to the mouth roll 8 as a sudden cross-sectional widening. Between the mouth roll 8 and the shoulder 10 is located on the outer surface of the inner shell 5, a contact surface 11 for the outer shell. 4

Damit mehrere doppelwandige Becher 1 gut gestapelt und leicht wieder entstapelt werden können, kann als Mittel zum Stapeln eine Sicke 12 in den Innenmantel 5 eingeformt sein, auf der sich die Aufweitung 9 der Zarge 7 eines in den Innenraum 3 einzusetzenden gleichartigen Bechers 1 abstapelt. Es wird dadurch verhindert, dass sich die gestapelten Becher 1 ineinander verkeilen.So that several double-walled cups 1 can be stacked well and easily unstacked again, a bead 12 can be formed in the inner casing 5 as a means for stacking, on which the widening 9 of the frame 7 of a similar cup 1 to be inserted into the inner space 3 is stacked. It is thereby prevented that the stacked cups 1 wedged into each other.

Der Außenmantel 4 kann unterschiedlich gestaltet sein. Zwei mögliche Gestaltungen des Außenmantels 4 sind in den Figuren 3A und 3B dargestellt. In Figur 3A ist ein glatter Außenmantel 4 zu erkennen, der den Innenmantel 5 in einem gleichmäßigen Abstand umgibt. In Figur 3B ist ein gewellter Außenmantel 4 dargestellt. Der im Wesentlichen ringförmige Luftraum 13 hat dadurch eine wechselnde Breite. Je nach Anforderung kann vorgesehen sein, dass die dem Innenmantel 5 am nächsten liegenden Bereiche des Außenmantels 4 noch einen geringen Abstand zum Innenmantel 5 aufweisen oder alternativ den Innenmantel 5 berühren, so dass sich der Außenmantel 4 am lnnenbecher 2 abstützt und eine verbesserte Stabilität des doppelwandigen Bechers 1 entsteht.The outer jacket 4 can be designed differently. Two possible designs of the outer shell 4 are in the FIGS. 3A and 3B shown. In FIG. 3A is to recognize a smooth outer shell 4, which surrounds the inner shell 5 at a uniform distance. In FIG. 3B a corrugated outer shell 4 is shown. The substantially annular air space 13 thereby has an alternating width. Depending on the requirements, it may be provided that the regions of the outer jacket 4 closest to the inner jacket 5 still have a small distance from the inner jacket 5 or, alternatively, contact the inner jacket 5, so that the outer jacket 4 is supported on the inner cup 2 and improved stability of the double-walled jacket Bechers 1 is created.

Für die Herstellung eines doppelwandigen Bechers 1 wird ein in an sich bekannter Art und Weise vorgefertigter Innenbecher 2 verwendet. Dieser vorgefertigte Innenbecher 2 wird mit einem hülsenförmigen Außenmantel 4 verbunden, so dass zwischen dem Außenmantel 4 und dem Innenmantel 5 des Bechers 1 ein im Wesentlichen ringförmiger Luftraum 13 gebildet wird, entlang dem sich Außenmantel 4 und Innenmantel 5 nicht berühren. Dabei kann die Aufweitung 9 vor oder nach dem Aufschieben des Außenmantels 4 geformt werden. Der Luftraum 13 hat eine gute Isolationswirkung, so dass der doppelwandige Becher 1 auch mit einer in den Innenraum 3 eingefüllten sehr heißen Flüssigkeit problemlos in der Hand gehalten werden kann. Am unteren Ende des Außenmantels 4 ist eine nach innen gerichtete Einrollung 14 vorgesehen, mit der sich der Außenmantel 4 am lnnenbecher 2 abstützt.For the production of a double-walled cup 1 a prefabricated inner cup 2 is used in a manner known per se. This prefabricated inner cup 2 is connected to a sleeve-shaped outer casing 4, so that a substantially annular air space 13 is formed between the outer casing 4 and the inner casing 5 of the cup 1, along which outer casing 4 and inner casing 5 do not touch. In this case, the widening 9 can be formed before or after pushing on the outer jacket 4. The air space 13 has a good insulation effect, so that the double-walled cup 1 can be easily held in the hand even with a filled in the interior 3 very hot liquid. At the bottom End of the outer jacket 4, an inwardly directed curl 14 is provided, with which the outer shell 4 is supported on the inner cup 2.

Zu Herstellung des Außenmantels 4 wird ein in Figur 2 dargestellter flachliegender Zuschnitt 15 verwendet. Der Zuschnitt 15 hat etwa die Form eines Segmentes aus einem Kreisring mit zwei bogenförmigen Kanten 16 und 17 und zwei geraden Enden 17 und 18. Im Gegensatz zu dem Boden 6 und dem Innenmantel 5 besteht der Zuschnitt 15 für den Außenmantel 4 aus einem unbeschichteten Papiermaterial, da der Außenmantel bei der Benutzung des Bechers 1 nicht mit der einzufüllenden Flüssigkeit in Kontakt kommt. Aus Gründen des Umweltschutzes ist es vorteilhaft, die Menge des kunststoffbeschichteten Papiermaterials an dem doppelwandigen Becher 1 zu minimieren. Der doppelwandige Becher 1 wird üblicherweise als Einwegbecher für Heißgetränke verwendet und nach einmaligem Gebrauch entsorgt. Je weniger Kunststoff der Becher 1 enthält, desto besser ist das Papiermaterial wiederverwertbar.To produce the outer jacket 4 is a in FIG. 2 illustrated flat blank 15 used. The blank 15 has approximately the shape of a segment of a circular ring with two arcuate edges 16 and 17 and two straight ends 17 and 18. In contrast to the bottom 6 and the inner shell 5, the blank 15 for the outer shell 4 consists of an uncoated paper material, because the outer shell does not come into contact with the liquid to be filled when using the cup 1. For reasons of environmental protection, it is advantageous to minimize the amount of plastic-coated paper material on the double-walled cup 1. The double-walled cup 1 is commonly used as a disposable cup for hot drinks and disposed of after a single use. The less plastic the cup 1 contains, the better the paper material is recyclable.

Der Zuschnitt 15 wird um einen konischen Dorn gewickelt und das Ende 18 wird mit dem Ende 19 überlappend verbunden. Zur Verbindung der beiden Enden 18 und 19 wird auf das Ende 18 in einem begrenzten Bereich ein thermoplastisches Material als Klebstoff aufgetragen. Der begrenzte Bereich am Ende 18 des Zuschnitts 15, in dem das thermoplastische Material als Klebstoff aufgetragen wird, ist in Figur 2 durch die mit dem Bezugszeichen 20 versehene Schraffur gekennzeichnet.The blank 15 is wound around a conical mandrel and the end 18 is connected in an overlapping manner to the end 19. To connect the two ends 18 and 19, a thermoplastic material is applied to the end 18 in a limited area as an adhesive. The limited area at the end 18 of the blank 15, in which the thermoplastic material is applied as an adhesive, is in FIG. 2 characterized by the hatching provided with the reference numeral 20.

Für das Verbinden der Enden 18 und 19 des Zuschnitts 15 zu dem hülsenförmigen Außenmantel 4 sind zwei unterschiedliche thermoplastische Materialien als Klebstoff besonders geeignet. Zum einen kann als thermoplastisches Material ein Schmelzklebstoff verwendet werden. Der Schmelzklebstoff wird vor dem Verbinden der Enden 18 und 19 auf den begrenzten Bereich 20 des Zuschnitts 15 in flüssiger Form aufgetragen. Hierzu kann eine Dosiervorrichtung vorgesehen sein, die den Schmelzklebstoff mit definierter Temperatur durch eine Düse auf den Zuschnitt 15 aufträgt. Anschließend wird das Ende 19 über den Bereich 20 am Ende 18 gelegt und damit verpresst. Dabei kühlt der Schmelzklebstoff ab und die Enden 18 und 19 sind innerhalb kürzester Zeit sicher miteinander verbunden.For joining the ends 18 and 19 of the blank 15 to the tubular outer shell 4, two different thermoplastic materials are particularly suitable as an adhesive. On the one hand can be used as a thermoplastic material, a hot melt adhesive. The hot melt adhesive is applied in liquid form prior to joining the ends 18 and 19 to the limited area 20 of the blank 15. For this purpose, a metering device can be provided which applies the hotmelt adhesive to the blank 15 through a nozzle at a defined temperature. Subsequently, the end 19 is placed over the area 20 at the end 18 and pressed it. In this case, the hot melt adhesive cools down and the ends 18 and 19 are securely connected to each other within a very short time.

Als besonders vorteilhafte Alternative kann auch ein Siegellack als thermoplastisches Material verwendet werden. Der Siegellack wird mit einer Druckmaschine auf den flachliegenden Zuschnitt 15 im Bereich 20 aufgedruckt und verfestigt sich dort. Vorgefertigte Zuschnitte 15 mit dem aufgebrachten Siegellack im Bereich 20 können dann bei der Herstellung des doppelwandigen Bechers 1 in der Becherherstellmaschine verarbeitet werden, ohne dass in der Becherherstellmaschine ein weiterer Klebstoffauftrag erforderlich ist. Der Zuschnitt 15 mit dem vorher aufgebrachten Siegellack im Bereich 20 wird um einen Dorn gewickelt, wobei das Ende 19 über den Bereich 20 am Ende 18 gelegt wird. Unter kurzzeitiger Wärmeeinwirkung werden die Enden 18 und 19 aneinander gepresst, so dass der Siegellack wieder erwärmt wird, und dadurch das Ende 19 mit dem Ende 18 verklebt.As a particularly advantageous alternative, a sealing wax can be used as a thermoplastic material. The sealing wax is printed with a printing press on the flat blank 15 in area 20 and solidifies there. Prefabricated blanks 15 with the applied sealing wax in the area 20 can then in the production of the double-walled Bechers 1 are processed in the Becherherstellmaschine without in the Becherherstellmaschine another adhesive application is required. The blank 15 with the previously applied sealing wax in the region 20 is wound around a mandrel, wherein the end 19 is placed over the region 20 at the end 18. Under brief heat, the ends 18 and 19 pressed against each other, so that the sealing wax is reheated, and thereby the end 19 bonded to the end 18.

Nach dem Verbinden der Enden 18 und 19 des Zuschnitts 15 zu einem hülsenförmigen Außenmantel 4 mit dem thermoplastischen Material als Klebstoff, wird an der bogenförmigen Kante 17 die nach innen gerichtete Einrollung 14 geformt, und der hülsenförmige Außenmantel 4 wird von dem Dorn abgenommen. Anschließend wird der hülsenförmige Außenmantel 4 in axialer Richtung auf den vorgefertigten lnnenbecher 2 von unten her aufgeschoben und am Innenbecher 2 befestigt. Die Befestigung des Außenmantels 4 am lnnenbecher 2 erfolgt dadurch, dass ein Bereich an der oberen Kante 16 des Außenmantels 4 sich an die Anlagefläche 11 des Innenmantels 5 anlegt. Je nach Art des verwendeten thermoplastischen Materials als Klebstoff kann die Befestigung des hülsenförmigen Außenmantels 4 am Innenbecher 2 ebenfalls unterschiedlich durchgeführt werden. Bei der Verwendung eines Schmelzklebstoffs wird der Schmelzklebstoff in flüssiger Form entweder auf den Außenmantel 4 im Bereich der oberen Kante 16 aufgetragen oder auf die Anlagefläche 11 des lnnenbechers auftragen, bevor der Außenmantel 4 von unten auf den lnnenbecher 2 geschoben wird. Nach Aufschieben des Außenmantels 4 auf den Innenbecher 2 kann der Außenmantel 4 noch mit dem Innenmantel 5 im Bereich zwischen der Schulter 10 und der Mundrolle 8 verpresst werden.After connecting the ends 18 and 19 of the blank 15 to a sleeve-shaped outer shell 4 with the thermoplastic material as adhesive, the inwardly directed curl 14 is formed at the arcuate edge 17, and the sleeve-shaped outer shell 4 is removed from the mandrel. Subsequently, the sleeve-shaped outer jacket 4 is pushed in the axial direction onto the prefabricated inner cup 2 from below and fastened to the inner cup 2. The attachment of the outer shell 4 on the inner cup 2 is effected in that a region at the upper edge 16 of the outer shell 4 rests against the contact surface 11 of the inner shell 5. Depending on the type of thermoplastic material used as an adhesive, the attachment of the sleeve-shaped outer sheath 4 on the inner cup 2 can also be carried out differently. When using a hotmelt adhesive, the hotmelt adhesive is either applied in liquid form to the outer shell 4 in the region of the upper edge 16 or applied to the contact surface 11 of the inner cup before the outer shell 4 is pushed onto the inner cup 2 from below. After pushing the outer shell 4 on the inner cup 2, the outer shell 4 can be pressed with the inner shell 5 in the area between the shoulder 10 and the mouth roll 8.

Bei der Verwendung eines Siegellackes als thermoplastisches Material ist auf dem Zuschnitt 15 entlang der bogenförmigen Kante 16 analog zu dem Bereich 20 am Ende 18 ein begrenzter Bereich 21 vorgesehen, in dem Siegellack aufgetragen ist. Der Bereich 21 befindet sich nach Verbinden der Enden 18 und 19 des Zuschnitts auf der Innenseite des hülsenförmigen Außenmantels 4 und kommt nach dem Aufschieben des Außenmantels 4 in Kontakt mit der Anlagefläche 11 des lnnenbechers 2. Zum Verbinden des Außenmantels 4 mit dem Innenbecher 2 wird nun der Außenmantel 4 und der Innenmantel 5 im Bereich 11 mit dem dazwischenliegenden Siegellack unter Wärmeeinwirkung verpresst und versiegelt.When using a sealing wax as a thermoplastic material, a limited area 21 is provided on the blank 15 along the arcuate edge 16 analogous to the area 20 at the end 18, is applied in the sealing wax. The area 21 is located after connecting the ends 18 and 19 of the blank on the inside of the sleeve-shaped outer shell 4 and comes after pushing the outer shell 4 in contact with the contact surface 11 of the inner cup 2. For connecting the outer shell 4 with the inner cup 2 is now the outer jacket 4 and the inner jacket 5 are pressed and sealed in the region 11 with the sealing wax in between under the action of heat.

Ein Verpressen des Außenmantels 4 und des Innenmantels 5 im Bereich 11 mit dem dazwischen liegenden thermoplastischen Material als Klebstoff kann je nach Anforderung unterschiedlich durchgeführt werden. Vorteilhaft kann ein über den gesamten Umfang des Bechers 1 durchgehendes Verpressen sein, so dass eine stabile Verbindung zwischen Außenmantel 4 und lnnenbecher 2 entsteht. Es kann jedoch auch ausreichend sein, den Außenmantel und den Innenmantel 5 nur in lokal begrenzten Bereichen innerhalb des Bereiches 11 zu verpressen, so dass der Außenmantel 4 nicht entlang des gesamten Umfangs des Bechers 1 mit dem lnnenbecher 2 verbunden ist. Für eine solche Variante kann es vorteilhaft sein, auch das thermoplastische Material nur in denjenigen Bereichen aufzutragen, die später auch verpresst werden. Im Falle eines Schmelzklebstoffs kann es beispielsweise ausreichend sein, diesen lediglich punktförmig aufzutragen, bevor der Außenmantel 4 von unten auf den Innenbecher 2 geschoben wird. Bei der Verwendung von Siegellack kann vorgesehen sein, dass nur in Teilbereichen des Bereiches 21 entlang der bogenförmigen Kante 16 des Zuschnitts 15 ein Siegellack aufgetragen ist. Die für die Herstellung des doppelwandigen Bechers 1 benötigte Menge an thermoplastischen Material kann dadurch minimiert werden.A pressing of the outer shell 4 and the inner shell 5 in the region 11 with the intervening thermoplastic material as an adhesive can be performed differently depending on the requirements. Advantageously, a over the entire circumference of the cup. 1 be continuous pressing, so that a stable connection between outer shell 4 and inner cup 2 is formed. However, it may also be sufficient to press the outer jacket and the inner jacket 5 only in localized areas within the region 11, so that the outer jacket 4 is not connected to the inner cup 2 along the entire circumference of the cup 1. For such a variant, it may be advantageous to apply the thermoplastic material only in those areas that will later be pressed. In the case of a hotmelt adhesive, for example, it may be sufficient to apply it only in a punctiform manner before the outer shell 4 is pushed onto the inner cup 2 from below. When sealing wax is used, provision may be made for a sealing lacquer to be applied only in partial regions of the region 21 along the arcuate edge 16 of the blank 15. The amount of thermoplastic material required for the production of the double-walled cup 1 can thereby be minimized.

Zur Verdeutlichung der vorliegenden Erfindung sind in den Figuren 4 bis 7 unterschiedliche Ausgestaltungen von doppelwandigen Bechern 1 dargestellt. Gleiche Bezugszeichen kennzeichnen gleiche Teile wie in den Figuren 1 und 2. Die in Bezug auf die Figuren 1 und 2 gemachten Erläuterungen gelten analog, so dass auf eine wiederholte Beschreibung verzichtet werden kann. Insbesondere kann der Außenmantel 4 die in den Figuren 3A und 3B dargestellten Varianten einer glatten oder einer gewellten Form annehmen.To illustrate the present invention are in the FIGS. 4 to 7 different embodiments of double-walled cups 1 shown. Like reference numerals denote like parts as in FIGS Figures 1 and 2 , The in terms of the Figures 1 and 2 The explanations given apply analogously so that a repeated description can be dispensed with. In particular, the outer sheath 4 in the FIGS. 3A and 3B assume variants of a smooth or a wavy shape.

In Figur 4 ist ein doppelwandiger Becher 1 dargestellt, der sich von dem Becher der Figur 1 darin unterscheidet, dass die Zarge 7 den konischen Innenmantel 5 ohne Aufweitung fortsetzt. Die Einrollung 14 des Außenmantels 4 ist nicht platt gedrückt und stützt sich ebenfalls am Außenumfang des Innenmantels 5 ab.In FIG. 4 a double-walled cup 1 is shown extending from the cup of FIG. 1 differs in that the frame 7 continues the conical inner shell 5 without widening. The curl 14 of the outer shell 4 is not pressed flat and also supported on the outer circumference of the inner shell 5 from.

Bei dem doppelwandigen Becher 1 der Figur 5 wurde im Vergleich zu dem Becher der Figur 4 auf die Schulter 10 unterhalb der Mundrolle 8 verzichtet. Der Innenmantel 5 des lnnenbechers 2 verläuft mit durchgehend gleichbleibendem Neigungswinkel vom Boden 6 bis zur Mundrolle 8. Da sich die Anlagefläche 11 des hülsenförmigen Außenmantels 4 bei dem Becher der Figur 5 oberhalb des Flüssigkeitsspiegels in den Innenraum 3 einzufüllenden heißen Flüssigkeit befindet, besteht keine Gefahr, dass der thermoplastische Klebstoff am Außenmantel 4 durch die Wärmeinwirkung wieder weich wird.In the double-walled cup 1 of FIG. 5 was compared to the cup of FIG. 4 waived the shoulder 10 below the mouth roll 8. The inner shell 5 of the inner cup 2 extends with a constant constant angle of inclination from the bottom 6 to the mouth roll 8. Since the contact surface 11 of the sleeve-shaped outer shell 4 in the cup of the FIG. 5 There is no risk that the thermoplastic adhesive on the outer shell 4 is softened again by the action of heat above the liquid level in the interior 3 to be filled.

In Figur 6 ist ein doppelwandiger Becher 1 dargestellt, der einen lnnenbecher 2 aus einem Kunststoffmaterial aufweist. Bei dem lnnenbecher 2 aus Kunststoffmaterial ist der Innenmantel 5 und der Boden 6 einteilig geformt. Es ist keine Zarge 7 wie bei den lnnenbechern 2 aus Papiermaterial notwendig. Anstatt einer Mundrolle 8 weist der lnnenbecher 2 der Figur 6 einen Flansch 22 auf, der an den Innenmantel 5 am oberen Rand angeformt ist. Unterhalb des Flansches 22 ist eine Schulter 10 angeordnet. Zwischen dem Flansch 22 und der Schulter 10 befindet sich die Anlagefläche 11 für den Außenmantel 4.In FIG. 6 a double-walled cup 1 is shown, which has an inner cup 2 made of a plastic material. In the inner cup 2 made of plastic material, the inner shell 5 and the bottom 6 is integrally molded. There is no frame 7 as in the inner cups 2 made of paper material necessary. Instead of a mouth roll 8, the inner cup 2 has the FIG. 6 a flange 22 which is integrally formed on the inner shell 5 at the upper edge. Below the flange 22, a shoulder 10 is arranged. Between the flange 22 and the shoulder 10 is the contact surface 11 for the outer shell. 4

In Figur 7 ist eine Variante eines doppelwandigen Bechers 1 dargestellt, bei der der Innenbecher 2 wie der lnnenbecher 2 der Figur 6 aus Kunststoff besteht. Der Innenmantel 5 gemäß Figur 7 weist zwischen Boden 6 und Flansch 22 einen konstanten Neigungswinkel auf, der nicht durch Schultern oder Sicken unterbrochen ist. Der Außenmantel 4 liegt unterhalb des Flansches 22 im Bereich einer Anlagefläche 11 und mit einer Einrollung 14 am unteren Ende des Außenmantels 4 an dem Innenmantel 5 des lnnenbechers 2 an.In FIG. 7 a variant of a double-walled cup 1 is shown, in which the inner cup 2 as the inner cup 2 of the FIG. 6 made of plastic. The inner jacket 5 according to FIG. 7 has between bottom 6 and flange 22 at a constant angle of inclination, which is not interrupted by shoulders or beads. The outer jacket 4 rests against the inner jacket 5 of the inner cup 2 below the flange 22 in the region of a contact surface 11 and with a curl 14 at the lower end of the outer jacket 4.

Claims (8)

Verfahren zum Herstellen eines doppelwandigen Bechers bei dem ein hülsenförmiger Außenmantel aus einem Papiermaterial auf einen vorgefertigten lnnenbecher axial aufgeschoben und befestigt wird, wobei der hülsenförmige Außenmantel vor dem Aufschieben aus einem flachliegenden Zuschnitt durch Verbinden der Enden des Zuschnitts geformt wird, und wobei die Enden des Zuschnitts durch einen in einem begrenzten Bereich des Außenmantels aufgetragenen Klebstoff verbunden werden, dadurch gekennzeichnet, dass beim Verbinden der Ende des Zuschnitts zu einem hülsenförmigen Außenmantel ein thermoplastisches Material als Klebstoff verwendet wird.A method for producing a double-walled cup in which a sleeve-shaped outer shell made of a paper material is axially slid and fastened onto a prefabricated inner cup, wherein the sleeve-shaped outer shell is formed from a flat blank by joining the ends of the blank prior to being pushed on, and wherein the ends of the blank be joined by an adhesive applied in a limited area of the outer shell, characterized in that when connecting the end of the blank to a sleeve-shaped outer shell, a thermoplastic material is used as an adhesive. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass als thermoplastisches Material ein Schmelzklebstoff verwendet wird, der vor dem Verbinden der Enden des Zuschnitts zu einem hülsenförmigen Außenmantel auf einem begrenzten Bereich des Zuschnitts aufgetragen wird.A method according to claim 1, characterized in that as the thermoplastic material, a hot melt adhesive is used, which is applied to a sleeve-shaped outer shell on a limited area of the blank prior to joining the ends of the blank. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass als thermoplastisches Material ein Siegellack verwendet wird, der in einem dem Formen des Außenmantels vorgelagerten Schritt auf den flachliegenden Zuschnitt aufgetragen wird, der sich auf dem flachliegenden Zuschnitt verfestigt und der beim Verbinden der Enden des Zuschnitts zu einem hülsenförmigen Außenmantel wieder erwärmt wird und dadurch die Enden miteinander verklebt.A method according to claim 1, characterized in that as a thermoplastic material, a sealing wax is used, which is applied in an outer layer of the molding of the outer shell on the flat blank, which solidifies on the flat blank and the connecting the ends of the blank to a sleeve-shaped outer jacket is reheated and thereby glued the ends together. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass bei der Befestigung des hülsenförmigen Außenmantels am Innenbecher ebenfalls ein in einem begrenzten Bereich des Außenmantels aufgetragenes thermoplastisches Material als Klebstoff verwendet wird.Method according to one of claims 1 to 3, characterized in that during the attachment of the sleeve-shaped outer sheath on the inner cup also used in a limited area of the outer sheath thermoplastic material is used as an adhesive. Doppelwandiger Becher (1) bestehend aus einem lnnenbecher (2) und einem hülsenförmigen Außenmantel (4) aus einem Papiermaterial, der aus einem an seinen Enden (18, 19) verbundenen Zuschnitt (15) gebildet ist, und bei dem die Enden (18, 19) des Zuschnitts (15) durch ein in einem begrenzten Bereich des Außenmantels aufgetragenen Klebstoff verbunden sind, dadurch gekennzeichnet, dass die Enden (18, 19) des Zuschnitts (15) des hülsenförmigen Außenmantels (4) mit einem thermoplastischen Material als Klebstoff verbunden sind.Double-walled cup (1) consisting of an inner cup (2) and a sleeve-shaped outer shell (4) made of a paper material which is formed from a blank (15) connected at its ends (18, 19) and in which the ends (18, 19) of the blank (15) are connected by an adhesive applied in a limited area of the outer jacket, characterized in that the ends (18, 19) of the blank (15) of the sleeve-shaped outer jacket (4) are provided with a thermoplastic material are connected as an adhesive. Becher nach Anspruch 5, dadurch gekennzeichnet, dass die Enden (18, 19) des Zuschnitts (15) des hülsenförmigen Außenmantels (4) mit einem Schmelzklebstoff verbunden sind.Cup according to claim 5, characterized in that the ends (18, 19) of the blank (15) of the sleeve-shaped outer sheath (4) are connected to a hotmelt adhesive. Becher nach Anspruch 5, dadurch gekennzeichnet, dass die Enden (18, 19) des Zuschnitts (15) des hülsenförmigen Außenmantels (4) mit einem Siegellack verbunden sind.Cup according to claim 5, characterized in that the ends (18, 19) of the blank (15) of the tubular outer jacket (4) are connected to a sealing lacquer. Becher nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, dass der hülsenförmige Außenmantel (4) mit dem Innenbecher (2) ebenfalls durch ein in einem begrenzten Bereich (21) des Außenmantels (4) aufgetragenes thermoplastisches Material als Klebstoff verbunden ist.Cup according to one of claims 5 to 7, characterized in that the sleeve-shaped outer jacket (4) with the inner cup (2) is also connected by a in a limited region (21) of the outer shell (4) applied thermoplastic material as an adhesive.
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US8146796B2 (en) 2001-01-30 2012-04-03 Seda S.P.A. Cardboard container for drinks and process therefor
US8360263B2 (en) 2005-04-15 2013-01-29 Seda S.P.A. Insulated container, method of fabricating same and apparatus for fabricating
US8794294B2 (en) 2005-04-15 2014-08-05 Seda S.P.A. Insulated container, method of fabricating same and apparatus for fabricating
US9783359B2 (en) 2005-09-08 2017-10-10 Seda S.P.A. Double-walled cup
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US8393886B2 (en) 2005-11-14 2013-03-12 Seda S.P.A. Device for producing a stacking projection and container with same
US8191708B2 (en) 2006-12-05 2012-06-05 Seda S.P.A. Package
US8240476B2 (en) 2006-12-05 2012-08-14 Seda S.P.A. Package
US8267250B2 (en) 2006-12-05 2012-09-18 Seda S.P.A. Package
US8490792B2 (en) 2006-12-05 2013-07-23 Seda S.P.A. Package

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DE102008014878A1 (en) 2009-09-17
US20090230178A1 (en) 2009-09-17
EP2108506B1 (en) 2020-09-09
AU2009200641A1 (en) 2009-10-01
EP2108506A3 (en) 2011-08-31
BRPI0900719A2 (en) 2009-11-03
BRPI0900719B1 (en) 2019-06-25
AU2009200641B2 (en) 2013-08-01
CN101531070A (en) 2009-09-16
US11745933B2 (en) 2023-09-05
US20170253417A1 (en) 2017-09-07
US9718601B2 (en) 2017-08-01

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