EP0790193B1 - Opening device for a flanged foil-sealed container - Google Patents

Opening device for a flanged foil-sealed container Download PDF

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Publication number
EP0790193B1
EP0790193B1 EP97400302A EP97400302A EP0790193B1 EP 0790193 B1 EP0790193 B1 EP 0790193B1 EP 97400302 A EP97400302 A EP 97400302A EP 97400302 A EP97400302 A EP 97400302A EP 0790193 B1 EP0790193 B1 EP 0790193B1
Authority
EP
European Patent Office
Prior art keywords
layer
tongue
varnish
metal
capsule
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97400302A
Other languages
German (de)
French (fr)
Other versions
EP0790193A1 (en
Inventor
Laurent F. Kretz
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
Publication of EP0790193A1 publication Critical patent/EP0790193A1/en
Application granted granted Critical
Publication of EP0790193B1 publication Critical patent/EP0790193B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the present invention relates to a container having a peripheral rim on which a cover is fixed by heat sealing, said cover having a heat sealable bottom layer sealed against the peripheral rim and a layer metallic upper adhering to the layer heat sealable, the latter being separable by peeling of the peripheral rim by exerting a traction manual on a tab fitted to said cover.
  • the top layer should be rigid enough to allow removal of the seal by peeling and without tearing and perfectly raincoat. It is generally metallic.
  • the tongue is part of the cover and it is arranged outside the cord of sealing. It must have sufficient surface to allow the user to initiate the peeling without too much difficulty.
  • the lids and containers are separated together by cutting using cutting tools installed on the same chain.
  • the outline of the lid and the outline of the container return are superimposed.
  • the tongue is in this case arranged above a rim portion which can be separated from the rim properly so-called by a pre-cut line of weakness. This rim portion should separate from the container when pulling on the tongue. In the absence of a line of weakness, the user must move the tab away from this front edge portion to peel.
  • the tongue has a relatively small area compared to the area total cover, and peeling may be difficult even impossible, especially if the seal adheres strongly at the edge by heat sealing.
  • the purpose of the present invention is to overcome these disadvantages, by proposing a large tongue dimension.
  • the tongue consists of a metallic foil likely to completely cover the layer metallic of the cover, said metallic sheet being linked to the metallic layer of the cover, to the level of a lateral segment, by a layer of a material adhering to the metal layer and to the metallic foil, and the adhering material covers the entire underside of the sheet metallic, a varnish not adhering to the layer metallic and not hot-reactivable being applied against the underside of the material layer adhering in the outer zone to the lateral segment.
  • This varnish is for example a cellulose varnish.
  • the adherent material is chosen from materials with strong adhesion. It can be in particular an Ethylene Acryclic Acid copolymer.
  • the container 1 shown in the drawings is presented in the form of a frustoconical cup containing a liquid 4.
  • This cup can be made by thermoforming of a polypropylene strip, of cardboard coated or PVC.
  • the cover 3 essentially comprises two layers: an upper layer 5 of aluminum and a bottom layer 6 heat sealable adhering to the aluminum layer 5 and bonded to the edge material device 2 along a weld bead 7.
  • a tongue 10 is arranged above the cover 3, this tongue consists of a sheet of aluminum 11 which completely covers the layer aluminum 5 and whose outline corresponds rigorously around the lid 2.
  • the aluminum sheet 11 has on its face lower layer 12 of an adherent material strongly aluminum, an Ethylene Acid copolymer Acrylic for example. Under the underside of the layer 12, apply a layer of varnish 13 no adhering to aluminum and not hot-reactivable. The varnish is applied to most of the surface of layer 13 with the exception of a segment 14 delimited by a cord 15 and a portion 16 of the contour layer 12 device, the cord 15 connecting the ends of this portion 16.
  • the tongue 10 is raised at the vertical in the direction indicated by arrow 20, then is exerted on the tongue 10, using a hand, a force 21 directed upwards while holding container 1 on the other hand.
  • the cover 3 and the tab 10 described above can advantageously be drawn from the same strip of composite material, comprising the five layers superimposed 6, 5, 13, 12, 11 constituting the cover 3 and the tongue 10, during the cutting phase of 1 filled and closed containers on the manufacturing and packaging line containers.
  • the aluminum layers 5 and 11 can obviously be replaced by other materials, including polyester or paper depending on the use.
  • the aluminum layers 5 and 11 are preferably a thickness between 12 and 60 micrometers.
  • the density of layer 12 of Ethylene Acid copolymer Acrylic is twenty grams per square meter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Laminated Bodies (AREA)
  • Closing Of Containers (AREA)
  • Package Closures (AREA)
  • Closures For Containers (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Abstract

The container made, e.g. from moulded polypropylene, coated card or PVC, has a lid (3) made from an upper metal layer (5) stuck to a thermo-seal layer (6) which is detachable from the rim (2) of the container by pulling on a tongue (10) fixed to the lid. The tongue (10) is made from a layer of metal foil which covers the whole of the metal surface of the lid and is attached to it across one lateral segment (14) by a layer of a material (12) which adheres to both metal layers. The adhesive material (12) covers the whole of the under surface of the tongue, and is partially coated with a non-adhesive varnish (13). The adhesive material is an ethylene acid acrylic copolymer, and the varnish is a nitrocellulose varnish.

Description

La présente invention concerne un récipient comportant un rebord périphérique sur lequel un opercule est fixé par thermoscellage, ledit opercule comportant une couche inférieure thermoscellable scellée contre le rebord périphérique et une couche supérieure métallique adhérant à la couche thermoscellable, cette dernière étant séparable par pelage du rebord périphérique en exerçant une traction manuelle sur une languette équipant ledit opercule.The present invention relates to a container having a peripheral rim on which a cover is fixed by heat sealing, said cover having a heat sealable bottom layer sealed against the peripheral rim and a layer metallic upper adhering to the layer heat sealable, the latter being separable by peeling of the peripheral rim by exerting a traction manual on a tab fitted to said cover.

Ce type de récipient est notamment utilisé pour contenir des boissons ou d'autres produits alimentaires ou médicaux. La couche supérieure doit être suffisamment rigide pour permettre l'enlèvement de l'opercule par pelage et sans déchirure et parfaitement imperméable. Elle est généralement métallique.This type of container is used in particular for contain drinks or other food items or medical. The top layer should be rigid enough to allow removal of the seal by peeling and without tearing and perfectly raincoat. It is generally metallic.

En général la languette fait partie de l'opercule et elle est disposée à l'extérieur du cordon de scellement. Elle doit avoir une surface suffisante pour permettre à l'utilisateur de réaliser l'amorce du pelage sans trop de difficultés.In general the tongue is part of the cover and it is arranged outside the cord of sealing. It must have sufficient surface to allow the user to initiate the peeling without too much difficulty.

Lorsque les récipients sont réalisés par thermoformage d'une feuille plastique, remplis et scellés sur une même chaíne de conditionnements, les opercules et les récipients sont séparés ensemble par découpe au moyens d'outils de découpe installés sur la même chaíne. Dans ce cas, le contour de l'opercule et le contour du retour du récipient sont superposés. La languette est dans ce cas disposée au-dessus d'une portion de rebord qui peut-être séparée du rebord proprement dit par une ligne de faiblesse prédécoupée. Cette portion de rebord doit se séparer du récipient lorsqu'on exerce une traction sur la languette. En l'absence de ligne de faiblesse, l'utilisateur doit écarter la languette de cette portion de rebord avant de procéder au pelage.When the containers are made by thermoforming of a plastic sheet, filled and sealed on the same packaging chain, the lids and containers are separated together by cutting using cutting tools installed on the same chain. In this case, the outline of the lid and the outline of the container return are superimposed. The tongue is in this case arranged above a rim portion which can be separated from the rim properly so-called by a pre-cut line of weakness. This rim portion should separate from the container when pulling on the tongue. In the absence of a line of weakness, the user must move the tab away from this front edge portion to peel.

Toutefois, dans ces deux cas, la languette a une surface relativement faible par rapport à la surface totale de l'opercule, et le pelage peut être difficile voire impossible, notamment si l'opercule adhère fortement au rebord par thermoscellage.However, in these two cases, the tongue has a relatively small area compared to the area total cover, and peeling may be difficult even impossible, especially if the seal adheres strongly at the edge by heat sealing.

Le but de la présente invention est de pallier ces inconvénients, en proposant une languette de grande dimension.The purpose of the present invention is to overcome these disadvantages, by proposing a large tongue dimension.

L'invention atteint son but par le fait que la languette est constituée d'une feuille métallique susceptible de recouvrir totalement la couche métallique de l'opercule, ladite feuille métallique étant liée à la couche métallique de l'opercule, au niveau d'un segment latéral, par une couche d'un matériau adhérant à la couche métallique et à la feuille métallique, et le matériau adhérant recouvre la totalité de la face inférieure de la feuille métallique, un vernis non adhérant à la couche métallique et non réactivable à chaud étant appliqué contre la face inférieure de la couche de matériau adhérant dans la zone extérieure au segment latéral. Ce vernis est par exemple un vernis cellulosique.The invention achieves its object by the fact that the tongue consists of a metallic foil likely to completely cover the layer metallic of the cover, said metallic sheet being linked to the metallic layer of the cover, to the level of a lateral segment, by a layer of a material adhering to the metal layer and to the metallic foil, and the adhering material covers the entire underside of the sheet metallic, a varnish not adhering to the layer metallic and not hot-reactivable being applied against the underside of the material layer adhering in the outer zone to the lateral segment. This varnish is for example a cellulose varnish.

Le matériau adhérant est choisi parmi les matériaux ayant une forte adhérence. Ce peut être notamment un copolymère Ethylène Acide Acryclique.The adherent material is chosen from materials with strong adhesion. It can be in particular an Ethylene Acryclic Acid copolymer.

D'autres avantages et caractéristiques de l'invention ressortiront à la lecture de la description suivante faite à titre d'exemple non limitatif et en référence aux dessins annexés dans lesquels:

  • la figure 1 montre en coupe un récipient à rebord scellé par un opercule muni d'une languette selon l'invention,
  • la figure 2 montre à grande échelle les diverses couches de l'opercule et de la languette, cette dernière étant écartée de l'opercule par souci de clarté,
  • les figures 3 et 4 montrent les différentes étapes à réaliser pour ouvrir le récipient.
    • Other advantages and characteristics of the invention will emerge on reading the following description given by way of nonlimiting example and with reference to the appended drawings in which:
  • FIG. 1 shows in section a container with a rim sealed with a cover provided with a tab according to the invention,
  • FIG. 2 shows on a large scale the various layers of the cover and of the tongue, the latter being separated from the cover for the sake of clarity,
  • Figures 3 and 4 show the different steps to perform to open the container.

    • Sur les dessins on a représenté par la référence 1 un récipient 1 comportant un rebord périphérique 2 sur lequel est scellé par thermoscellage un opercule 3.In the drawings there is shown by reference 1 a container 1 having a peripheral rim 2 on which is sealed by a seal 3.

    Le récipient 1 montré sur les dessins se présente sous la forme d'un gobelet tronconique contenant un liquide 4. Ce gobelet peut être réalisé par thermoformage d'une bande de polypropylène, de carton enduit ou de PVC.The container 1 shown in the drawings is presented in the form of a frustoconical cup containing a liquid 4. This cup can be made by thermoforming of a polypropylene strip, of cardboard coated or PVC.

    L'opercule 3 comporte essentiellement deux couches: une couche supérieure 5 en aluminium et une couche inférieure 6 thermoscellable adhérant à la couche en aluminium 5 et liée au matériau du rebord périphérique 2 selon un cordon de soudure 7.The cover 3 essentially comprises two layers: an upper layer 5 of aluminum and a bottom layer 6 heat sealable adhering to the aluminum layer 5 and bonded to the edge material device 2 along a weld bead 7.

    Pour permettre l'ouverture du récipient 1, une languette 10 est disposée au-dessus de l'opercule 3, cette languette est constituée par une feuille d'aluminium 11 qui recouvre totalement la couche d'aluminium 5 et dont le contour correspond rigoureusement au contour de l'opercule 2.To allow the opening of container 1, a tongue 10 is arranged above the cover 3, this tongue consists of a sheet of aluminum 11 which completely covers the layer aluminum 5 and whose outline corresponds rigorously around the lid 2.

    La feuille d'aluminium 11 comporte sur sa face inférieure une couche 12 d'un matériau adhérant fortement à l'aluminium, un copolymère Ethylène Acide Acrylique par exemple. Sous la face inférieure de la couche 12, on applique une couche de vernis 13 non adhérant à l'aluminium et non réactivable à chaud. Le vernis est appliqué sur la plus grande partie de la surface de la couche 13 à l'exception d'un segment 14 délimité par une corde 15 et une portion 16 du contour périphérique de la couche 12, la corde 15 reliant les extrémités de cette portion 16.The aluminum sheet 11 has on its face lower layer 12 of an adherent material strongly aluminum, an Ethylene Acid copolymer Acrylic for example. Under the underside of the layer 12, apply a layer of varnish 13 no adhering to aluminum and not hot-reactivable. The varnish is applied to most of the surface of layer 13 with the exception of a segment 14 delimited by a cord 15 and a portion 16 of the contour layer 12 device, the cord 15 connecting the ends of this portion 16.

    Au niveau du segment 14, la couche 12 de matériau adhérant adhère à la couche en aluminium 5. En dehors du segment 14, l'opercule 2 et la languette 10 sont jointifs mais ne sont pas liés entre eux du fait de la couche de vernis 13.At segment 14, layer 12 of material adhering adheres to the aluminum layer 5. Outside of segment 14, the seal 2 and the tongue 10 are joined but are not linked to each other due to the varnish layer 13.

    Pour ouvrir le récipient 1 on procède de la manière suivante: on relève la languette 10 à la verticale dans le sens indiqué par la flèche 20, puis on exerce sur la languette 10, à l'aide d'une main, une force 21 dirigée vers le haut en tenant le récipient 1 de l'autre main.To open the container 1, proceed from the as follows: the tongue 10 is raised at the vertical in the direction indicated by arrow 20, then is exerted on the tongue 10, using a hand, a force 21 directed upwards while holding container 1 on the other hand.

    La surface du segment 14 et le choix du matériau adhérant de la couche 12 sont calculés de telle manière que la force 21 provoque l'ouverture du récipient 1 par pelage de l'opercule 3 et ne provoque pas l'arrachage de la languette 10 de l'opercule 3.The surface of segment 14 and the choice of material adhering from layer 12 are calculated in such a way force 21 causes the container 1 to open by peel of cover 3 and does not cause tearing of the tab 10 of the cover 3.

    La disposition de la languette 10 décrite ci-dessus permet une préhension aisée de cette dernière et une facilité d'ouverture du récipient 1.The arrangement of the tab 10 described above allows easy gripping of the latter and ease of opening the container 1.

    L'opercule 3 et la languette 10 décrits ci-dessus peuvent être avantageusement tirés d'une même bande de matériau composite, comportant les cinq couches superposées 6, 5, 13, 12, 11 constitutives de l'opercule 3 et de la languette 10, au cours de la phase de découpe des récipients 1 remplis et obturés sur la chaíne de fabrication et de conditionnement des récipients.The cover 3 and the tab 10 described above can advantageously be drawn from the same strip of composite material, comprising the five layers superimposed 6, 5, 13, 12, 11 constituting the cover 3 and the tongue 10, during the cutting phase of 1 filled and closed containers on the manufacturing and packaging line containers.

    Les couches d'aluminium 5 et 11 peuvent évidemment être remplacés par d'autres matériaux, notamment du polyester ou du papier en fonction de l'usage.The aluminum layers 5 and 11 can obviously be replaced by other materials, including polyester or paper depending on the use.

    Les couches d'aluminium 5 et 11 ont de préférence une épaisseur comprise entre 12 et 60 micromètres. La densité de la couche 12 de copolymère Ethylène Acide Acrylique est de vingt grammes par mètre carré.The aluminum layers 5 and 11 are preferably a thickness between 12 and 60 micrometers. The density of layer 12 of Ethylene Acid copolymer Acrylic is twenty grams per square meter.

    Claims (3)

    1. A receptacle including a peripheral rim (2) on which a capsule (3) is fixed by thermosealing, said capsule (3) including a heat-sealable bottom layer (6) sealed against the peripheral rim (2) and a metal top layer (5) adhering to the heat-sealable layer (6), the capsule being peelable off the peripheral rim (2) by exerting manual traction on a tongue (10) of said capsule (3),
         characterised by the fact that the tongue (10) is constituted by a metal sheet (11) suitable for covering fully the metal layer (5) of the capsule (3), said metal sheet (11) being connected to the metal layer (5) of the capsule (2) in a lateral segment (14) by means of a layer (12) of adhesive material that adheres to the metal layer (5) and to the metal sheet (11), and by the fact that the adhesive material covers the entire bottom face of the metal sheet (11), with a varnish (13) that does not adhere to the metal layer (5) and that is not reactivatable on heating being applied to the bottom face of the layer (12) of adhesive material in the zone not including the lateral segment (14).
    2. A receptacle according to claim 1,
         characterised by the fact that the adhesive material is a copolymer of ethylene and acrylic acid.
    3. A receptacle according to claim 1,
         characterised by the fact that the varnish is a nitrocellulose varnish.
    EP97400302A 1996-02-19 1997-02-11 Opening device for a flanged foil-sealed container Expired - Lifetime EP0790193B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9602011A FR2744986B1 (en) 1996-02-19 1996-02-19 DEVICE FOR OPENING A CONTAINER WITH A LID
    FR9602011 1996-02-19

    Publications (2)

    Publication Number Publication Date
    EP0790193A1 EP0790193A1 (en) 1997-08-20
    EP0790193B1 true EP0790193B1 (en) 2002-07-31

    Family

    ID=9489338

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP97400302A Expired - Lifetime EP0790193B1 (en) 1996-02-19 1997-02-11 Opening device for a flanged foil-sealed container

    Country Status (6)

    Country Link
    US (1) US5709310A (en)
    EP (1) EP0790193B1 (en)
    JP (1) JPH09323759A (en)
    AT (1) ATE221497T1 (en)
    DE (1) DE69714313D1 (en)
    FR (1) FR2744986B1 (en)

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    Also Published As

    Publication number Publication date
    ATE221497T1 (en) 2002-08-15
    US5709310A (en) 1998-01-20
    FR2744986A1 (en) 1997-08-22
    JPH09323759A (en) 1997-12-16
    EP0790193A1 (en) 1997-08-20
    DE69714313D1 (en) 2002-09-05
    FR2744986B1 (en) 1998-05-07

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