EP0292386A2 - Cover for closing a container, comprising a sealing area of thermoplastic material, and process for the manufacture of this cover - Google Patents

Cover for closing a container, comprising a sealing area of thermoplastic material, and process for the manufacture of this cover Download PDF

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Publication number
EP0292386A2
EP0292386A2 EP88401206A EP88401206A EP0292386A2 EP 0292386 A2 EP0292386 A2 EP 0292386A2 EP 88401206 A EP88401206 A EP 88401206A EP 88401206 A EP88401206 A EP 88401206A EP 0292386 A2 EP0292386 A2 EP 0292386A2
Authority
EP
European Patent Office
Prior art keywords
sealing
container
thermoplastic material
sealing zone
openings
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
EP88401206A
Other languages
German (de)
French (fr)
Other versions
EP0292386A3 (en
EP0292386B1 (en
Inventor
Robert Rebischung
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Amcor Flexibles Selestat SAS
Original Assignee
Alsacienne DAluminium
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alsacienne DAluminium filed Critical Alsacienne DAluminium
Priority to AT88401206T priority Critical patent/ATE102157T1/en
Publication of EP0292386A2 publication Critical patent/EP0292386A2/en
Publication of EP0292386A3 publication Critical patent/EP0292386A3/en
Application granted granted Critical
Publication of EP0292386B1 publication Critical patent/EP0292386B1/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
    • B65D77/2044—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure
    • B65D77/2048—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut
    • B65D77/2056—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut the cover being weakened
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
    • B65B7/2807—Feeding closures
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers
    • B65D2577/2025—Multi-layered container, e.g. laminated, coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers
    • B65D2577/2075—Lines of weakness or apertures
    • B65D2577/2091—Lines of weakness or apertures in cover
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062—Prior to assembly
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062—Prior to assembly
    • Y10T156/1064—Partial cutting [e.g., grooving or incising]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1084—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing of continuous or running length bonded web

Definitions

  • the present invention relates to a cover for closing by heat-sealing a container comprising a sealing zone of thermoplastic material delimited by an internal closed line and an external closed line, of the type comprising a sealing material, a varnish applied to the one of the faces of the sealing material, and an attached layer of thermoplastic material fixed in a separable manner on the sealing material and covering at least the part of the varnish which is intended to face the sealing zone of the container to be closed, as well as a process for manufacturing such a seal.
  • the present invention proposes more particularly to remedy this drawback and, to do this, it relates to a cover of the aforementioned type which is characterized in that the added layer has a thickness of the order of 100 to 1000 ⁇ (10 ⁇ 4 to 10 ⁇ 3 m), its thickness being chosen so that the thermoplastic material constituting it can, by locally melting when the container is closed by heat-sealing, encapsulate the traces of product reaching the sealing zone when the container is filled .
  • thermosealing of a container with the lid according to the invention can be carried out in a perfectly sealed manner.
  • the added layer and the sealing zone are both made of thermoplastic material, the latter, by melting locally under the effect of heat, encapsulates the traces of the product which are on the sealing zone and avoids therefore, at these traces, the formation of micro-channels which would promote the appearance of leaks.
  • the thermoplastic material forming the attached layer has a thickness of the order of 0.1 to 10 times the thickness of the sealing zone of the container. It is preferably the same as that forming the sealing zone of the container. It can for example be chosen from the group comprising polyvinyl chloride, polyethylene and polypropylene and have a thickness of the order of 100 to 1000 ⁇ (10 ⁇ 4 to 10 ⁇ 3 m). It can also be fixed on the sealing material with a varnish having a thickness of the order of 10 to 20 ⁇ (10 ⁇ 5 to 2.10 ⁇ 5 m).
  • the sealing material has a thickness of the order of 20 to 100 ⁇ (2.10 ⁇ 5 to 10 ⁇ 4 m) and can comprise at least one sheet of thermoplastic material and / or at least one metallic sheet.
  • the added layer covers the entire face of the sealing material which is intended to be turned towards the container and is precut along a line corresponding substantially to the internal closed line of the zone sealing the container.
  • the added layer can thus be torn along its precut line when the container is opened, its part located inside the internal closed line remaining integral with the sealing material.
  • the present invention also proposes to reduce as much as possible the production costs of the seal described above. To do this, it relates to a manufacturing process which is characterized in that it consists successively in producing in a strip of thermoplastic material a first series of openings whose periphery corresponds substantially to the closed line internally delimiting the area of sealing of the containers, fixing a strip of sealing material on the strip of thermoplastic material comprising the first series of openings, and making a second series of openings in the complex thus obtained whose periphery corresponds substantially to the closed line externally delimiting the sealing zone of the containers, the openings of the second series being produced in such a way that the openings of the first series are closed by the sealing material.
  • this process can consist successively of depositing against the bottom of a lower molding shell an element of sealing material whose dimensions correspond to those of the seal to be produced, to be applied against the lidding material element an upper molding shell having on its face turned towards said lidding material element a groove having an inlet whose dimensions correspond to those of the insert, to inject a thermoplastic material into the throat the upper molding shell to make the added layer, removing the upper molding shell after the setting of the thermoplastic material, and extracting the lower molding shell the cover thus produced.
  • the method of the invention may consist in producing the added layer by molding, preferably by injection, and in fixing on it an element of sealing material whose dimensions correspond to those of l seal to be made.
  • the present invention provides a process consisting successively of producing a series of thermoplastic material pre-cuts whose outline corresponds substantially to the closed line internally delimiting the sealing area of the containers, to fix a strip of sealing material on the strip of thermoplastic material comprising the pre-cuts, and to make in the complex thus obtained a series of openings whose periphery corresponds substantially to the closed line externally delimiting the sealing area of the containers, the openings being made so that the precuts are covered by the sealing material.
  • the container which can be seen in FIG. 1 comprises a peripheral rim 1 surrounding its inlet and is coated internally with a layer of thermoplastic material 2 extending over the peripheral rim 1 to form a sealing zone 3. It will be noted here that this zone can have a thickness of the order of 10 to 10,000 ⁇ (10 ⁇ 5 to 10 ⁇ 2 m).
  • This container which is entirely conventional, is closed by a cover 4 comprising a sealing material 5 bearing on its part overhanging the sealing zone 3 an attached layer 6 of thermoplastic material.
  • the attached layer 6 is fixed in a separable manner on the sealing material 5, by a varnish 7 having a thickness of the order of 10 to 20 ⁇ (10 ⁇ 5 to 2.10 ⁇ 5 m).
  • a varnish 7 having a thickness of the order of 10 to 20 ⁇ (10 ⁇ 5 to 2.10 ⁇ 5 m).
  • It can for example be made of polyvinyl chloride, polyethylene or polypropylene, the thermoplastic material constituting it being able or not to be the same as that used to form the sealing zone 3. Its thickness can moreover be between 100 and 1000 ⁇ (10 ⁇ 4 to 10 ⁇ 3 m).
  • the sealing material 5 can consist of a complex comprising at least one sheet of thermoplastic material and / or at least one sheet of aluminum and having a thickness of the order of 20 to 100 ⁇ (2.10 ⁇ 5 at 10 ⁇ 4 m).
  • the applied layer 6 of the seal 4 is applied to the sealing zone 3 of the container and the applied layer 6 and the sealing zone 3 are heated in order to make them melt with on either side of their contact surface and thus achieve their welding.
  • the thicknesses of the layer 6 and of the sealing zone 3 are significantly greater than that of the traces, possibly present on said sealing zone 3, of the product contained in the container.
  • heating of the added layer 6 and of the sealing zone 3 can advantageously be carried out by ultrasound.
  • the container that can be seen in Figure 2 is entirely of thermoplastic material and has a thickness of the order of 100 to 10,000 ⁇ (10 ⁇ 4 to 10 ⁇ 2 m). It comprises a peripheral rim forming a sealing zone 11 around its entry and is closed by a cover 12 in turn comprising an attached layer 13 fixed to a sealing material 14 by a layer of varnish 15.
  • the cover 12 is distinguished from cover 4 which has been described above only by the fact that the added layer 13 completely covers the face of the cover material 14 which faces the container, and is precut along a line 16 adjacent to the internal periphery of the sealing zone 11.
  • the installation visible in FIG. 3 has been developed to manufacture the cover 4 in series. It comprises a spindle 20 for receiving a coil 21 obtained by winding a strip of thermoplastic material 22 intended to form the added layer 6 of the lids 4, a cutting station 23 for producing in the strip 22 a succession of openings 24 whose dimensions correspond substantially to those of the opening of the containers to be closed, a pin 25 for receiving a coil 26 obtained by winding a strip 27 of sealing material, a sealing station 28 for fixing the perforated strip against one another 22 and the strip 27, a cutting station 29 for producing the lids 4 by producing in the strips 22 and 27, concentrically with the openings 24, a succession of openings 30 whose dimensions correspond substantially to those of the outer periphery of the rim 1 containers to be closed, a spindle 31 for winding up the strips 22 and 27 as they exit from the cutting station 29, and control means not shown for rotating the spindles 20, 2 5 and 30 in synchronism in the direction allowing the bands 22 and 27 to move in the same direction.
  • FIG. 3 could also, with slight modifications, be used to manufacture the cover 12 in series. It would indeed suffice to replace the cutting station 23 with a precut station capable of producing in the strip 22 precuts 16 whose contours would correspond substantially to that of the opening of the containers to be closed.
  • the mold visible in FIG. 4 has also been developed to manufacture the cover 4 in series. It comprises a lower shell 40 comprising a cavity 41 whose dimensions of the bottom are slightly greater than those of a cover 4, and an upper shell 42 shaped to penetrate with little play in the cavity 41, the shell 42 comprising on its face lower an annular groove 43 connected to channels 44 capable of injecting a thermoplastic material therein, the groove 43 having an inlet whose dimensions are substantially the same as those of the rim 1 of the containers to be closed.
  • the procedure is as follows: . is deposited on the bottom of the cavity 41 of the lower shell 40 an element of sealing material 45 whose dimensions correspond to those of the seal 4; . the upper shell 42 is applied against the element of sealing material 45; . a thermoplastic material is injected into the groove 43 of the upper shell 42 in order to produce the added layer 6 of the cover 4; . the upper shell 42 is extracted from the cavity 41 of the lower shell 40 after the thermoplastic material has set; and . the cover 4 thus produced is extracted from the lower shell 40.
  • cover 4 could be produced by first producing the added layer 6 by molding, for example by injection, then by fixing on said added layer an element of sealing material whose dimensions correspond to those of cover 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Closing Of Containers (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

A lid for closing, by thermosealing, a container having a thermoplastic material sealing zone (3) defined by an internal closed line and an external closed line, of the type comprising a closure material (5), a varnish (7) applied to one of the faces of the closure material and an added thermoplastic material layer (6) fixed separably to the closure material and covering at least a part of the varnish which is intended to face the sealing zone of the container to be closed, said lid being characterized in that the added layer (6) has a thickness of the order of 100 to 1000 mu (10-4 to 10-3 m), its thickness being chosen so that the thermoplastic material forming it may, by locally melting during closure of the container by thermosealing, encapsulate the traces of product finding its way on to the sealing zone during filling of the container.

Description

La présente invention concerne un opercule pour la fermeture par thermoscellage d'un récipient comprenant une zone de scellage en matière thermoplastique délimitée par une ligne fermée interne et une ligne fermée externe , du type comprenant un matériau d'operculage, un vernis appliqué sur l'une des faces du matériau d'operculage, et une couche rapportée en matière thermoplastique fixée de manière séparable sur le matériau d'operculage et recouvrant au moins la partie du vernis qui est destinée à faire face à la zone de scellage du récipient à fermer, ainsi qu'un procédé pour la fabrication d'un tel opercule.The present invention relates to a cover for closing by heat-sealing a container comprising a sealing zone of thermoplastic material delimited by an internal closed line and an external closed line, of the type comprising a sealing material, a varnish applied to the one of the faces of the sealing material, and an attached layer of thermoplastic material fixed in a separable manner on the sealing material and covering at least the part of the varnish which is intended to face the sealing zone of the container to be closed, as well as a process for manufacturing such a seal.

Il arrive relativement fréquemment, lors du remplissage des récipients du type précité, que des traces du produit à conditionner parviennent sur la zone de scellage. Ces traces ont malheureusement l'inconvénient d'empêcher la réalisation d'un scellage parfaitement étanche des opercules sur les récipients et par suite de favoriser une dégradation rapide du produit conditionné.Relatively frequently, when filling containers of the aforementioned type, traces of the product to be packaged reach the sealing zone. These traces unfortunately have the disadvantage of preventing the achievement of a perfectly tight seal of the lids on the containers and consequently of promoting rapid degradation of the packaged product.

La présente invention se propose plus particulièrement de remédier à cet inconvénient et, pour ce faire, elle a pour objet un opercule du type précité qui se caractérise en ce que la couche rapportée a une épaisseur de l'ordre de 100 à 1000 µ (10⁻⁴ à 10⁻³ m), son épaisseur étant choisie pour que la matière thermoplastique la constituant puisse, en fondant localement lors de la fermeture du récipient par thermoscellage, encapsuler les traces de produit parvenant sur la zone de scellage lors du remplissage du récipient.The present invention proposes more particularly to remedy this drawback and, to do this, it relates to a cover of the aforementioned type which is characterized in that the added layer has a thickness of the order of 100 to 1000 μ (10 ⁻⁴ to 10⁻³ m), its thickness being chosen so that the thermoplastic material constituting it can, by locally melting when the container is closed by heat-sealing, encapsulate the traces of product reaching the sealing zone when the container is filled .

La fermeture par thermoscellage d'un récipient avec l'opercule selon l'invention peut être réalisée de façon parfaitement étanche. En effet, comme la couche rapportée et la zone de scellage sont toutes les deux en matière thermoplastique, celle-ci, en fondant localement sous l'effet de la chaleur, encapsule les traces du produit qui se trouvent sur la zone de scellage et évite donc, au niveau de ces traces, la formation de micro-canaux qui favoriseraient l'apparition de défauts d'étanchéité.The thermosealing of a container with the lid according to the invention can be carried out in a perfectly sealed manner. In fact, since the added layer and the sealing zone are both made of thermoplastic material, the latter, by melting locally under the effect of heat, encapsulates the traces of the product which are on the sealing zone and avoids therefore, at these traces, the formation of micro-channels which would promote the appearance of leaks.

La matière thermoplastique formant la couche rapportée a une épaisseur de l'ordre de 0,1 à 10 fois l'épaisseur de la zone de scellage du récipient. Elle est de préférence la même que celle formant la zone de scellage du récipient. Elle peut par exemple être choisie dans le groupe comprenant le chlorure de polyvinyle, le polyéthylène et le polypropylène et avoir une épaisseur de l'ordre de 100 à 1 000 µ (10⁻⁴ à 10⁻³ m). Elle peut par ailleurs être fixée sur le matériau d'operculage par un vernis ayant une épaisseur de l'ordre de 10 à 20 µ (10⁻⁵ à 2.10⁻⁵ m).The thermoplastic material forming the attached layer has a thickness of the order of 0.1 to 10 times the thickness of the sealing zone of the container. It is preferably the same as that forming the sealing zone of the container. It can for example be chosen from the group comprising polyvinyl chloride, polyethylene and polypropylene and have a thickness of the order of 100 to 1000 μ (10⁻⁴ to 10⁻³ m). It can also be fixed on the sealing material with a varnish having a thickness of the order of 10 to 20 μ (10⁻⁵ to 2.10⁻⁵ m).

Quant au matériau d'operculage, il a une épaisseur de l'ordre de 20 à 100 µ (2.10⁻⁵ à 10⁻⁴ m) et peut comprendre au moins une feuille de matière thermoplastique et/ou au moins une feuille métallique.As for the sealing material, it has a thickness of the order of 20 to 100 μ (2.10⁻⁵ to 10⁻⁴ m) and can comprise at least one sheet of thermoplastic material and / or at least one metallic sheet.

Selon une variante de réalisation de l'opercule, la couche rapportée recouvre toute la face du matériau d'operculage qui est destinée à être tournée vers le récipient et est prédécoupée le long d'une ligne correspondant sensiblement à la ligne fermée interne de la zone de scellage du récipient.According to an alternative embodiment of the cover, the added layer covers the entire face of the sealing material which is intended to be turned towards the container and is precut along a line corresponding substantially to the internal closed line of the zone sealing the container.

La couche rapportée pourra ainsi se déchirer le long de sa ligne de prédécoupage lors de l'ouverture du récipient, sa partie située à l'intérieur de la ligne fermée interne demeurant solidaire du matériau d'operculage.The added layer can thus be torn along its precut line when the container is opened, its part located inside the internal closed line remaining integral with the sealing material.

La présente invention se propose également de réduire au maximum les coûts de production de l'opercule décrit ci-dessus. Pour ce faire, elle a pour objet un procédé de fabrication qui se caractérise en ce qu'il consiste successivement à réaliser dans une bande de matière thermoplastique une première série d'ouvertures dont la périphérie correspond sensiblement à la ligne fermée délimitant intérieurement la zone de scellage des récipients, à fixer une bande de matériau d'operculage sur la bande de matière thermoplastique comportant la première série d'ouvertures, et à réaliser dans le complexe ainsi obtenu une seconde série d'ouvertures dont la périphérie correspond sensiblement à la ligne fermée délimitant extérieurement la zone de scellage des récipients, les ouvertures de la seconde série étant réalisées de telle sorte que les ouvertures de la première série soient obturées par le matériau d'operculage.The present invention also proposes to reduce as much as possible the production costs of the seal described above. To do this, it relates to a manufacturing process which is characterized in that it consists successively in producing in a strip of thermoplastic material a first series of openings whose periphery corresponds substantially to the closed line internally delimiting the area of sealing of the containers, fixing a strip of sealing material on the strip of thermoplastic material comprising the first series of openings, and making a second series of openings in the complex thus obtained whose periphery corresponds substantially to the closed line externally delimiting the sealing zone of the containers, the openings of the second series being produced in such a way that the openings of the first series are closed by the sealing material.

Selon un mode de mise en oeuvre particulier, ce procédé peut consister successivement à déposer contre le fond d'une coquille inférieure de moulage un élément de matériau d'operculage dont les dimensions correspondent à celles de l'opercule à réaliser, à appliquer contre l'élément de matériau d'operculage une coquille supérieure de moulage comportant sur sa face tournée vers ledit élément de matériau d'operculage une gorge ayant une entrée dont les dimensions correspondent à celles de la pièce rapportée, à injecter une matière thermoplastique dans la gorge de la coquille supérieure de moulage pour réaliser la couche rapportée, à enlever la coquille supérieure de moulage après la prise de la matière thermoplastique, et à extraire de la coquille inférieure de moulage l'opercule ainsi réalisé.According to a particular embodiment, this process can consist successively of depositing against the bottom of a lower molding shell an element of sealing material whose dimensions correspond to those of the seal to be produced, to be applied against the lidding material element an upper molding shell having on its face turned towards said lidding material element a groove having an inlet whose dimensions correspond to those of the insert, to inject a thermoplastic material into the throat the upper molding shell to make the added layer, removing the upper molding shell after the setting of the thermoplastic material, and extracting the lower molding shell the cover thus produced.

Selon un autre mode de mise en oeuvre, le procédé de l'invention peut consister à réaliser la couche rapportée par moulage, de préférence par injection, et à fixer sur elle un élément de matériau d'operculage dont les dimensions correspondent à celles de l'opercule à réaliser.According to another embodiment, the method of the invention may consist in producing the added layer by molding, preferably by injection, and in fixing on it an element of sealing material whose dimensions correspond to those of l seal to be made.

Par ailleurs, pour fabriquer des opercules dont la couche rapportée recouvre toute la face du matériau d'operculage qui est destinée à être tournée vers le récipient à fermer, la présente invention propose un procédé consistant successivement à réaliser dans une bande de matière thermoplastique une série de prédécoupes dont le contour correspond sensiblement à la ligne fermée délimitant intérieurement la zone de scellage des récipients, à fixer une bande de matériau d'operculage sur la bande de matière thermoplastique comportant les prédécoupes, et à réaliser dans le complexe ainsi obtenu une série d'ouvertures dont la périphérie correspond sensiblement à la ligne fermée délimitant extérieurement la zone de scellage des récipients, les ouvertures étant réalisées de telle sorte que les prédécoupes soient recouvertes par le matériau d'operculage.Furthermore, to manufacture lids whose added layer covers the entire face of the lidding material which is intended to be turned towards the container to be closed, the present invention provides a process consisting successively of producing a series of thermoplastic material pre-cuts whose outline corresponds substantially to the closed line internally delimiting the sealing area of the containers, to fix a strip of sealing material on the strip of thermoplastic material comprising the pre-cuts, and to make in the complex thus obtained a series of openings whose periphery corresponds substantially to the closed line externally delimiting the sealing area of the containers, the openings being made so that the precuts are covered by the sealing material.

Deux modes d'exécution de la présente invention seront décrits ci-après à titre d'exemples nullement limitatifs en référence au dessin annexé dans lequel :

  • . la figure 1 est une vue en coupe schématique et partielle d'un récipient fermé par un opercule conforme à l'invention ;
  • . la figure 2 est une vue en coupe schématique et partielle d'un récipient fermé par un autre opercule conforme à l'invention ;
  • . la figure 3 est une vue en perspective schématique d'une installation pour la fabrication d'opercules tels que celui partiellement représenté sur la figure 1 ; et
  • . la figure 4 est une vue en perspective schématique d'un moule pour la fabrication d'opercules ayant la même structure que ceux produits par l'installation visible sur la figure 3.
Two embodiments of the present invention will be described below by way of non-limiting examples with reference to the appended drawing in which:
  • . Figure 1 is a schematic and partial sectional view of a container closed with a seal according to the invention;
  • . Figure 2 is a schematic and partial sectional view of a container closed by another cover according to the invention;
  • . Figure 3 is a schematic perspective view of an installation for the manufacture of lids such as that partially shown in Figure 1; and
  • . FIG. 4 is a schematic perspective view of a mold for the manufacture of lids having the same structure as those produced by the installation visible in FIG. 3.

Le récipient que l'on peut voir sur la figure 1 comprend un rebord périphérique 1 entourant son entrée et est revêtu intérieurement d'une couche de matière thermoplastique 2 se prolongeant sur le rebord périphérique 1 pour former une zone de scellage 3. On notera ici que cette zone peut avoir une épaisseur de l'ordre de 10 à 10.000 µ (10⁻⁵ à 10⁻² m).The container which can be seen in FIG. 1 comprises a peripheral rim 1 surrounding its inlet and is coated internally with a layer of thermoplastic material 2 extending over the peripheral rim 1 to form a sealing zone 3. It will be noted here that this zone can have a thickness of the order of 10 to 10,000 µ (10⁻⁵ to 10⁻² m).

Ce récipient, qui est tout à fait classique, est fermé par un opercule 4 comprenant un matériau d'operculage 5 portant sur sa partie surplombant la zone de scellage 3 une couche rapportée 6 en matière thermoplastique.This container, which is entirely conventional, is closed by a cover 4 comprising a sealing material 5 bearing on its part overhanging the sealing zone 3 an attached layer 6 of thermoplastic material.

La couche rapportée 6 est fixée de manière séparable sur le matériau d'operculage 5, par un vernis 7 ayant une épaisseur de l'ordre de 10 à 20 µ (10⁻⁵ à 2.10⁻⁵ m). Elle peut par exemple être en chlorure de polyvinyle, en polyéthylène ou en polypropylène, la matière thermoplastique la constituant pouvant ou non être la même que celle utilisée pour former la zone de scellage 3. Son épaisseur peut en outre être comprise entre 100 et 1 000 µ (10⁻⁴ à 10⁻³ m).The attached layer 6 is fixed in a separable manner on the sealing material 5, by a varnish 7 having a thickness of the order of 10 to 20 μ (10⁻⁵ to 2.10⁻⁵ m). It can for example be made of polyvinyl chloride, polyethylene or polypropylene, the thermoplastic material constituting it being able or not to be the same as that used to form the sealing zone 3. Its thickness can moreover be between 100 and 1000 µ (10⁻⁴ to 10⁻³ m).

Quant au matériau d'operculage 5, il peut être constitué par un complexe comprenant au moins une feuille de matière thermoplastique et/ou au moins une feuille d'aluminium et ayant une épaisseur de l'ordre de 20 à 100 µ (2.10⁻⁵ à 10⁻⁴ m).As for the sealing material 5, it can consist of a complex comprising at least one sheet of thermoplastic material and / or at least one sheet of aluminum and having a thickness of the order of 20 to 100 μ (2.10⁻⁵ at 10⁻⁴ m).

Pour fermer le récipient visible sur la figure 1, on applique la couche rapportée 6 de l'opercule 4 sur la zone de scellage 3 du récipient et l'on chauffe la couche rapportée 6 et la zone de scellage 3 afin de les faire fondre de part et d'autre de leur surface de contact et de réaliser ainsi leur soudage.To close the container visible in FIG. 1, the applied layer 6 of the seal 4 is applied to the sealing zone 3 of the container and the applied layer 6 and the sealing zone 3 are heated in order to make them melt with on either side of their contact surface and thus achieve their welding.

On notera ici que les épaisseurs de la couche 6 et de la zone de scellage 3 sont nettement plus grandes que celle des traces, éventuellement présentes sur ladite zone de scellage 3, du produit contenu dans le récipient.It will be noted here that the thicknesses of the layer 6 and of the sealing zone 3 are significantly greater than that of the traces, possibly present on said sealing zone 3, of the product contained in the container.

On notera également que le chauffage de la couche rapportée 6 et de la zone de scellage 3 peut avantageusement être réalisé par ultra-sons.It will also be noted that the heating of the added layer 6 and of the sealing zone 3 can advantageously be carried out by ultrasound.

Pour ouvrir le récipient portant l'opercule 4, il suffit bien entendu de séparer le matériau d'operculage 5 de la couche rapportée 6, ce qui ne pose aucune difficulté puisque le vernis 7 autorise son pelage.To open the container carrying the cover 4, it is of course sufficient to separate the sealing material 5 from the added layer 6, which poses no difficulty since the varnish 7 allows its peeling.

Le récipient que l'on peut voir sur la figure 2 est entièrement en matière thermoplastique et a une épaisseur de l'ordre de 100 à 10.000 µ (10⁻⁴ à 10⁻² m). Il comprend un rebord périphérique formant une zone de scellage 11 autour de son entrée et est fermé par un opercule 12 comprenant à son tour une couche rapportée 13 fixée à un matériau d'operculage 14 par une couche de vernis 15. En fait, l'opercule 12 se distingue de l'opercule 4 qui a été décrit ci-­dessus uniquement par le fait que la couche rapportée 13 recouvre entièrement la face du matériau d'operculage 14 qui est tournée vers le récipient, et est prédécoupée le long d'une ligne 16 adjacente à la périphérie interne de la zone de scellage 11.The container that can be seen in Figure 2 is entirely of thermoplastic material and has a thickness of the order of 100 to 10,000 µ (10⁻⁴ to 10⁻² m). It comprises a peripheral rim forming a sealing zone 11 around its entry and is closed by a cover 12 in turn comprising an attached layer 13 fixed to a sealing material 14 by a layer of varnish 15. In fact, the cover 12 is distinguished from cover 4 which has been described above only by the fact that the added layer 13 completely covers the face of the cover material 14 which faces the container, and is precut along a line 16 adjacent to the internal periphery of the sealing zone 11.

Comme l'opercule 12 peut être scellé de la même manière que l'opercule 4, on ne rappellera pas ici les opérations qu'il faut effectuer pour le fixer sur le récipient.As the cover 12 can be sealed in the same way as the cover 4, we will not recall here the operations that must be carried out to fix it on the container.

L'installation visible sur la figure 3 a été mise au point pour fabriquer l'opercule 4 en série. Elle comprend une broche 20 pour recevoir une bobine 21 obtenue en enroulant une bande de matière thermoplastique 22 destinée à former la couche rapportée 6 des opercules 4, un poste de découpage 23 pour réaliser dans la bande 22 une succession d'ouvertures 24 dont les dimensions correspondent sensiblement à celles de l'ouverture des récipients à fermer, une broche 25 pour recevoir une bobine 26 obtenue en enroulant une bande 27 en matériau d'operculage, un poste de scellage 28 pour fixer l'une contre l'autre la bande perforée 22 et la bande 27, un poste de découpage 29 pour produire les opercules 4 en réalisant dans les bandes 22 et 27, concentriquement aux ouvertures 24, une succession d'ouvertures 30 dont les dimensions correspondent sensiblement à celles de la périphérie extérieure du rebord 1 des récipients à fermer, une broche 31 pour enrouler les bandes 22 et 27 à leur sortie du poste de découpage 29, et des moyens de commande non représentés pour faire tourner les broches 20, 25 et 30 en synchronisme dans le sens permettant aux bandes 22 et 27 de se déplacer dans la même direction.The installation visible in FIG. 3 has been developed to manufacture the cover 4 in series. It comprises a spindle 20 for receiving a coil 21 obtained by winding a strip of thermoplastic material 22 intended to form the added layer 6 of the lids 4, a cutting station 23 for producing in the strip 22 a succession of openings 24 whose dimensions correspond substantially to those of the opening of the containers to be closed, a pin 25 for receiving a coil 26 obtained by winding a strip 27 of sealing material, a sealing station 28 for fixing the perforated strip against one another 22 and the strip 27, a cutting station 29 for producing the lids 4 by producing in the strips 22 and 27, concentrically with the openings 24, a succession of openings 30 whose dimensions correspond substantially to those of the outer periphery of the rim 1 containers to be closed, a spindle 31 for winding up the strips 22 and 27 as they exit from the cutting station 29, and control means not shown for rotating the spindles 20, 2 5 and 30 in synchronism in the direction allowing the bands 22 and 27 to move in the same direction.

L'installation représentée sur la figure 3 pourrait également, moyennant de faibles modifications, être utilisée pour fabriquer l'opercule 12 en série. Il suffirait en effet de remplacer le poste de découpage 23 par un poste de prédécoupage capable de réaliser dans la bande 22 des prédécoupes 16 dont les contours correspondraient sensiblement à celui de l'ouverture des récipients à fermer.The installation shown in FIG. 3 could also, with slight modifications, be used to manufacture the cover 12 in series. It would indeed suffice to replace the cutting station 23 with a precut station capable of producing in the strip 22 precuts 16 whose contours would correspond substantially to that of the opening of the containers to be closed.

Le moule visible sur la figure 4 a également été mis au point pour fabriquer l'opercule 4 en série. Il comprend une coquille inférieure 40 comportant une cavité 41 dont les dimensions du fond sont légèrement supérieures à celles d'un opercule 4, et une coquille supérieure 42 conformée pour pénétrer avec un faible jeu dans la cavité 41, la coquille 42 comportant sur sa face inférieure une gorge annulaire 43 reliée à des canaux 44 aptes à y injecter une matière thermoplastique, la gorge 43 ayant une entrée dont les dimensions sont sensiblement les mêmes que celles du rebord 1 des récipients à fermer.The mold visible in FIG. 4 has also been developed to manufacture the cover 4 in series. It comprises a lower shell 40 comprising a cavity 41 whose dimensions of the bottom are slightly greater than those of a cover 4, and an upper shell 42 shaped to penetrate with little play in the cavity 41, the shell 42 comprising on its face lower an annular groove 43 connected to channels 44 capable of injecting a thermoplastic material therein, the groove 43 having an inlet whose dimensions are substantially the same as those of the rim 1 of the containers to be closed.

Pour réaliser un opercule 4 avec le moule représenté sur la figure 4, on procède de la façon suivante :
    . on dépose sur le fond de la cavité 41 de la coquille inférieure 40 un élément de matériau d'operculage 45 dont les dimensions correspondent à celles de l'opercule 4 ;
    . on applique la coquille supérieure 42 contre l'élément de matériau d'operculage 45 ;
    . on injecte une matière thermoplastique dans la gorge 43 de la coquille supérieure 42 afin de réaliser la couche rapportée 6 de l'opercule 4 ;
    . on extrait la coquille supérieure 42 de la cavité 41 de la coquille inférieure 40 après la prise de la matière thermoplastique ; et
    . on extrait de la coquille inférieure 40 l'opercule 4 ainsi réalisé.To make a cover 4 with the mold shown in FIG. 4, the procedure is as follows:
. is deposited on the bottom of the cavity 41 of the lower shell 40 an element of sealing material 45 whose dimensions correspond to those of the seal 4;
. the upper shell 42 is applied against the element of sealing material 45;
. a thermoplastic material is injected into the groove 43 of the upper shell 42 in order to produce the added layer 6 of the cover 4;
. the upper shell 42 is extracted from the cavity 41 of the lower shell 40 after the thermoplastic material has set; and
. the cover 4 thus produced is extracted from the lower shell 40.

Pour être complet, on précisera que l'on pourrait réaliser l'opercule 4 en réalisant tout d'abord la couche rapportée 6 par moulage, par exemple par injection, puis en fixant sur ladite couche rapportée un élément de matériau d'operculage dont les dimensions correspondent à celles de l'opercule 4.To be complete, it will be specified that the cover 4 could be produced by first producing the added layer 6 by molding, for example by injection, then by fixing on said added layer an element of sealing material whose dimensions correspond to those of cover 4.

Claims (11)

1. Opercule pour la fermeture par thermoscellage d'un récipient comprenant une zone de scellage en matière thermoplastique (3, 11) délimitée par une ligne fermée interne et une ligne fermée externe , du type comprenant un matériau d'operculage (5, 14), un vernis (7, 15) appliqué sur l'une des faces du matériau d'operculage, et une couche rapportée (6, 13) en matière thermoplastique fixée de manière séparable sur le matériau d'operculage et recouvrant au moins la partie du vernis qui est destinée à faire face à la zone de scellage du récipient à fermer, caractérisé en ce que la couche rapportée (6, 13) a une épaisseur de l'ordre de 100 à 1000 µ (10⁻⁴ à 10⁻³ m), son épaisseur étant choisie pour que la matière thermoplastique la constituant puisse, en fondant localement lors de la fermeture du récipient par thermoscellage, encapsuler les traces de produit parvenant sur la zone de scellage lors du remplissage du récipient.1. Lid for heat-sealing the closure of a container comprising a sealing zone of thermoplastic material (3, 11) delimited by an internal closed line and an external closed line, of the type comprising a sealing material (5, 14) , a varnish (7, 15) applied to one of the faces of the sealing material, and an attached layer (6, 13) of thermoplastic material fixed in a separable manner on the sealing material and covering at least the part of the varnish which is intended to face the sealing zone of the container to be closed, characterized in that the added layer (6, 13) has a thickness of the order of 100 to 1000 µ (10⁻⁴ to 10⁻³ m ), its thickness being chosen so that the thermoplastic material constituting it can, by locally melting when the container is closed by heat-sealing, encapsulate the traces of product arriving on the sealing zone during filling of the container. 2. Opercule selon la revendication 1, caractérisé en ce que la matière thermoplastique formant la couche rapportée (6, 13) est la même que celle formant la zone de scellage (3, 11) du récipient.2. Lid according to claim 1, characterized in that the thermoplastic material forming the attached layer (6, 13) is the same as that forming the sealing zone (3, 11) of the container. 3. Opercule selon la revendication 1 ou 2, caractérisé en ce que la couche rapportée (13) recouvre toute la face du matériau d'operculage (14) qui est destinée à être tournée vers le récipient et est prédécoupée le long d'une ligne (16) correspondant sensiblement à la ligne fermée interne de la zone de scellage (11) du récipient.3. Lid according to claim 1 or 2, characterized in that the added layer (13) covers the entire face of the lidding material (14) which is intended to be turned towards the container and is precut along a line (16) corresponding substantially to the internal closed line of the sealing zone (11) of the container. 4. Opercule selon l'une quelconque des revendications précédentes, caractérisé en ce que la matière thermoplastique formant la couche rapportée (6, 13) est choisie dans le groupe comprenant le chlorure de polyvinyle, le polyéthylène et le polypropylène.4. Lid according to any one of the preceding claims, characterized in that the thermoplastic material forming the attached layer (6, 13) is chosen from the group comprising polyvinyl chloride, polyethylene and polypropylene. 5. Opercule selon l'une quelconque des revendications précédentes, caractérisé en ce que le matériau d'operculage (5, 14) a une épaisseur de l'ordre de 20 à 100 µ (2.10⁻⁵ à 10⁻⁴ m).5. Lid according to any one of the preceding claims, characterized in that the lidding material (5, 14) has a thickness of the order of 20 to 100 µ (2.10⁻⁵ to 10⁻⁴ m). 6. Opercule selon l'une quelconque des revendications précédentes, caractérisé en ce que le matériau d'operculage (5, 14) comprend au moins une feuille thermoplastique et/ou au moins une feuille métallique.6. Lid according to any one of the preceding claims, characterized in that the lidding material (5, 14) comprises at least one thermoplastic sheet and / or at least one metallic sheet. 7. Opercule selon l'une quelconque des revendications précédentes, caractérisé en ce que le vernis (7, 15) a une épaisseur de l'ordre de 10 à 20 µ (10⁻⁵ à 2.10⁻⁵ m).7. Lid according to any one of the preceding claims, characterized in that the varnish (7, 15) has a thickness of the order of 10 to 20 µ (10⁻⁵ to 2.10⁻⁵ m). 8. Procédé pour la fabrication d'opercules selon l'une quelconque des revendications 1, 2 et 4 à 7, caractérisé en ce qu'il consiste successivement à réaliser dans une bande de matière thermoplastique (22) une première série d'ouvertures (24) dont la périphérie correspond sensiblement à la ligne fermée délimitant intérieurement la zone de scellage (3) des récipients, à fixer une bande de matériau d'operculage (27) sur la bande de matière thermoplastique comportant la première série d'ouvertures (24), et à réaliser dans le complexe ainsi obtenu une seconde série d'ouvertures (30) dont la périphérie correspond sensiblement à la ligne fermée délimitant extérieurement la zone de scellage (3) des récipients, les ouvertures (30) de la seconde série étant réalisées de telle sorte que les ouvertures (24) de la première série soient obturées par le matériau d'operculage.8. A method for manufacturing lids according to any one of claims 1, 2 and 4 to 7, characterized in that it consists successively in producing in a strip of thermoplastic material (22) a first series of openings ( 24) whose periphery corresponds substantially to the closed line internally delimiting the sealing zone (3) of the containers, to fix a strip of sealing material (27) on the strip of thermoplastic material comprising the first series of openings (24 ), and to produce in the complex thus obtained a second series of openings (30) whose periphery corresponds substantially to the closed line externally delimiting the sealing zone (3) of the containers, the openings (30) of the second series being made so that the openings (24) of the first series are closed by the sealing material. 9. Procédé pour la fabrication d'opercules selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'il consiste successivement à réaliser dans une bande de matière thermoplastique (22) une série de prédécoupes (16) dont le contour correspond sensiblement à la ligne fermée délimitant intérieurement la zone de scellage (11) des récipients, à fixer une bande de matériau d'operculage (27) sur la bande de matière thermoplastique comportant les prédécoupes (16), et à réaliser dans le complexe ainsi obtenu une série d'ouvertures (30) dont la périphérie correspond sensiblement à la ligne fermée délimitant extérieurement la zone de scellage (11) des récipients, les ouvertures (30) étant réalisées de telle sorte que les prédécoupes soient recouvertes par le matériau d'operculage.9. A method for manufacturing lids according to any one of claims 1 to 7, characterized in that it consists successively in producing in a strip of thermoplastic material (22) a series of precuts (16) whose contour corresponds substantially to the closed line internally delimiting the sealing zone (11) of the containers, to fix a strip of sealing material (27) on the strip of thermoplastic material comprising the precuts (16), and to be produced in the complex thus obtained a series of openings (30) whose periphery corresponds substantially to the closed line externally delimiting the sealing zone (11) of the containers, the openings (30) being made so that the precuts are covered by the sealing material . 10. Procédé pour la fabrication d'un opercule selon l'une quelconque des revendications 1, 2 et 4 à 7, caractérisé en ce qu'il consiste successivement à déposer contre le fond d'une coquille inférieure de moulage (40) un élément de matériau d'operculage (45) dont les dimensions correspondent à celles de l'opercule (4) à réaliser, à appliquer contre l'élément de matériau d'operculage (45) une coquille supérieure de moulage (42) comportant sur sa face tournée vers ledit élément de matériau d'operculage (45) une gorge (43) ayant une entrée dont les dimensions correspondent à celles de la couche rapportée (6), à injecter une matière thermoplastique dans la gorge (43) de la coquille supérieure de moulage (42) pour réaliser la couche rapportée (6), à enlever la coquille supérieure de moulage (42) aprés la prise de la matière thermoplastique, et à extraire de la coquille inférieure de moulage (40) l'opercule (4) ainsi réalisé.10. A method for manufacturing a cover according to any one of claims 1, 2 and 4 to 7, characterized in that it consists successively of depositing against the bottom of a lower molding shell (40) an element of lidding material (45) whose dimensions correspond to those of the lid (4) to be produced, to be applied against the element of lidding material (45) an upper molding shell (42) having on its face turned towards said element of sealing material (45) a groove (43) having an inlet whose dimensions correspond to those of the attached layer (6), to inject a thermoplastic material into the groove (43) of the upper shell of molding (42) to produce the added layer (6), to remove the upper molding shell (42) after the setting of the thermoplastic material, and to extract from the lower molding shell (40) the cover (4) thus realized. 11. Procédé pour la fabrication d'un opercule selon l'une quelconque des revendications 1, 2 et 4 à 7, caractérisé en ce qu'il consiste à réaliser la couche rapportée par moulage et à fixer sur elle un élément de matériau d'operculage dont les dimensions correspondent à celles de l'opercule à réaliser.11. A method for manufacturing a cover according to any one of claims 1, 2 and 4 to 7, characterized in that it consists in producing the attached layer by molding and in fixing on it an element of material of lidding whose dimensions correspond to those of the lidding to be produced.
EP88401206A 1987-05-20 1988-05-18 Cover for closing a container, comprising a sealing area of thermoplastic material, and process for the manufacture of this cover Expired - Lifetime EP0292386B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88401206T ATE102157T1 (en) 1987-05-20 1988-05-18 CAP FOR A CONTAINER CONTAINING A THERMOPLASTIC SEALING ZONE AND PROCESS FOR ITS MANUFACTURE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8707077 1987-05-20
FR8707077A FR2615488B1 (en) 1987-05-20 1987-05-20 LID FOR CLOSING A CONTAINER COMPRISING A SEALING AREA IN THERMOPLASTIC MATERIAL, AND METHOD FOR MANUFACTURING THIS LID

Publications (3)

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EP0292386A2 true EP0292386A2 (en) 1988-11-23
EP0292386A3 EP0292386A3 (en) 1989-01-11
EP0292386B1 EP0292386B1 (en) 1994-03-02

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EP88401206A Expired - Lifetime EP0292386B1 (en) 1987-05-20 1988-05-18 Cover for closing a container, comprising a sealing area of thermoplastic material, and process for the manufacture of this cover

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US (2) US4830215A (en)
EP (1) EP0292386B1 (en)
JP (1) JPS6470368A (en)
AT (1) ATE102157T1 (en)
AU (2) AU604320B2 (en)
CA (1) CA1312561C (en)
DE (1) DE3888016D1 (en)
FR (1) FR2615488B1 (en)

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US20160207646A1 (en) * 2015-01-16 2016-07-21 Berry Plastics Corporation Package with lid-sealing system

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FR2545453A1 (en) * 1983-04-23 1984-11-09 Terumo Corp PACKAGING AND METHOD OF MANUFACTURING
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WO1986003174A1 (en) * 1984-11-28 1986-06-05 Elopak A/S Fluid-tight sealed container with lid

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FR2545453A1 (en) * 1983-04-23 1984-11-09 Terumo Corp PACKAGING AND METHOD OF MANUFACTURING
FR2551031A1 (en) * 1983-08-24 1985-03-01 Alsacienne Aluminium PEEL OPENING CONTAINER AND PROCESS FOR PRODUCING CLOSURE ELEMENTS THEREOF
EP0135431A1 (en) * 1983-08-24 1985-03-27 Societe Alsacienne D'aluminium Manufacturing process for container lids to be opened by peeling, and lids obtained by the realisation of this method
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FR2686578A1 (en) * 1992-01-27 1993-07-30 Alsacienne Aluminium CONTAINER, IN PARTICULAR POT OR TRAY, COMPRISING A REFERMETURE OPERATOR PROVIDED WITH A PERMANENT ADHERENT POWERTRATE LAYER.
EP0554152A1 (en) * 1992-01-27 1993-08-04 SOCIETE ALSACIENNE D'ALUMINIUM Société Anonyme Container having a recloseable membrane provided with a layer of permanent adhesive
WO1994012405A2 (en) * 1992-12-03 1994-06-09 Techne (Cambridge) Limited Closure means, containers and methods of closure
WO1994012405A3 (en) * 1992-12-03 1994-07-21 Techne Cambridge Ltd Closure means, containers and methods of closure
EP0847933A1 (en) * 1996-12-11 1998-06-17 Alusuisse Technology & Management AG Lid material
US6308853B1 (en) 1998-09-01 2001-10-30 Alusuisse Technology & Management, Ltd. Lid material
US6722272B2 (en) 1998-09-01 2004-04-20 Alcan Technology & Management Ltd. Lid material

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CA1312561C (en) 1993-01-12
EP0292386A3 (en) 1989-01-11
ATE102157T1 (en) 1994-03-15
US4830215A (en) 1989-05-16
AU6094490A (en) 1990-11-15
EP0292386B1 (en) 1994-03-02
AU604320B2 (en) 1990-12-13
AU616851B2 (en) 1991-11-07
AU1643388A (en) 1988-11-24
DE3888016D1 (en) 1994-04-07
JPS6470368A (en) 1989-03-15
FR2615488A1 (en) 1988-11-25
FR2615488B1 (en) 1990-05-18
US4919742A (en) 1990-04-24

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