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EP0515260A1 - Screw cap with improved impermeability to gases - Google Patents

Screw cap with improved impermeability to gases Download PDF

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Publication number
EP0515260A1
EP0515260A1 EP92401353A EP92401353A EP0515260A1 EP 0515260 A1 EP0515260 A1 EP 0515260A1 EP 92401353 A EP92401353 A EP 92401353A EP 92401353 A EP92401353 A EP 92401353A EP 0515260 A1 EP0515260 A1 EP 0515260A1
Authority
EP
European Patent Office
Prior art keywords
outer shell
inner shell
disc
shells
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
EP92401353A
Other languages
German (de)
French (fr)
Other versions
EP0515260B1 (en
Inventor
Jacques Obadia
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.)
Rical SA
Original Assignee
Rical SA
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Filing date
Publication date
Application filed by Rical SA filed Critical Rical SA
Priority to AT92401353T priority Critical patent/ATE100775T1/en
Publication of EP0515260A1 publication Critical patent/EP0515260A1/en
Application granted granted Critical
Publication of EP0515260B1 publication Critical patent/EP0515260B1/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
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
    • B65D41/3423—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt
    • B65D41/3428—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt the tamper element being integrally connected to the closure by means of bridges
    • 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
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
    • B65D41/0492—Threaded or like caps or cap-like covers secured by rotation formed by several elements connected together

Definitions

  • the present invention relates to a screw cap capsule comprising a cup-shaped body comprising on its side wall a female thread cooperating with a male thread of the neck of the container, and on its bottom sealing means cooperating with the neck of the container.
  • the known closure caps of this type are generally one-piece plastic capsules.
  • the most used plastics are polyethylene, that is to say a relatively flexible material, and more rigid polypropylene.
  • polyethylene is generally used for non-carbonated or slightly carbonated beverages
  • polypropylene is used for highly carbonated beverages because of its better impermeability to gases.
  • a closure cap made of a thermoplastic material permeable to oxygen, for example polypropylene, the bottom of which is covered. internally of a sheet of complex (paper, chlorinated rubber, PVC) impermeable to oxygen, a plastisol seal being cast on said sheet of complex.
  • this capsule is not always satisfactory, in particular in the case of drinks, the complex sheet being in contact with the content of the container blocked by the capsule.
  • Each of the two shells can therefore be made of an optimal material taking into account the function that it must fulfill on the capsule.
  • polyethylene that is to say a flexible material and of low hardness
  • the outer shell can be made of a hard and rigid material which also offers good resistance characteristics to mechanical stresses which could compromise the seal if they were applied to a one-piece flexible plastic capsule.
  • the reduced gas impermeability of these capsules formed from two shells is often not satisfactory.
  • the present invention relates to a closure cap of the type with two nested shells which, while being simple to manufacture and at a reduced cost price, ensures both good liquid tightness and good gas impermeability and can be used without problems for the most diverse products.
  • the gas impermeability is ensured solely or mainly by a disc with a gas barrier effect interposed between the bottom of the outer shell and the bottom of the outer shell.
  • this disc is trapped between the inner shell and the outer shell, thereby being isolated and protected both from the product contained in the container, thanks to the inner shell, and from the outside by the outer shell.
  • This disc instead of being simply placed between the bottoms of the two shells, could also be fixed internally on the bottom of the outer shell, for example by gluing or welding, preferably by ultrasound. Likewise, this disc could be fixed by gluing or by welding, preferably by ultrasound, outside the bottom of the inner shell.
  • Another possibility is to ensure that said disc is molded by the material of the outer shell, or of the inner shell, which eliminates any subsequent fixing.
  • the disc in question may advantageously be formed from a sheet of complex, for example a sheet of metallized plastic.
  • this sheet of complex must be bonded by molding or welding to the outer shell and / or the inner shell, it must include, on the side of the shell to which it is to be bonded, a material suitable for bonding by fusion or by welding with the material of the hull in question.
  • the screw closure cap 1 as illustrated in FIG. 1 consists of an outer shell 2 in the form of a bucket and an inner shell 3 also having a general shape of a bucket, the two shells 2 and 3 being fitted one inside the other.
  • the outer shell 2 is produced by injection molding in a relatively hard plastic material such as polypropylene. It has, on its side wall 4, an external knurling 5 as well as an internal knurling 6 consisting of grooves and ribs parallel to the axis of the capsule.
  • a disc 7 consisting of a complex of plastic and metal, preferably a metallized polypropylene sheet, internally covers the bottom B of the outer shell 2.
  • the disc 7 can preferably be overmolded by the plastic of the outer shell 2 .
  • the inner shell 3 produced by molding, preferably by injection, from a flexible plastic material such as polyethylene, has on its bottom 9 an annular internal depression 10, known per se, whose outer flank 11 is intended to cooperate with the inside of the neck of a butcher container.
  • the side wall 12 of the inner shell 3 externally comprises an axial knurling 13 cooperating with the internal axial knurling 6 of the outer shell 2, when the two shells 2, 3 are fitted one inside the other, and internally a female thread 14 intended to cooperate with the male thread of the neck, not shown, of the stopper container.
  • the inner diameter of the outer shell 2 and the outer diameter of the inner shell 3, on the lower cylindrical parts of the side walls 4, 12 of these shells, are chosen so that the two shells 2, 3 can be made axially integral l 'from one another by simple force fitting, the two shells 2, 3 being moreover integral in rotation with one another thanks to the interpenetration of their knurls 6, 13.
  • the side wall 4 of the inner shell 3 comprises a tamper-evident ring 15 of known type connected by frangible bridges 16 to the shell 3.
  • the ring 15 has a circumferential row flexible lugs 17 intended to cooperate, being turned towards the bottom of the capsule 1, with a not shown bead provided on the neck of the container, below the net, so that after the assembly of the whole of the capsule 1 on the neck of the container, the first unscrewing of the capsule 1 causes the bridges 16 to rupture, therefore at least partial detachment of the ring 15, which clearly indicates visible and irreversible that the container has undergone a first opening or attempted opening.
  • the capsule 101 also consists of an outer shell 102 and an inner shell 103.
  • the external shell 102 comprises, in a similar manner to the external shell 2 of FIG. 1, a side wall 104 with an external knurling 105 and an internal knurling 106, as well as a disc 107 with gas barrier effect on the internal face from its bottom 108.
  • the interior shell 103 differs from the interior shell 3 of the capsule 1 according to FIG. 1 only by the presence of a sealing skirt 110 projecting from the bottom 109 of the shell 103 to cooperate with the interior face of the neck 111 d 'a container.
  • a side wall 112 provided with an external knurling 113 and a female thread 114 cooperating with the male thread 119 provided on the neck of the container.
  • the side wall 112 of the inner shell 103 carries a tamper-evident ring 115 which is here shown in the position in which its tabs 117 cooperate with the bead 118 of the neck of the container to be capped.
  • the barrier effect disc 7, 107 interposed between the bottoms B, 9 and 108, 109 of the two shells 102 and 103 can be fixed, for example by ultra welding -sons to one and / or the other of the two shells 2, 3 and 102, 103. It is also possible to overmold the disc 7, 107 by the material of the outer shell 2, 102, during molding by injection of the latter. To allow the establishment of a connection by fusion of the disc 7, 107 with the outer shell 2, 102, it is necessary to provide on this disc 7, 107 whose barrier effect can preferably be obtained by a metal layer, a layer of a plastic material suitable for a fusion bond with the material of said shell. It is the same when the disc 7, 107 must be connected to the inner shell 3, 103.
  • the capsule 201 of FIG. 3 comprises an outer shell 202 and an inner shell 203 which, fitted one inside the other, are secured to one another axially by a circumferential groove 206 provided internally in the side wall 204 of the outer shell 202, externally provided with a knurling 205, and by a bead 213 provided externally on the side wall 212 of the inner shell 203, the bead 213 being snapped into the groove 206 at the end of fitting of the two shells l 'one in the other.
  • the two shells 202 and 203 are made integral with one another in the circumferential direction by teeth 21B provided on the groove 206 and on the bead 213.
  • the sealing means 210 of the inner shell 203 which has a female thread 214 on its side wall 212 extended by a tamper-evident ring 215 here comprise a skirt 211 to l 'lower end which connects the bottom 209 in the form of a flat plate.
  • the disc 207 connected to the inner face of the bottom 208 of the outer shell 202 is thus spaced from the bottom 209 of the inner shell.
  • sealing means other than the annular depression 10 according to FIG. 1, the skirt 110 according to FIG. 2 or the plate skirt 210 according to FIG. 3 can be provided on the inner shell 3, 103, 203 to seal the neck of the container to be capped.
  • the manufacture of the outer shell 2, 102, 202 is extremely simple and can be carried out at very high speed, due to the absence of an internal thread. However, it is precisely because of the female thread that the demoulding of the relatively rigid one-piece plastic capsules leads to a significant reduction in the production rate.
  • the two shells can be made of materials of different colors, which not only gives a pleasant appearance to the capsule (tamper-evident ring of a color different from the remaining part visible, namely the outer shell), but still makes any attempt to open the container more apparent.
  • the disc 7, 107, 207 is defined as being of a material with a gas barrier effect, this barrier effect also applies to vapors, aromas, odors and other volatile substances.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Materials For Medical Uses (AREA)
  • Packages (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Taps Or Cocks (AREA)

Abstract

Screw-seal capsule (screw-cap) composed of two cup-shaped shells (2, 3), made integral by fitting one into the other, the inner shell (3) being made from a flexible plastic material and comprising a female thread (14) and leaktightness means (10), and the outer shell (2) being made from a hard plastic material. A disc (7), made from a gas-barrier material is inserted between the bottoms (8, 9) of the outer shell and of the inner shell. Application: in particular to drinks and other products which are sensitive to gas exchanges with the outside. <IMAGE>

Description

La présente invention se rapporte à une capsule de bouchage à vis comprenant un corps en forme de godet comportant sur sa paroi latérale un filet femelle coopérant avec un filet mâle du col du récipient, et sur son fond des moyens d'étanchéité coopérant avec le goulot du récipient.The present invention relates to a screw cap capsule comprising a cup-shaped body comprising on its side wall a female thread cooperating with a male thread of the neck of the container, and on its bottom sealing means cooperating with the neck of the container.

Les capsules de bouchage connues de ce type sont généralement des capsules monopièces en matière plastique. Les matières plastiques les plus utilisées sont le polyéthylène, c'est-à-dire une matière relativement souple, et le polypropylène plus rigide. Dans le cas des boissons, le polyéthylène est généralement utilisé pour des boissons non carbonatées ou légèrement carbonatées, tandis que le polypropylène est utilisé pour les boissons fortement carbonatées en raison de sa meilleure imperméabilité aux gaz.The known closure caps of this type are generally one-piece plastic capsules. The most used plastics are polyethylene, that is to say a relatively flexible material, and more rigid polypropylene. In the case of beverages, polyethylene is generally used for non-carbonated or slightly carbonated beverages, while polypropylene is used for highly carbonated beverages because of its better impermeability to gases.

Cependant, il existe de nombreux cas de conditionnement où l'imperméabilité aux gaz procurée par les capsules en polypropylène est encore insuffisante. Il en est ainsi lors du conditionnement de produits sensibles à l'action d'oxydation de l'oxygène de l'air (corps gras, sauces, jus de fruits), responsable d'une altération organoleptique qui peut rendre le produit rapidement inconsommable. Il en est de même pour la conservation de la teneur en CO₂ des boissons fortement carbonatées. Un autre problème consiste dans les pertes d'aromes et de substances volatiles des épices et huiles essentielles. Enfin, les défauts d'imperméabilité aux gaz entraînent des risques de captation d'odeurs indésirables par un produit tel que de l'eau en bouteilles plastiques, au cours du stockage ou du transport en espace confiné.However, there are many cases of packaging where the gas impermeability provided by the polypropylene capsules is still insufficient. This is so during the packaging of products sensitive to the oxidation action of oxygen in the air (fatty substances, sauces, fruit juices), responsible for an organoleptic alteration which can quickly make the product unaffectable. The same is true for the conservation of the CO₂ content of highly carbonated drinks. Another problem is the loss of aromas and volatile substances from spices and essential oils. Finally, defects in impermeability to gases entail risks of picking up undesirable odors by a product such as water in plastic bottles, during storage or transport in confined space.

Pour tenter de résoudre ces problèmes, on a déjà proposé, par exemple selon la demande de brevet européen no 0 280 168, une capsule de bouchage réalisée en une matière thermoplastique perméable à l'oxygène, par exemple en polypropylène, dont le fond est recouvert intérieurement d'une feuille de complexe (papier, caoutchouc chloré, PVC) imperméable à l'oxygène, un joint de plastisol étant coulé sur ladite feuille de complexe. Toutefois, cette capsule ne donne pas toujours satisfaction, notamment dans le cas de boissons, la feuille de complexe étant en contact avec le contenu du récipient bouché par la capsule.To try to solve these problems, we have already proposed, for example according to European patent application No. 0 280 168, a closure cap made of a thermoplastic material permeable to oxygen, for example polypropylene, the bottom of which is covered. internally of a sheet of complex (paper, chlorinated rubber, PVC) impermeable to oxygen, a plastisol seal being cast on said sheet of complex. However, this capsule is not always satisfactory, in particular in the case of drinks, the complex sheet being in contact with the content of the container blocked by the capsule.

Par ailleurs, il a déjà été proposé, par exemple par le brevet français no 1 197 200, de réaliser une capsule de bouchage à vis à partir de deux coques en forme de godet emboîtées l'une dans l'autre, la coque intérieure étant constituée d'une matière plastique souple et comportant sur sa paroi latérale un filet femelle susceptible de coopérer avec un filet mâle du col du récipient, et sur son fond des moyens d'étanchéité susceptibles de coopérer avec le goulot du récipient, et la coque extérieure étant constituée d'une matière plastique dure.Furthermore, it has already been proposed, for example by French Patent No. 1,197,200, to produce a screw cap capsule from two cup-shaped shells fitted one inside the other, the inner shell being made of a flexible plastic material and comprising on its side wall a female thread capable of cooperating with a male thread of the neck of the container, and on its bottom sealing means capable of cooperating with the neck of the container, and the outer shell being made of hard plastic.

Chacune des deux coques peut donc être réalisée dans un matériau optimal compte tenu de la fonction qu'elle doit remplir sur la capsule. Ainsi, afin d'obtenir une bonne étanchéité aux liquides, l'utilisation du polyéthylène, c'est-à-dire un matériau souple et de faible dureté, convient parfaitement pour la coque intérieure qui est en contact avec le produit conditionné et avec le goulot du récipient et qui, du fait de sa souplesse, s'adapte bien aux défauts que peut également présenter le récipient. Par contre, la coque extérieure peut être réalisée en un matériau dur et rigide offrant par ailleurs de bonnes caractéristiques de tenue aux sollicitations mécaniques qui pourraient compromettre l'étanchéité si elles s'exerçaient sur une capsule monopièce en matière plastique souple. Cependant, l'imperméabilité réduite aux gaz de ces capsules formées de deux coques ne donne souvent pas satisfaction.Each of the two shells can therefore be made of an optimal material taking into account the function that it must fulfill on the capsule. Thus, in order to obtain a good liquid tightness, the use of polyethylene, that is to say a flexible material and of low hardness, is perfectly suitable for the inner shell which is in contact with the packaged product and with the neck of the container and which, due to its flexibility, adapts well to the defects which the container may also have. On the other hand, the outer shell can be made of a hard and rigid material which also offers good resistance characteristics to mechanical stresses which could compromise the seal if they were applied to a one-piece flexible plastic capsule. However, the reduced gas impermeability of these capsules formed from two shells is often not satisfactory.

La présente invention vise une capsule de bouchage du type à deux coques emboîtées qui, tout en étant d'une fabrication simple et d'un prix de revient réduit, assure à la fois une bonne étanchéité aux liquides et une bonne imperméabilité aux gaz et puisse être utilisée sans problèmes pour les produits les plus divers.The present invention relates to a closure cap of the type with two nested shells which, while being simple to manufacture and at a reduced cost price, ensures both good liquid tightness and good gas impermeability and can be used without problems for the most diverse products.

Sur la capsule de bouchage conforme à l'invention, l'imperméabilité aux gaz est assurée uniquement ou principalement par un disque à effet de barrière aux gaz intercalé entre le fond de la coque extérieure et le fond de la coque extérieure.On the closure cap according to the invention, the gas impermeability is ensured solely or mainly by a disc with a gas barrier effect interposed between the bottom of the outer shell and the bottom of the outer shell.

Ainsi, ce disque se trouve emprisonné entre la coque intérieure et la coque extérieure, en étant de ce fait isolé et protégé à la fois par rapport au produit contenu dans le récipient, grâce à la coque intérieure, et par rapport à l'extérieur par la coque extérieure.Thus, this disc is trapped between the inner shell and the outer shell, thereby being isolated and protected both from the product contained in the container, thanks to the inner shell, and from the outside by the outer shell.

Ce disque, au lieu d'être simplement placé entre les fonds des deux coques, pourrait également être fixé intérieurement sur le fond de la coque extérieure, par exemple par collage ou par soudage, de préférence par ultra-sons. De même, ce disque pourrait être fixé par collage ou par soudage, de préférence par ultra-sons, extérieurement au fond de la coque intérieure.This disc, instead of being simply placed between the bottoms of the two shells, could also be fixed internally on the bottom of the outer shell, for example by gluing or welding, preferably by ultrasound. Likewise, this disc could be fixed by gluing or by welding, preferably by ultrasound, outside the bottom of the inner shell.

Une autre possibilité consiste à faire en sorte que ledit disque soit surmoulé par la matière de la coque extérieure, ou de la coque intérieure, ce qui supprime toute fixation ultérieure.Another possibility is to ensure that said disc is molded by the material of the outer shell, or of the inner shell, which eliminates any subsequent fixing.

Le disque en question peut être avantageusement formé d'une feuille de complexe, par exemple une feuille de matière plastique métallisée. Lorsque cette feuille de complexe doit être liée par moulage ou par soudage à la coque extérieure et/ou à la coque intérieure, elle doit comporter, du cOté de la coque à laquelle elle doit être liée, une matière se prêtant à une liaison par fusion ou par soudage avec la matière de la coque en question.The disc in question may advantageously be formed from a sheet of complex, for example a sheet of metallized plastic. When this sheet of complex must be bonded by molding or welding to the outer shell and / or the inner shell, it must include, on the side of the shell to which it is to be bonded, a material suitable for bonding by fusion or by welding with the material of the hull in question.

En se référant aux dessins annexés, on va décrire ci-après plus en détail plusieurs modes de réalisation illustratifs et non limitatifs d'une capsule à vis conforme à l'invention; sur les dessins:

  • la figure 1 est une vue latérale, partiellement en coupe, d'un premier mode de réalisation d'une capsule conforme à l'invention;
  • la figure 2 est une coupe axiale d'une deuxième mode de réalisation d'une capsule conforme à l'invention, en position de bouchage sur un col de bouteille;
  • la figure 3 est une coupe axiale d'un troisième mode de réalisation.
Referring to the accompanying drawings, several more illustrative and non-limiting embodiments of a screw cap according to the invention will be described below in more detail; on the drawings:
  • Figure 1 is a side view, partially in section, of a first embodiment of a capsule according to the invention;
  • Figure 2 is an axial section of a second embodiment of a capsule according to the invention, in the stopper position on a bottle neck;
  • Figure 3 is an axial section of a third embodiment.

La capsule de bouchage à vis 1 telle qu'illustrée par la figure 1 se compose d'une coque extérieure 2 en forme de godet et d'une coque intérieure 3 ayant également une forme générale en godet, les deux coques 2 et 3 étant emboitées l'une dans l'autre.The screw closure cap 1 as illustrated in FIG. 1 consists of an outer shell 2 in the form of a bucket and an inner shell 3 also having a general shape of a bucket, the two shells 2 and 3 being fitted one inside the other.

La coque extérieure 2 est réalisée par moulage par injection en une matière plastique relativement dure telle que le polypropylène. Elle comporte, sur sa paroi latérale 4, un moletage extérieur 5 ainsi qu'un moletage intérieur 6 constitué de rainures et de nervures parallèles à l'axe de la capsule.The outer shell 2 is produced by injection molding in a relatively hard plastic material such as polypropylene. It has, on its side wall 4, an external knurling 5 as well as an internal knurling 6 consisting of grooves and ribs parallel to the axis of the capsule.

Un disque 7 constitué par un complexe de matière plastique et de métal, de préférence une feuille de polypropylène métallisée, recouvre intérieurement le fond B de la coque extérieure 2. Le disque 7 peut être de préférence surmoulé par la matière plastique de la coque extérieure 2.
La coque intérieure 3 réalisée par moulage, de préférence par injection, à partir d'une matière plastique souple telle que le polyéthylène, comporte sur son fond 9 une dépression intérieure annulaire 10, connue en soi, dont le flanc extérieur 11 est destiné à coopérer avec la face intérieure du goulot d'un récipient à boucher. La paroi latérale 12 de la coque intérieure 3 comporte extérieurement un moletage axial 13 coopérant avec le moletage axial intérieur 6 de la coque extérieure 2, lors de l'emboîtement des deux coques 2, 3 l'une dans l'autre, et intérieurement un filet femelle 14 destiné à coopérer avec le filet mâle du col non représenté du récipient à boucher.A disc 7 consisting of a complex of plastic and metal, preferably a metallized polypropylene sheet, internally covers the bottom B of the outer shell 2. The disc 7 can preferably be overmolded by the plastic of the outer shell 2 .
The inner shell 3 produced by molding, preferably by injection, from a flexible plastic material such as polyethylene, has on its bottom 9 an annular internal depression 10, known per se, whose outer flank 11 is intended to cooperate with the inside of the neck of a butcher container. The side wall 12 of the inner shell 3 externally comprises an axial knurling 13 cooperating with the internal axial knurling 6 of the outer shell 2, when the two shells 2, 3 are fitted one inside the other, and internally a female thread 14 intended to cooperate with the male thread of the neck, not shown, of the stopper container.

Le diamètre intérieur de la coque extérieure 2 et le diamètre extérieur de la coque intérieure 3, sur les parties cylindriques inférieures des parois latérales 4, 12 de ces coques, sont choisis de manière que les deux coques 2, 3 puissent être rendues solidaires axialement l'un de l'autre par simple emboîtement à force, les deux coques 2, 3 étant par ailleurs solidaires en rotation l'une de l'autre grâce à l'interpénétration de leurs moletages 6, 13.The inner diameter of the outer shell 2 and the outer diameter of the inner shell 3, on the lower cylindrical parts of the side walls 4, 12 of these shells, are chosen so that the two shells 2, 3 can be made axially integral l 'from one another by simple force fitting, the two shells 2, 3 being moreover integral in rotation with one another thanks to the interpenetration of their knurls 6, 13.

A son extrémité inférieure, la paroi latérale 4 de la coque intérieure 3 comporte une bague d'inviolabilité 15 de type connu en soi reliée par des ponts 16 frangibles à la coque 3. Dans l'exemple représenté, la bague 15 comporte une rangée circonférentielle de pattes 17 flexibles destinées à coopérer, en étant retournées vers le fond de la capsule 1, avec un bourrelet non représenté prévu sur le col du récipient, en dessous du filet, de manière qu'après mise en place de l'ensemble de la capsule 1 sur le col du récipient, le premier dévissage de la capsule 1 provoque une rupture des ponts 16, donc un détachement au moins partiel de la bague 15, ce qui indique de façon nettement visible et irréversible que le récipient a subi une première ouverture ou tentative d'ouverture.At its lower end, the side wall 4 of the inner shell 3 comprises a tamper-evident ring 15 of known type connected by frangible bridges 16 to the shell 3. In the example shown, the ring 15 has a circumferential row flexible lugs 17 intended to cooperate, being turned towards the bottom of the capsule 1, with a not shown bead provided on the neck of the container, below the net, so that after the assembly of the whole of the capsule 1 on the neck of the container, the first unscrewing of the capsule 1 causes the bridges 16 to rupture, therefore at least partial detachment of the ring 15, which clearly indicates visible and irreversible that the container has undergone a first opening or attempted opening.

La capsule 101 suivant le mode de réalisation illustré par la figure 2 se compose également d'une coque extérieure 102 et d'une coque intérieure 103.The capsule 101 according to the embodiment illustrated in FIG. 2 also consists of an outer shell 102 and an inner shell 103.

La coque extérieure 102 comporte, de façon analogue à la coque extérieure 2 de la figure 1, une paroi latérale 104 avec un moletage extérieur 105 et un moletage intérieur 106, ainsi qu'un disque 107 à effet de barrière aux gaz sur la face intérieure de son fond 108.The external shell 102 comprises, in a similar manner to the external shell 2 of FIG. 1, a side wall 104 with an external knurling 105 and an internal knurling 106, as well as a disc 107 with gas barrier effect on the internal face from its bottom 108.

La coque intérieure 103 diffère de la coque intérieure 3 de la capsule 1 suivant la figure 1 uniquement par la présence d'une jupe d'étanchéité 110 faisant saillie sur le fond 109 de la coque 103 pour coopérer avec la face intérieure du goulot 111 d'un récipient. A part cela, on retrouve sur la coque intérieure 103 une paroi latérale 112 munie d'un moletage extérieure 113 et d'un filet femelle 114 coopérant avec le filet mâle 119 prévu sur le col du récipient. A son extrémité inférieure, la paroi latérale 112 de la coque intérieure 103 porte une bague d'inviolabilité 115 qui est ici représentée dans la position dans laquelle ses pattes 117 coopèrent avec le bourrelet 118 du col du récipient à boucher.The interior shell 103 differs from the interior shell 3 of the capsule 1 according to FIG. 1 only by the presence of a sealing skirt 110 projecting from the bottom 109 of the shell 103 to cooperate with the interior face of the neck 111 d 'a container. Apart from that, there is on the inner shell 103 a side wall 112 provided with an external knurling 113 and a female thread 114 cooperating with the male thread 119 provided on the neck of the container. At its lower end, the side wall 112 of the inner shell 103 carries a tamper-evident ring 115 which is here shown in the position in which its tabs 117 cooperate with the bead 118 of the neck of the container to be capped.

Dans les deux modes de réalisation représentés, sur les figures 1 et 2, le disque 7, 107 à effet de barrière intercalé entre les fonds B, 9 et 108, 109 des deux coques 102 et 103 peut être fixé par exemple par soudage aux ultra-sons à l'une et/ou à l'autre des deux coques 2, 3 et 102, 103. Il est également possible de surmouler le disque 7, 107 par la matière de la coque extérieure 2, 102, lors du moulage par injection de cette dernière. Pour permettre l'établissement d'une liaison par fusion du disque 7, 107 avec la coque extérieure 2, 102, il est nécessaire de prévoir sur ce disque 7, 107 dont l'effet barrière peut être de préférence obtenu par une couche métallique, une couche d'une matière plastique se prêtant à une liaison par fusion avec la matière de ladite coque. Il en est de même lorsque le disque 7, 107 doit être relié à la coque intérieure 3, 103.In the two embodiments shown, in FIGS. 1 and 2, the barrier effect disc 7, 107 interposed between the bottoms B, 9 and 108, 109 of the two shells 102 and 103 can be fixed, for example by ultra welding -sons to one and / or the other of the two shells 2, 3 and 102, 103. It is also possible to overmold the disc 7, 107 by the material of the outer shell 2, 102, during molding by injection of the latter. To allow the establishment of a connection by fusion of the disc 7, 107 with the outer shell 2, 102, it is necessary to provide on this disc 7, 107 whose barrier effect can preferably be obtained by a metal layer, a layer of a plastic material suitable for a fusion bond with the material of said shell. It is the same when the disc 7, 107 must be connected to the inner shell 3, 103.

La capsule 201 de la figure 3 comprend une coque extérieure 202 et une coque intérieure 203 qui, emboîtées l'une dans l'autre, sont solidaires l'une de l'autre axialement par une gorge circonférentielle 206 prévue intérieurement dans la paroi latérale 204 de la coque extérieure 202, pourvue extérieurement d'un moletage 205, et par un bourrelet 213 prévu extérieurement sur la paroi latérale 212 de la coque intérieure 203, le bourrelet 213 étant encliqueté dans la gorge 206 en fin d'emboîtement des deux coques l'une dans l'autre. Les deux coques 202 et 203 sont rendues solidaires l'une de l'autre dans le sens circonférentiel par des dents 21B prévues sur la gorge 206 et sur le bourrelet 213.The capsule 201 of FIG. 3 comprises an outer shell 202 and an inner shell 203 which, fitted one inside the other, are secured to one another axially by a circumferential groove 206 provided internally in the side wall 204 of the outer shell 202, externally provided with a knurling 205, and by a bead 213 provided externally on the side wall 212 of the inner shell 203, the bead 213 being snapped into the groove 206 at the end of fitting of the two shells l 'one in the other. The two shells 202 and 203 are made integral with one another in the circumferential direction by teeth 21B provided on the groove 206 and on the bead 213.

De plus, dans le mode de réalisation de la figure 3, les moyens d'étanchéité 210 de la coque intérieure 203 qui comporte un filetage femelle 214 sur sa paroi latérale 212 prolongée par une bague d'inviolabilité 215 comprennent ici une jupe 211 à l'extrémité inférieure de laquelle se raccorde le fond 209 en forme de plateau plan. Le disque 207 relié à la face intérieure du fond 208 de la coque extérieure 202 se trouve ainsi à distance du fond 209 de la coque intérieure.In addition, in the embodiment of Figure 3, the sealing means 210 of the inner shell 203 which has a female thread 214 on its side wall 212 extended by a tamper-evident ring 215 here comprise a skirt 211 to l 'lower end which connects the bottom 209 in the form of a flat plate. The disc 207 connected to the inner face of the bottom 208 of the outer shell 202 is thus spaced from the bottom 209 of the inner shell.

Il va de soi que les modes de réalisation représentés et décrits n'ont été donnés qu'à titre d'exemples illustratifs et non limitatifs et que de nombreuses modifications et variantes sont possibles dans le cadre de l'invention.It goes without saying that the embodiments shown and described have been given only by way of illustrative and nonlimiting examples and that numerous modifications and variants are possible within the scope of the invention.

Ainsi, des moyens d'étanchéité autres que la dépression annulaire 10 selon la figure 1, la jupe 110 selon la figure 2 ou la jupe à plateau 210 selon la figure 3 peuvent être prévus sur la coque intérieure 3, 103, 203 pour assurer l'étanchéité avec le goulot du récipient à boucher.Thus, sealing means other than the annular depression 10 according to FIG. 1, the skirt 110 according to FIG. 2 or the plate skirt 210 according to FIG. 3 can be provided on the inner shell 3, 103, 203 to seal the neck of the container to be capped.

Il convient par ailleurs de noter que la fabrication de la coque extérieure 2, 102, 202 est extrêmement simple et peut être réalisée à très haute cadence, en.raison de l'absence de filet intérieur. Or, c'est précisément en raison du filet femelle que le démoulage des capsules monopièces en matière plastique relativement rigide entraîne une forte réduction de la cadence de fabrication.It should also be noted that the manufacture of the outer shell 2, 102, 202 is extremely simple and can be carried out at very high speed, due to the absence of an internal thread. However, it is precisely because of the female thread that the demoulding of the relatively rigid one-piece plastic capsules leads to a significant reduction in the production rate.

De plus, sur la capsule conforme à l'invention, les deux coques peuvent être réalisées en des matières de couleurs différentes, ce qui non seulement donne un aspect plaisant à la capsule (bague d'inviolabilité d'une couleur différente de la partie restante visible, à savoir la coque extérieure), mais encore rend plus apparente toute tentative d'ouverture du récipient.In addition, on the capsule according to the invention, the two shells can be made of materials of different colors, which not only gives a pleasant appearance to the capsule (tamper-evident ring of a color different from the remaining part visible, namely the outer shell), but still makes any attempt to open the container more apparent.

Enfin, si le disque 7, 107, 207 est défini comme étant en un matériau à effet de barrage aux gaz, cet effet de barrage s'applique également aux vapeurs, aux arômes, aux odeurs et autres substances volatiles.Finally, if the disc 7, 107, 207 is defined as being of a material with a gas barrier effect, this barrier effect also applies to vapors, aromas, odors and other volatile substances.

Claims (9)

1°) Capsule de bouchage à vis pour récipient, composée de deux coques (2, 3; 102, 103; 202, 203) en forme de godet rendues solidaires par emboîtement l'une dans l'autre, la coque intérieure (3, 103, 203) étant constituée d'une matière plastique souple et comportant sur sa paroi latérale un filet femelle (14, 114, 214) susceptible de coopérer avec un filet mâle (119)) du col du récipient, et sur son fond (9, 109, 209) des moyens d'étanchéité (1O, 110, 210) susceptibles de coopérer avec le goulot (111) du récipient, et la coque extérieure (2, 102, 202) étant constituée d'une matière plastique dure, caractérisée par le fait qu'un disque (7, 107, 207) en un matériau à effet de barrière aux gaz est intercalé entre le fond (8, 108, 208) de la coque extérieure (2, 102, 202) et le fond (9, 109, 209) de la coque intérieure (3, 103, 203). 1) screw cap for container, composed of two shells (2, 3; 102, 103; 202, 203) in the form of a cup made integral by fitting one inside the other, the inner shell (3, 103, 203) consisting of a flexible plastic material and comprising on its side wall a female thread (14, 114, 214) capable of cooperating with a male thread (119)) of the neck of the container, and on its bottom (9 , 109, 209) sealing means (10, 110, 210) capable of cooperating with the neck (111) of the container, and the outer shell (2, 102, 202) being made of a hard plastic material, characterized by the fact that a disc (7, 107, 207) made of a material with a gas barrier effect is interposed between the bottom (8, 108, 208) of the outer shell (2, 102, 202) and the bottom ( 9, 109, 209) of the inner shell (3, 103, 203). 2°) Capsule suivant la revendication 1, caractérisée par le fait que ledit disque (7, 107, 207) est fixé au fond (8, 108, 208) de la coque extérieure (2, 102, 202) et/ou au fond (9, 109, 209) de la coque intérieure (3, 103, 203). 2 °) capsule according to claim 1, characterized in that said disc (7, 107, 207) is fixed to the bottom (8, 108, 208) of the outer shell (2, 102, 202) and / or to the bottom (9, 109, 209) of the inner shell (3, 103, 203). 3°) Capsule suivant la revendication 2, caractérisée par le fait que ledit disque (7, 107, 207) est fixé par soudage, par exemple aux ultra-sons, à la coque extérieure (2, 102, 202) et/ou à la coque intérieure (3, 103, 203). 3) capsule according to claim 2, characterized in that said disc (7, 107, 207) is fixed by welding, for example with ultrasound, to the outer shell (2, 102, 202) and / or to the inner shell (3, 103, 203). 4°) Capsule suivant la revendication 1, caractérisée par le fait que ledit disque (7, 107, 207) est surmoulé par la matière plastique de la coque extérieure (2, 102, 202 ou de la coque inbtérieure (3, 103, 203). 4 °) capsule according to claim 1, characterized in that said disc (7, 107, 207) is molded by the plastic of the outer shell (2, 102, 202 or the inner shell (3, 103, 203 ). 5°) Capsule suivant l'une quelconque des revendications 1 à 4, caractérisée par le fait que ledit disque (7, 107, 207) est formé d'une feuille de complexe comprenant, du côté de la coque extérieure, une matière se prètant à une liaison par fusion ou par soudage avec la matière de la coque extérieure. 5 °) capsule according to any one of claims 1 to 4, characterized in that said disc (7, 107, 207) is formed of a sheet of complex comprising, on the side of the outer shell, a material which is suitable for a fusion or welding connection with the material of the outer shell. 6°) Capsule suivant l'une quelconque des revendications 1 à 5, caractérisée par le fait que ledit disque (7, 107, 207) est formé d'une feuille de complexe comprenant, du côté de la coque intérieure (3, 103, 203), une matière se prêtant à une liaison par fusion ou par soudage avec la matière de la coque intérieure. 6 °) capsule according to any one of claims 1 to 5, characterized in that said disc (7, 107, 207) is formed of a sheet of complex comprising, on the side of the inner shell (3, 103, 203), a material suitable for a fusion or welding connection with the material of the inner shell. 7°) Capsule suivant l'une quelconque des revendications précédentes, caractérisée par le fait que les deux coques (2, 3; 102, 103; 202, 203)) sont constituées par des matières de couleurs différentes et qu'une bague d'inviolabilité (15, 115, 215) est réalisée d'une seule pièce avec la coque intérieure (3, 103, 203) de telle manière que cette bague dépasse de la coque extérieure (2, 102, 202) lorsque les deux coques sont emboîtées l'une dans l'autre. 7 °) capsule according to any one of the preceding claims, characterized in that the two shells (2, 3; 102, 103; 202, 203)) are made of materials of different colors and a ring of inviolability (15, 115, 215) is made in one piece with the inner shell (3, 103, 203) so that this ring protrudes from the outer shell (2, 102, 202) when the two shells are fitted one inside the other. 8. Capsule suivant l'une quelconque des revendications précédentes, caractérisée par le fait que les deux coques (202, 203) sont rendues solidaires axialement par une gorge circonférentielle (206) et par un bourrelet annulaire (213) coopérant par encliquetage en fin d'emboîtement des deux coques l'une dans l'autre. 8. Capsule according to any one of the preceding claims, characterized in that the two shells (202, 203) are made axially integral by a circumferential groove (206) and by an annular bead (213) cooperating by snap-fitting at the end of 'fitting of the two shells into each other. 9°) Capsule suivant la revendication 8, caractérisée par le fait que les deux coques (202, 203) sont rendues solidaires dans le sens circonférentiel par des dents (218) prévues sur ladite gorge (206) et sur ledit bourrelet (213). 9 °) capsule according to claim 8, characterized in that the two shells (202, 203) are made integral in the circumferential direction by teeth (218) provided on said groove (206) and on said bead (213).
EP92401353A 1991-05-21 1992-05-19 Screw cap with improved impermeability to gases Expired - Lifetime EP0515260B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT92401353T ATE100775T1 (en) 1991-05-21 1992-05-19 LOCKING SCREW CAP WITH IMPROVED GAS TIGHTNESS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9106113 1991-05-21
FR9106113A FR2676715A1 (en) 1991-05-21 1991-05-21 SCREW CAPSULE WITH IMPROVED GAS IMPERMEABILITY SCREW.

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EP0515260A1 true EP0515260A1 (en) 1992-11-25
EP0515260B1 EP0515260B1 (en) 1994-01-26

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EP (1) EP0515260B1 (en)
JP (1) JP2576052Y2 (en)
KR (2) KR947000002U (en)
AT (1) ATE100775T1 (en)
AU (1) AU672173B2 (en)
CA (1) CA2109612A1 (en)
DE (2) DE69200043T4 (en)
DK (1) DK0515260T3 (en)
ES (1) ES2048607T3 (en)
FR (1) FR2676715A1 (en)
NO (1) NO303932B1 (en)
WO (1) WO1992020589A1 (en)
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US9586730B2 (en) 2014-06-06 2017-03-07 Fisher Scientific Company, L.L.C. Tamper-evident closure assembly including outer shell, and related systems and methods
US10035627B2 (en) 2014-06-06 2018-07-31 Fisher Scientific Company, L.L.C. Tamper-evident closure assembly including outer shell, and related systems and methods
DE102017113032A1 (en) * 2017-06-13 2018-12-13 Bericap Holding Gmbh Closure with outer cap

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DK0515260T3 (en) 1994-03-21
US5695083A (en) 1997-12-09
WO1992020589A1 (en) 1992-11-26
AU672173B2 (en) 1996-09-26
CA2109612A1 (en) 1992-11-26
AU1883392A (en) 1992-12-30
EP0515260B1 (en) 1994-01-26
DE69200043D1 (en) 1994-03-10
NO934184L (en) 1993-11-19
KR970006410Y1 (en) 1997-06-24
NO934184D0 (en) 1993-11-19
FR2676715A1 (en) 1992-11-27
ES2048607T3 (en) 1994-03-16
JPH06500010U (en) 1994-09-08
KR947000002U (en) 1994-05-27
NO303932B1 (en) 1998-09-28
FR2676715B1 (en) 1994-12-30
DE69200043T4 (en) 1994-12-01
ZA923704B (en) 1992-12-30
JP2576052Y2 (en) 1998-07-09
ATE100775T1 (en) 1994-02-15
DE69200043T2 (en) 1994-05-05

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