EP0020250B1 - Package, container with a large opening, adapted lid and method of producing such a lid - Google Patents

Package, container with a large opening, adapted lid and method of producing such a lid Download PDF

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Publication number
EP0020250B1
EP0020250B1 EP80400721A EP80400721A EP0020250B1 EP 0020250 B1 EP0020250 B1 EP 0020250B1 EP 80400721 A EP80400721 A EP 80400721A EP 80400721 A EP80400721 A EP 80400721A EP 0020250 B1 EP0020250 B1 EP 0020250B1
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EP
European Patent Office
Prior art keywords
joint
edge
rim
ring
flange
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP80400721A
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German (de)
French (fr)
Other versions
EP0020250A1 (en
Inventor
Christiane Delattre
Nicole née Friedmann Tate
Gisèle Baudouin
Claude Dhuisme
Pierre Godard
Henri Laroche
Louis Mermand
Géry Misson
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Verallia France SA
Original Assignee
Saint Gobain Emballage SA
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Filing date
Publication date
Application filed by Saint Gobain Emballage SA filed Critical Saint Gobain Emballage SA
Priority to AT80400721T priority Critical patent/ATE8983T1/en
Publication of EP0020250A1 publication Critical patent/EP0020250A1/en
Application granted granted Critical
Publication of EP0020250B1 publication Critical patent/EP0020250B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D51/00—Closures not otherwise provided for
    • B65D51/14—Rigid discs or spherical members adapted to be held in sealing engagement with mouth of container, e.g. closure plates for preserving jars
    • B65D51/145—Rigid discs or spherical members adapted to be held in sealing engagement with mouth of container, e.g. closure plates for preserving jars by means of an additional element connected directly to the container

Definitions

  • the invention relates to a cover for vacuum sealing of large-opening containers, essentially made of glass, a method of manufacturing this cover and improvements made to said containers in order to make them suitable for receiving it.
  • the range of the container was bordered by a peripheral rod placed outside and of a height less than that intended for it (US-A-2,629,509), or even by two similar rods, l 'one outside, the other inside, associated if necessary with an internal ribbing intended to facilitate the cooling of the ring during forming to save its flatness (DE-C-646 921).
  • the existence of the rim makes it possible to develop the seal by molding a mass of plastic material put in place by centrifugal casting in the peripheral concave zone formed by it.
  • the object of the invention is to propose an even more economical route and aims to replace the capsules in question with a simple cover, which can, like the lids of the prior art, simply rest on the opening of the container to become rigidly secured. of it, without screwing or crimping.
  • This cover will be flexible enough to be able to support a very thin joint; it will then be thin enough so that its non-projecting edge can be protected by part of the ring of the container; its manufacture will be simplified and will require a lesser amount of metal than the usual devices.
  • the cover (normally circular in shape) has at its periphery a substantially planar annular part, to one face of which adheres a seal molded in thermoplastic material, and the edge of which comprises a flange folded over a double thickness in the direction of said joint so that the edge of this flange is embedded in the thickness of the latter, leaving it protruding on the underside.
  • the annular part is connected by a frustoconical shoulder to the flat central portion of the cover, so as to allow, without excessive increase in rigidity, as will be explained below, the stacking of containers equipped with such lids, but also, before capping, that of the lids on each other, finally on precise centering during installation.
  • the annular part of the cover is intended to be applied, by means of the seal with which it is fitted, against a corresponding portion, preferably conical, of the edge of the ring of the containers and very especially of glass containers. .
  • On this edge will also be provided a rim or external protective rod, the relief of which will be sufficient, thanks to the small, total thickness of the cover, to hide the periphery of the latter and prevent that, accidentally displaced from its seat, it may lose its seal.
  • the portion of the edge of the ring adjacent to the opening will include at least one sealing ring on which the seal of the cover will bear.
  • This sealing ring must be sufficiently narrow and naturally have a relief less than the thickness of the seal, therefore a fortiori than the outer edge of the ring, while the edge of the cover is preferably raised slightly, at a similar angle. from that formed by the top of the ring, to allow the collar to avoid the external protective ring while remaining protected by it with sufficient play.
  • the containers whose ring has the arrangements which have just been stated are within the scope of the present invention.
  • the container is closed in a known manner by injecting steam into the opening of the container and by placing the lid on the edge of the ring while hot.
  • atmospheric pressure hermetically applies the seal against the ring, without any manual intervention.
  • the seal under the effect of heat, deforms to conform to the shape of the ring while the sealing ring penetrates there, the cover thus disappearing in the housing formed by the outer edge of the ring; the latter effectively protects the cover against any involuntary stress and a seal of a few tenths of a millimeter is sufficient to obtain an effective closure.
  • closure device according to the invention due to the ease of deformation left to the cover by its quasi-flatness and the fact that the seal with which it is fitted deforms hot to conform to the shape of the part of the ring of the container on which it rests, admits for this ring manufacturing tolerances and mainly flatness much greater than what can accept existing closure devices. This constitutes an important advantage of the invention.
  • thermoplastic resin is poured onto the cover kept in rotation takes place inside the flange partially folded over the outer rim, said flange being then folded down completely and held in position using a matrix, which simultaneously forms said seal, until gelation of said resin.
  • the closure device according to the invention is in the form of a cover 1, which rests on the edge of the ring 2 of container 3 with large opening, without protruding outside of this ring.
  • the cover 1 consists of a metal disc of 0.2 mm sheet obtained simply by cutting and stamping. It has a flat central part 4, connected by a frustoconical shoulder 5 of about 3 mm to a flat annular surface 6 which bears on the upper edge of the ring 2, with the interposition of a seal 7 made of a thermoplastic material of a thickness of 0.3 to 0.4 mm, which adheres to the underside of the periphery.
  • This comprises an edge 8, having below it a flange 9 folded to double thickness, the edge 10 of which is in contact with the seal 7 which thus remains projecting at the bottom.
  • the edge of the ring 2 on which the cover 1 is supported by means of its seal 7 has an annular upper surface 11, flat in the present case, 2 to 3 mm wide, and bordered towards the outside of the container by a protective ring 12 forming a rim with a height of 0.6 mm and towards the opening of the container by a circular sealing ring 13 which here has a height of 0.2 mm.
  • the seal 7 is supported on the rod 13 and on the flat surface 11.
  • the establishment of the plugging device is carried out hot, so as to allow the joint 7 to deform by marrying the shape of the rod 13 and any roughness of the edge of the ring 2, after injection of steam in the container.
  • the condensation of this vapor inside the container causes a vacuum, under the effect of which the sealing device is applied hermetically around the opening of the container.
  • the rim 12 externally masks the edge 8 of the cover around its entire periphery with an average clearance of the order of 0.3 to 0.5 mm and effectively protects it against any effort liable to unintentionally take off the cover. of the container.
  • the edge 8 has been shown here slightly raised opposite the seal to be able to adapt more closely to the average profile of the ring. It is clear, however, that the peripheral part (6, 8) could be given slightly different shapes and for example place the flange 8 flat in the extension of the bearing surface 6 of the joint 7.
  • the fitting of the cover on the opening of the container can be carried out by any means known per se, for example using a magnetic head which, by means of the cone 5, makes it possible to obtain centering satisfactory from cover 1 on ring 2.
  • the cover 1 lends itself to stacking the containers on top of each other due to the frustoconical part 8. This part also facilitates handling and centering during operations for manufacturing the device and placing it on the container, without preventing very tight stacking which makes transportation very easy and economical.
  • the container can be stermed without any other precaution during this operation, except to operate in an autoclave whose pressure is higher than the saturated vapor pressure which corresponds to the sterilization temperature.
  • sterilization will be carried out at 120 ° C. under an autoclave pressure of the order of 2.5 to 3 atmospheres.
  • a protective belt 14 made of a retractable material, which matches the external shape of the ring 2 (FIG. 4). It is also possible to use for this purpose a molded cap 15, fitted on the ring 2. Such a lining has essentially a decorative role, but it also prevents fraudulent operations and also protects the edge of the container. Its use is, however, entirely optional, since the vacuum prevailing in the container is sufficient to rigidly hold in place the cover 1 on the ring 2, without risk of catching with external obstacles, due to the protective rim 12. It will be noted incidentally that, in this example, the surface 11 of the container is tapered towards the inside.
  • the closure device according to the invention adapts to rings having large manufacturing tolerances, which constitutes a considerable advantage compared to existing systems.
  • this device can be manufactured by simple and inexpensive means, using a technique known per se, the main phase of which is shown in FIG. 3 of the drawings.
  • thermoplastic resin 7a added with a crosslinking agent is poured on the cover 1 driven in rotation, the flange 9 disposed at the periphery is still folded only 120 ° relative to the edge 8.
  • the seal is then formed while folding the collar 9 using said matrix. This is kept in position, during the gelation of the thermoplastic material, then it is completed by pinching, to drown the edge 10 in the thickness of the joint which is thus projecting from the underside of the cover.
  • the invention therefore provides a simple, practical and inexpensive means for closing large-opening glass containers.

Abstract

1. Packaging comprising a receptable having an opening provided with a rim of which the edge comprises an upper annular bearing surface (11) which receives the sealing joint (7) moulded of thermoplastic material of a cover having at its periphery an annular part (6/8) having a surface to which the joint adheres, the border of the cover comprising a ring (9) folded to double thickness in the direction of said joint, so that its edge is embedded in the thickness of the latter, characterised in that the cover is a lid of which the peripheral annular part (6/8) is substantially planar, whereas the annular bearing surface (11) of the receptacle receiving the joint is provided, towards the internal periphery of the rim, with at least one sealing flange (13) in relief relative to the remainder of the rim surface and has at its exterior periphery a flange or raised edge (12) projecting therefrom, the border (8) being housed behind the exterior flange (12).

Description

L'invention concerne un opercule pour le bouchage sous vide de récipients de grande ouverture, essentiellement en verre, un procédé de fabrication de cet opercule et des perfectionnements apportés auxdits récipients en vue de les rendre aptes à le recevoir.The invention relates to a cover for vacuum sealing of large-opening containers, essentially made of glass, a method of manufacturing this cover and improvements made to said containers in order to make them suitable for receiving it.

Les dispositifs les plus anciens utilisaient de simples couvercles posés sur le bord de l'ouverture et maintenus, par la seule action du vide, sur des joints rapportés épais, ronds, plats, voire à deux lèvres formant ventouse. La grande épaisseur de ces joints, posés sur des bagues épaisses, permettait à ce type de fermeture de bien résister aux sollicitations mécaniques extérieures.The oldest devices used simple lids placed on the edge of the opening and maintained, by the only action of the vacuum, on thick, round, flat, added seals, even with two lips forming a suction cup. The great thickness of these seals, placed on thick rings, enabled this type of closure to withstand external mechanical stresses well.

Dans certains cas et pour centrer le joint, la portée du récipient était bordée par un jonc périphérique placé à l'extérieur et de hauteur inférieure à celle prévue pour lui (US-A-2 629 509), voire par deux joncs similaires, l'un extérieur, l'autre intérieur, associés le cas échéant à une nervuration intérieure destinée à faciliter le refroidissement de la bague lors du formage pour sauvegarder sa planéité (DE-C-646 921).In certain cases and to center the joint, the range of the container was bordered by a peripheral rod placed outside and of a height less than that intended for it (US-A-2,629,509), or even by two similar rods, l 'one outside, the other inside, associated if necessary with an internal ribbing intended to facilitate the cooling of the ring during forming to save its flatness (DE-C-646 921).

Désormais la plupart des récipients en verre d'assez grande dimension tels que bocaux ou pots de confiture sont fermés au moyen de capsules métalliques à joint incorporé munies d'un rebord qui coiffe les bords de l'ouverture, sur laquelle la capsule est immobilisée soit par vissage sur des filets, des crans ou sertissage sur des organes analogues de la bague du récipient, soit par simple emboîtement sur une partie de ce récipient dont le profil extérieur permet l'accrochage de l'organe de fixation.From now on most of the fairly large glass containers such as jars or jars of jam are closed by means of metal capsules with incorporated seal provided with a rim which covers the edges of the opening, on which the capsule is immobilized either by screwing on threads, notches or crimping on similar members of the ring of the container, or by simple fitting on a part of this container whose external profile allows the attachment of the fixing member.

L'existence du rebord permet d'élaborer le joint par moulage d'une masse de matière plastique mise en place par coulée centrifuge dans la zone concave périphérique formée par lui.The existence of the rim makes it possible to develop the seal by molding a mass of plastic material put in place by centrifugal casting in the peripheral concave zone formed by it.

Ce type de bouchage s'est substitué de façon très large aux solutions précédentes car, au moins aussi sûr, il est nettement plus léger et plus économique. Certes la fabrication de la capsule ou plus précisément l'élaboration de ses organes de fixation requiert une série d'opérations d'emboutissage qui en grèvent le prix de revient, mais la fixation est assez énergique pour permettre d'utiliser un joint peu important dont l'épaisseur dépasse rarement le millimètre; en outre il devient possible d'employer des récipients à parois minces dotées de rebords étroits ; enfin les opérations de bouchage sont relativement simples.This type of closure has replaced the previous solutions very widely because, at least as safe, it is significantly lighter and more economical. Admittedly the manufacture of the capsule or more precisely the development of its fixing members requires a series of stamping operations which increase the cost price, but the fixing is energetic enough to allow the use of an insignificant seal which the thickness rarely exceeds one millimeter; in addition it becomes possible to use containers with thin walls provided with narrow rims; finally, the capping operations are relatively simple.

Une solution intermédiaire avait également été proposée (GB-A 488 735) pour des récipients métalliques : elle utilise un couvercle à joint moulé dans une gorge munie d'un rebord plat, ce qui lui permet de s'emboîter sur le récipient tandis que le rebord en question déborde à la partie supérieure pour permettre une ouverture facile. Le maintien en place du couvercle est assuré par l'emboîtement, tandis que l'étanchéité résulte de l'effet du vide, l'élasticité du récipient compensant la relative rigidité du couvercle.An intermediate solution was also proposed (GB-A 488 735) for metal containers: it uses a seal cover molded in a groove provided with a flat rim, which allows it to fit onto the container while the rim in question overflows at the top to allow easy opening. Keeping the cover in place is ensured by the fitting, while the seal results from the effect of the vacuum, the elasticity of the container compensating for the relative rigidity of the cover.

L'invention a pour but de proposer une voie plus économique encore et vise à substituer aux capsules en question un simple opercule, qui puisse, comme les couvercles de l'art antérieur, simplement se poser sur l'ouverture du récipient pour devenir rigidement solidaire de celui-ci, sans vissage, ni sertissage. Cet opercule sera suffisamment flexible pour pouvoir supporter un joint très peu épais ; il sera alors assez mince pour que son bord, non débordant, puisse se trouver protégé par une partie de la bague du récipient ; sa fabrication sera simplifiée et exigera une quantité moindre de métal que les dispositifs usuels.The object of the invention is to propose an even more economical route and aims to replace the capsules in question with a simple cover, which can, like the lids of the prior art, simply rest on the opening of the container to become rigidly secured. of it, without screwing or crimping. This cover will be flexible enough to be able to support a very thin joint; it will then be thin enough so that its non-projecting edge can be protected by part of the ring of the container; its manufacture will be simplified and will require a lesser amount of metal than the usual devices.

Selon l'invention donc, l'opercule (de forme normalement circulaire) possède à sa périphérie une partie annulaire sensiblement plane, à une face de laquelle adhère un joint d'étanchéité moulé en matière thermoplastique, et dont le bord comporte une collerette repliée à une épaisseur double en direction dudit joint de façon telle que la tranche de cette collerette soit noyée dans l'épaisseur de celui-ci, le laissant en saillie sur la face inférieure.According to the invention therefore, the cover (normally circular in shape) has at its periphery a substantially planar annular part, to one face of which adheres a seal molded in thermoplastic material, and the edge of which comprises a flange folded over a double thickness in the direction of said joint so that the edge of this flange is embedded in the thickness of the latter, leaving it protruding on the underside.

Avantageusement, la partie annulaire est raccordée par un épaulement tronconique à la portion centrale plane de l'opercule, de manière à permettre, sans augmentation excessive de la rigidité, ainsi qu'il sera expliqué ci-après, l'empilement des récipients équipés de tels opercules, mais aussi, avant bouchage, celui des opercules les uns sur les autres, enfin sur centrage précis lors de la pose.Advantageously, the annular part is connected by a frustoconical shoulder to the flat central portion of the cover, so as to allow, without excessive increase in rigidity, as will be explained below, the stacking of containers equipped with such lids, but also, before capping, that of the lids on each other, finally on precise centering during installation.

La partie annulaire de l'opercule est destinée à venir s'appliquer, par l'intermédiaire du joint dont elle est équipée, contre une portion correspondante, de préférence conique, de la tranche de la bague des récipients et très spécialement de récipients en verre. Sur cette tranche sera également prévu un rebord ou jonc externe de protection, dont le relief sera suffisant, grâce à la faible, épaisseur totale de l'opercule, pour masquer le pourtour de celui-ci et éviter que, déplacé accidentellement de son siège, il puisse perdre son étanchéité. La partie de la tranche de la bague voisine de l'ouverture comportera au moins un jonc d'étanchéité sur lequel prendra appui le joint de l'opercule. Ce jonc d'étanchéité devra être suffisamment étroit et naturellement avoir un relief moindre que l'épaisseur du joint donc à fortiori que le rebord externe de la bague, tandis que le bord de l'opercule sera de préférence relevé légèrement, selon un angle voisin de celui formé par le haut de la bague, pour permettre à la collerette d'éviter le jonc externe de protection tout en restant protégée par lui avec un jeu suffisant. Les récipients dont la bague présente les dispositions qui viennent d'être énoncées entrent dans le cadre de la présente invention.The annular part of the cover is intended to be applied, by means of the seal with which it is fitted, against a corresponding portion, preferably conical, of the edge of the ring of the containers and very especially of glass containers. . On this edge will also be provided a rim or external protective rod, the relief of which will be sufficient, thanks to the small, total thickness of the cover, to hide the periphery of the latter and prevent that, accidentally displaced from its seat, it may lose its seal. The portion of the edge of the ring adjacent to the opening will include at least one sealing ring on which the seal of the cover will bear. This sealing ring must be sufficiently narrow and naturally have a relief less than the thickness of the seal, therefore a fortiori than the outer edge of the ring, while the edge of the cover is preferably raised slightly, at a similar angle. from that formed by the top of the ring, to allow the collar to avoid the external protective ring while remaining protected by it with sufficient play. The containers whose ring has the arrangements which have just been stated are within the scope of the present invention.

La fermeture du récipient s'effectue de façon connue en injectant de la vapeur dans l'ouverture du récipient et en posant à chaud l'opercule sur la tranche de la bague. Lorsque la vapeur se condense, la pression atmosphérique applique hermétiquement le joint contre la bague, sans aucune intervention manuelle. Le joint, sous l'effet de la chaleur, se déforme en épousant la forme de la bague tandis que le jonc d'étanchéité y pénètre, l'opercule s'effaçant ainsi dans le logement formé par le rebord extérieur de la bague ; ce dernier protège efficacement l'opercule contre toute sollicitation involontaire et un joint de quelques dixièmes de millimètres suffit à obtenir une fermeture efficace.The container is closed in a known manner by injecting steam into the opening of the container and by placing the lid on the edge of the ring while hot. When the vapor condenses, atmospheric pressure hermetically applies the seal against the ring, without any manual intervention. The seal, under the effect of heat, deforms to conform to the shape of the ring while the sealing ring penetrates there, the cover thus disappearing in the housing formed by the outer edge of the ring; the latter effectively protects the cover against any involuntary stress and a seal of a few tenths of a millimeter is sufficient to obtain an effective closure.

Il est naturellement possible de procéder à un surbouchage du récipient ainsi obturé à l'aide d'une coiffe ou d'un anneau, par exemple moulé et emboîté sur la bague du récipient ou encore constitué d'une matière rétractable.It is naturally possible to overcap the container thus closed using a cap or a ring, for example molded and fitted on the ring of the container or made of a shrinkable material.

On notera que le dispositif de bouchage conforme à l'invention, du fait de la facilité de déformation laissée à l'opercule par sa quasi- planéité et du fait que le joint dont il est équipé se déforme à chaud pour épouser la forme de la partie de la bague du récipient sur laquelle il prend appui, admet pour cette bague des tolérances de fabrication et principalement de planéité bien supérieures à ce que peuvent accepter les dispositifs existants d'obturation. Ceci constitue un avantage important de l'invention.It will be noted that the closure device according to the invention, due to the ease of deformation left to the cover by its quasi-flatness and the fact that the seal with which it is fitted deforms hot to conform to the shape of the part of the ring of the container on which it rests, admits for this ring manufacturing tolerances and mainly flatness much greater than what can accept existing closure devices. This constitutes an important advantage of the invention.

Un autre avantage de l'invention réside dans le faible coût de fabrication du dispositif. En effet, il est possible de fabriquer l'opercule à l'aide d'un procédé très simple, utilisant de façon particulière des moyens connus en soi. Selon ce procédé, la coulée de la résine thermoplastique sur l'opercule maintenu en rotation s'effectue à l'intérieur de la collerette partiellement rabattue sur le rebord externe, ladite collerette étant ensuite rabattue complètement et maintenue en position à l'aide d'une matrice, qui forme simultanément ledit joint, jusqu'à gélification de ladite résine. On peut alors éventuellement, si nécessaire, achever de pincer la collerette contre l'opercule pour noyer sa tranche dans l'épaisseur du joint.Another advantage of the invention lies in the low cost of manufacturing the device. Indeed, it is possible to manufacture the cover using a very simple process, using in particular means known per se. According to this method, the thermoplastic resin is poured onto the cover kept in rotation takes place inside the flange partially folded over the outer rim, said flange being then folded down completely and held in position using a matrix, which simultaneously forms said seal, until gelation of said resin. We can then possibly, if necessary, finish pinching the flange against the cover to drown its edge in the thickness of the joint.

L'invention sera décrite avec plus de détails ci-après, en référence aux dessins annexés, sur lesquels :

  • la figure 1 est une vue éclatée en élévation illustrant l'empilement de récipients équipés du dispositifs de bouchage conforme à l'invention ;
  • la figure 2 est une vue partielle éclatée, en coupe, de la bague d'un tel récipient et de la partie correspondante du dispositif de bouchage associé ;
  • la figure 3 est une vue partielle en coupe, illustrant une phase du procédé de fabrication du dispositif de bouchage ;
  • les figures 4 et 5 sont des vues partielles en coupe, illustrant deux possibilités de surbouchage des récipients conformes à l'invention.
The invention will be described in more detail below, with reference to the accompanying drawings, in which:
  • Figure 1 is an exploded view in elevation illustrating the stack of containers equipped with the closure devices according to the invention;
  • Figure 2 is a partial exploded view, in section, of the ring of such a container and the corresponding part of the associated closure device;
  • Figure 3 is a partial sectional view illustrating a phase of the manufacturing process of the closure device;
  • Figures 4 and 5 are partial sectional views illustrating two possibilities of overcapping the containers according to the invention.

Ainsi qu'il a été expliqué ci-dessus et comme on le voit sur les figures 1 et 2 des dessins, le dispositif de bouchage selon l'invention se présente sous la forme d'un opercule 1, qui repose sur la tranche de la bague 2 du récipient 3 à grande ouverture, sans déborder à l'extérieur de cette bague.As explained above and as seen in Figures 1 and 2 of the drawings, the closure device according to the invention is in the form of a cover 1, which rests on the edge of the ring 2 of container 3 with large opening, without protruding outside of this ring.

L'opercule 1 est constitué d'un disque métallique en tôle de 0,2 mm obtenu de façon simple par découpe et emboutissage. Il comporte une partie centrale plane 4, raccordée par un épaulement tronconique 5 d'environ 3 mm à une portée annulaire plane 6 qui prend appui sur la tranche supérieure de la bague 2, avec interposition d'un joint 7 en une matière thermoplastique d'une épaisseur de 0,3 à 0,4 mm, qui adhère à la face inférieure de la périphérie. Celle-ci comprend un bord 8, présentant au-dessous de lui une collerette 9 repliée à double épaisseur, dont la tranche 10 est au contact du joint 7 qui reste ainsi en saillie à la partie inférieure.The cover 1 consists of a metal disc of 0.2 mm sheet obtained simply by cutting and stamping. It has a flat central part 4, connected by a frustoconical shoulder 5 of about 3 mm to a flat annular surface 6 which bears on the upper edge of the ring 2, with the interposition of a seal 7 made of a thermoplastic material of a thickness of 0.3 to 0.4 mm, which adheres to the underside of the periphery. This comprises an edge 8, having below it a flange 9 folded to double thickness, the edge 10 of which is in contact with the seal 7 which thus remains projecting at the bottom.

La tranche de la bague 2 sur laquelle l'opercule 1 prend appui par l'intermédiaire de son joint 7 comporte une portée supérieure annulaire 11, plane dans le cas actuel, de 2 à 3 mm de large, et bordée vers l'extérieur du récipient par un jonc protecteur 12 formant un rebord d'une hauteur de 0,6 mm et vers l'ouverture du récipient par un jonc circulaire 13 d'étanchéité qui possède ici une hauteur de 0,2 mm. Le joint 7 prend appui sur le jonc 13 et sur la portée plane 11.The edge of the ring 2 on which the cover 1 is supported by means of its seal 7 has an annular upper surface 11, flat in the present case, 2 to 3 mm wide, and bordered towards the outside of the container by a protective ring 12 forming a rim with a height of 0.6 mm and towards the opening of the container by a circular sealing ring 13 which here has a height of 0.2 mm. The seal 7 is supported on the rod 13 and on the flat surface 11.

La mise en place du dispositif de bouchage s'effectue à chaud, de manière à permettre au joint 7 de se déformer en épousant la forme du jonc 13 et des aspérités éventuelles de la tranche de la bague 2, après injection de vapeur d'eau dans le récipient. La condensation de cette vapeur à l'intérieur du récipient provoque une dépression, sous l'effet de laquelle le dispositif de bouchage s'applique hermétiquement autour de l'ouverture du récipient.The establishment of the plugging device is carried out hot, so as to allow the joint 7 to deform by marrying the shape of the rod 13 and any roughness of the edge of the ring 2, after injection of steam in the container. The condensation of this vapor inside the container causes a vacuum, under the effect of which the sealing device is applied hermetically around the opening of the container.

On notera que le rebord 12 masque extérieurement le bord 8 de l'opercule sur tout son pourtour avec un jeu moyen de l'ordre de 0,3 à 0,5 mm et le protège efficacement contre tout effort risquant de décoller involontairement l'opercule du récipient. Le bord 8 a été représenté ici légèrement relevé à l'opposé du joint pour pouvoir s'adapter de plus près au profil moyen de la bague. Il est clair cependant que l'on pourrait donner à la partie périphérique (6, 8) des formes un peu différentes et placer par exemple le rebord 8 à plat dans le prolongement de la portée 6 du joint 7.It will be noted that the rim 12 externally masks the edge 8 of the cover around its entire periphery with an average clearance of the order of 0.3 to 0.5 mm and effectively protects it against any effort liable to unintentionally take off the cover. of the container. The edge 8 has been shown here slightly raised opposite the seal to be able to adapt more closely to the average profile of the ring. It is clear, however, that the peripheral part (6, 8) could be given slightly different shapes and for example place the flange 8 flat in the extension of the bearing surface 6 of the joint 7.

La pose de l'opercule sur l'ouverture du récipient peut s'effectuer par tout moyen connu en soi, par exemple à l'aide d'une tête magnétique qui, par l'intermédiaire du cône 5, permet d'obtenir un centrage satisfaisant de l'opercule 1 sur la bague 2.The fitting of the cover on the opening of the container can be carried out by any means known per se, for example using a magnetic head which, by means of the cone 5, makes it possible to obtain centering satisfactory from cover 1 on ring 2.

Comme on le voit sur la figure 1, une fois en place, l'opercule 1 se prête à l'empilement des récipients les uns sur les autres du fait de la partie tronconique 8. Cette partie facilite également la manutention et le centrage au cours des opérations de fabrication du dispositif et de pose de celui-ci sur le récipient, sans empêcher un empilage très serré qui rend le transport très facile et économique.As can be seen in FIG. 1, once in place, the cover 1 lends itself to stacking the containers on top of each other due to the frustoconical part 8. This part also facilitates handling and centering during operations for manufacturing the device and placing it on the container, without preventing very tight stacking which makes transportation very easy and economical.

Si nécessaire, après mise en place du dispositif de bouchage, on peut procéder a la stermsation du récipient, sans autre précaution, pendant cette opération, que d'opérer dans un autoclave dont la pression est supérieure à la pression de vapeur saturante qui correspond à la température de stérilisation. On effectuera par exemple la stérilisation à 120 °C sous une pression d'autoclave de l'ordre de 2,5 à 3 atmosphères.If necessary, after installation of the device The container can be stermed without any other precaution during this operation, except to operate in an autoclave whose pressure is higher than the saturated vapor pressure which corresponds to the sterilization temperature. For example, sterilization will be carried out at 120 ° C. under an autoclave pressure of the order of 2.5 to 3 atmospheres.

Pour ouvrir le récipient ainsi obturé, il suffira à l'utilisateur de percer l'opercule ou encore d'introduire une pièce métallique mince telle qu'une lame de couteau entre le jonc 12 et la périphérie de l'obturateur, soulevant ensuite celui-ci par effet de levier.To open the container thus closed, it will suffice for the user to pierce the cover or to introduce a thin metal piece such as a knife blade between the rod 12 and the periphery of the shutter, then lifting it this by leverage.

Il est bien entendu possible de placer sur l'emballage fermé, après passage à l'autoclave, une ceinture de protection 14, en une matière rétractable, qui épouse la forme externe de la bague 2 (figure 4). Il est aussi possible d'utiliser dans ce but une coiffe moulée 15, emboîtée sur la bague 2. Une telle garniture a essentiellement un rôle décoratif, mais elle s'oppose également à des manoeuvres frauduleuses et protège aussi le bord du récipient. Son emploi est cependant tout à fait facultatif, car la dépression régnant dans le récipient suffit à maintenir rigidement en place l'opercule 1 sur la bague 2, sans risque d'accrochage avec des obstacles extérieurs, en raison du rebord protecteur 12. On notera accessoirement que, dans cet exemple, la portée 11, du récipient est conique vers l'intérieur.It is of course possible to place on the closed packaging, after passage through the autoclave, a protective belt 14, made of a retractable material, which matches the external shape of the ring 2 (FIG. 4). It is also possible to use for this purpose a molded cap 15, fitted on the ring 2. Such a lining has essentially a decorative role, but it also prevents fraudulent operations and also protects the edge of the container. Its use is, however, entirely optional, since the vacuum prevailing in the container is sufficient to rigidly hold in place the cover 1 on the ring 2, without risk of catching with external obstacles, due to the protective rim 12. It will be noted incidentally that, in this example, the surface 11 of the container is tapered towards the inside.

Ainsi qu'il a été dit ci-dessus, le dispositif de bouchage conforme à l'invention s'adapte à des bagues présentant de grandes tolérances de fabrication, ce qui constitue un avantage considérable par rapport aux systèmes existants.As has been said above, the closure device according to the invention adapts to rings having large manufacturing tolerances, which constitutes a considerable advantage compared to existing systems.

En outre, ce dispositif peut être fabriqué par des moyens simples et peu coûteux, faisant appel à une technique connue en soi, dont la phase principale est représentée sur la figure 3 des dessins.In addition, this device can be manufactured by simple and inexpensive means, using a technique known per se, the main phase of which is shown in FIG. 3 of the drawings.

Une résine thermoplastique 7a additionnée d'un agent de réticulation est coulée sur l'opercule 1 entraîné en rotation, dont la collerette 9 disposée à la périphérie n'est encore repliée qu'à 120° par rapport au bord 8. A l'aide d'une matrice 16, on forme ensuite le joint tout en repliant la collerette 9 à l'aide de ladite matrice. On maintient celle-ci en position, pendant la gélification de la matière thermoplastique, puis on achève de la pincer, pour noyer la tranche 10 dans l'épaisseur du joint qui se trouve ainsi en saillie sur la face inférieure de l'opercule.A thermoplastic resin 7a added with a crosslinking agent is poured on the cover 1 driven in rotation, the flange 9 disposed at the periphery is still folded only 120 ° relative to the edge 8. Using of a matrix 16, the seal is then formed while folding the collar 9 using said matrix. This is kept in position, during the gelation of the thermoplastic material, then it is completed by pinching, to drown the edge 10 in the thickness of the joint which is thus projecting from the underside of the cover.

L'invention apporte donc un moyen simple, pratique et peu coûteux, pour l'obturation de récipients en verre de grande ouverture.The invention therefore provides a simple, practical and inexpensive means for closing large-opening glass containers.

Claims (8)

1. Packaging comprising a receptable having an opening provided with a rim of which the edge comprises an upper annular bearing surface (11) which receives the sealing joint (7) moulded of thermoplastic material of a cover having at its periphery an annular part (6/8) having a surface to which the joint adheres, the border of the cover comprising a ring (9) folded to double thickness in the direction of said joint, so that its edge is embedded in the thickness of the latter, characterised in that the cover is a lid of which the peripheral annular part (6/8) is substantially planar, whereas the annular bearing surface (11) of the receptacle receiving the joint is provided, towards the internal periphery of the rim, with at least one sealing flange (13) in relief relative to the remainder of the rim surface and has at its exterior periphery a flange or raised edge (12) projecting therefrom, the border (8) being housed behind the exterior flange (12).
2. Packaging according to claim 1, characterised in that said annular bearing surface (11) is trunconic towards the interior whereas the border (8) of the lid is raised by an angle close to that formed by the upper part of the rim.
3. Packaging according to one of claims 1 and 2, characterised in that the exterior flange (12) has a thickness substantially equal to the maximum thickness of the lid, the sealing flange (13) having a relief less than the thickness of the joint (7).
4. Receptable for use in packaging according to any one of claims 1 to 3, having an opening provided with a rim of which the edge comprises an upper annular bearing surface (11) protected at its exterior periphery by a flange or raised edge (12) extending therefrom, characterised in that said bearing surface (11) is also provided at its interior part with at least one peripheral sealing flange (13), in relief relative to the rest of the surface of the rim, by a height less than that of the exterior flange or raised edge (12).
5. Lid for use in packaging according to one of claims 1 to 3, having at its periphery an annular part having a surface to which adheres a sealing joint of moulded thermoplastics material, and a border (8) which comprises a ring (9) folded to double thickness in the direction of said joint so that its edge (10) is embedded in the thickness of the joint, characterised in that said annular part (6/8) is substantially planar, the joint (7) projecting thereform.
6. Lid according to claim 4, characterised in that its annular part is connected to the central planar portion (4) by a trunconic shoulder (5).
7. Method of making a lid according to claim 6, in which there is made by cutting and pressing a metal disc provided with a raised edge and there is moulded a joint of a mass of plastics material applied by centrifugal casting in the peripheral concave zone formed by the border, characterised in that said casting is carried out inside the ring (9) which is rebated on the external border only partially, this ring then being rebated completely during moulding by means of the die which simultaneously forms said joint.
8. Method according to claim 7, characterised in that said ring is pinched after the resin has solidified.
EP80400721A 1979-05-25 1980-05-23 Package, container with a large opening, adapted lid and method of producing such a lid Expired EP0020250B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80400721T ATE8983T1 (en) 1979-05-25 1980-05-23 PACKAGING, WIDE MOUTH CONTAINER, MATCHING LID, AND METHOD OF MAKING LID.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7913411 1979-05-25
FR7913411A FR2457229A1 (en) 1979-05-25 1979-05-25 DEVICE FOR THE CAPPING OF CONTAINERS WITH A LARGE OPENING, IMPROVEMENTS PROVIDED FOR SUCH CONTAINERS WITH A VIEW TO MAKING THEM CAPABLE OF RECEIVING SAID DEVICE AND METHOD

Publications (2)

Publication Number Publication Date
EP0020250A1 EP0020250A1 (en) 1980-12-10
EP0020250B1 true EP0020250B1 (en) 1984-08-15

Family

ID=9225878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80400721A Expired EP0020250B1 (en) 1979-05-25 1980-05-23 Package, container with a large opening, adapted lid and method of producing such a lid

Country Status (6)

Country Link
EP (1) EP0020250B1 (en)
AT (1) ATE8983T1 (en)
DE (1) DE3068946D1 (en)
ES (1) ES491789A0 (en)
FR (1) FR2457229A1 (en)
IE (1) IE49821B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3273772D1 (en) * 1981-12-15 1986-11-20 Weck J Gmbh & Co Closure device for preservation jars
US11613397B2 (en) 2019-09-12 2023-03-28 Owens-Brockway Glass Container Inc. Ring pull cap rim for glass containers

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2001748A (en) * 1931-03-23 1935-05-21 American Can Co Container closure
DE646921C (en) * 1935-09-01 1937-06-24 Von Poncet Glashuettenwerke Ak Preserving jar with a flat, unpolished sealing surface
GB488735A (en) * 1937-02-20 1938-07-13 Robert Barlow Improvements in or relating to boxes or cans
US2629509A (en) * 1950-10-10 1953-02-24 Glass Containers Inc Container adapted to be vacuum sealed
FR1090970A (en) * 1952-08-07 1955-04-06 Metal Box Co Ltd Method and apparatus for closing bottles and similar containers
US3307728A (en) * 1965-05-28 1967-03-07 Owens Illinois Inc Container and two-piece closure therefor
DE1532411C3 (en) * 1967-02-06 1975-12-18 Heinrich 2210 Itzehoe Eberhardt Cap-shaped lid for producing a vacuum seal on a beaker-shaped glass container

Also Published As

Publication number Publication date
FR2457229B1 (en) 1983-08-05
EP0020250A1 (en) 1980-12-10
ES8102531A1 (en) 1981-02-16
IE49821B1 (en) 1985-12-25
FR2457229A1 (en) 1980-12-19
ES491789A0 (en) 1981-02-16
IE801086L (en) 1980-11-25
ATE8983T1 (en) 1984-09-15
DE3068946D1 (en) 1984-09-20

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