EP2903905B1 - Composite stopper - Google Patents

Composite stopper Download PDF

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Publication number
EP2903905B1
EP2903905B1 EP13782797.8A EP13782797A EP2903905B1 EP 2903905 B1 EP2903905 B1 EP 2903905B1 EP 13782797 A EP13782797 A EP 13782797A EP 2903905 B1 EP2903905 B1 EP 2903905B1
Authority
EP
European Patent Office
Prior art keywords
cylindrical
edge
circular
cork
composite stopper
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.)
Active
Application number
EP13782797.8A
Other languages
German (de)
French (fr)
Other versions
EP2903905A1 (en
Inventor
Enrique Garcia-Cuenca
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.)
Au Liegeur - Ets J Pontneau Denis
Salins Du Midi Et Des Salines De L'Est Cie
Original Assignee
Au Liegeur - Ets J Pontneau Denis
Salins Du Midi Et Des Salines De L'Est Cie
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Au Liegeur - Ets J Pontneau Denis, Salins Du Midi Et Des Salines De L'Est Cie filed Critical Au Liegeur - Ets J Pontneau Denis
Publication of EP2903905A1 publication Critical patent/EP2903905A1/en
Application granted granted Critical
Publication of EP2903905B1 publication Critical patent/EP2903905B1/en
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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
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/02—Removable lids or covers
    • B65D43/0202—Removable lids or covers without integral tamper element
    • B65D43/0214—Removable lids or covers without integral tamper element secured only by friction or gravity
    • B65D43/022—Removable lids or covers without integral tamper element secured only by friction or gravity only on the inside, or a part turned to the inside, of the mouth of the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00064—Shape of the outer periphery
    • B65D2543/00074—Shape of the outer periphery curved
    • B65D2543/00092—Shape of the outer periphery curved circular
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00231—Overall construction of the lid made of several pieces
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00259—Materials used
    • B65D2543/00287—Wood
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00259—Materials used
    • B65D2543/00296—Plastic
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00259—Materials used
    • B65D2543/00314—Combination, e.g. laminates, several different materials
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/0049—Contact between the container and the lid on the inside or the outside of the container on the inside, or a part turned to the inside of the mouth of the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/00537—Contact between the container and the lid on the inside or the outside of the container on the outside, or a part turned to the outside of the mouth of the container
    • B65D2543/00546—NO contact
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00583—Means for limiting the axial insertion of the lid on the container

Definitions

  • the present invention relates to a composite stopper for capping large-necked containers.
  • One field of application envisaged is in particular that of cylindrical boxes receiving foodstuffs.
  • Such known containers have a composite stopper comprising a cylindrical cork member associated with an insulating member.
  • Cork corks are widely used, especially for corking bottles of wine.
  • the relative sealing of the closure is obtained by forcing the cork stopper through the neck of the bottles so as to keep it compressed.
  • the corking with a cork plug raises some difficulties, especially when these containers are made of a deformable material compared to glass.
  • the cap can not be put in compression through the neck of the container. It has a closing portion and a gripping portion for engaging the sealing portion within the neck, and it has been imagined to cover the sealing portion of a plastic insulating member in order to make it watertight.
  • the contents of the container is completely airtight with respect to the outside when the lid is installed through the opening of the container.
  • a composite plug having the features of the preamble of claim 1 is known from the document FR 2 866 634 A1 .
  • This insulation element conforms to the shapes of the closure part of the cap and is stuck to it.
  • the bonding operation consists in applying glue dots to the closure part of the cap and then coming to apply the insulation element against this sealing part and forcing them against each other. during the setting time of the glue.
  • This setting time is decisive in order to obtain a good bond between the cork and the insulating element and a perfect cohesion of the composite plug thus formed. Indeed, when the maintenance of the insulation element against the sealing portion is not long enough, during release, they tend to deviate from one another and their adjustment is imperfect since the glue does not play yet fully its role.
  • Other composite plugs comprising mechanical anchoring between two components are known documents EP 1 473 241 A1 and FR 954 611 .
  • a problem that arises and that aims to solve the present invention is to provide a composite plug at an advantageous cost, reducing its manufacturing time while maintaining its cohesion.
  • the present invention provides a composite stopper for the closure of containers having an opening delimited by a container edge
  • said composite stopper comprising, on the one hand, a cylindrical cork member having a shoulder defining a cylindrical portion adapted to come closing said opening and a bearing surface adapted to abut against said container edge, and secondly an insulation element having a bottom and a cylindrical rim defining an internal space, said cylindrical rim having a free edge, said insulation member capping said cylindrical portion of said cylindrical cork member, while said free edge is pressed against said bearing surface.
  • said cylindrical flange has a circular anchoring edge which extends inside said internal space; and said circular anchoring edge is anchored in said cylindrical portion of said cylindrical cork member when said insulation member caps said cylindrical portion.
  • a feature of the invention lies in the implementation of the circular anchoring edge of the insulating member which is anchored in the cylindrical portion of cork when, after the glue has been deposited on the latter, and that the cylindrical portion of cork was forcibly engaged inside the insulation element.
  • the circular anchoring edge is blocking their spacing, even if the glue is not yet effective. Therefore, it is by no means necessary to keep the cylindrical element of the element of insulation against each other after their association, which considerably reduces the manufacturing time, since it eliminates the setting time of the glue.
  • the cylindrical portion of the cylindrical cork member remains perfectly fitted into the insulating member as soon as they are applied and therefore the composite plug is cohesive.
  • said circular edge extends along said free edge.
  • said free edge extends along said free edge.
  • said circular edge has a triangular cross section.
  • the circular ridge is relatively prominent and it allows to achieve a good anchorage in the cork.
  • said cylindrical rim has a flange forming said free edge.
  • the flange comes flat against the bearing surface and then comes to preserve the cork, while the opposite circular face of the flange is adapted to come against the container edge.
  • said flange has a rim extending radially inside said inner space to form said circular ridge. In this way, the circular edge and the flange are completely integral with each other, which keeps the flange in abutment against the bearing surface of the shoulder, while the circular edge is anchored in the cylindrical portion of the cylindrical cork member.
  • said flange advantageously forms a conical surface having its top inside said internal space.
  • said bottom of said insulation element has a circular stiffening rib.
  • This circular rib extends axially opposite the cylindrical rim so as to stiffen the circular zone of junction between the bottom and the rim.
  • said cylindrical rim has axial grooves located outside said internal space, and extending from said bottom to said free edge to form vent.
  • axial grooves located outside said internal space, and extending from said bottom to said free edge to form vent.
  • said insulation element is molded in one piece in a polymer material. What makes it advantageous to produce and for example, it is molded in polyethylene.
  • the Figure 4 illustrates a composite plug 10 comprising a cylindrical cork member 12 of circular symmetry having a shoulder 14.
  • the cylindrical cork member 12 thus has a cylindrical portion 16 whose diameter is smaller than a gripping portion 18.
  • the composite plug 10 comprises an insulating member 20 capping the cylindrical portion 16.
  • the element insulation 20 is molded in one piece in a polymeric material. In this case, it is made of polyethylene which is both cheap and food grade. However, any other polymeric material having comparable qualities could be implemented.
  • the insulation element 20 is of symmetry circular axis of symmetry A. It has a flat bottom 19 and a cylindrical rim 22, which define an internal cylindrical space 21.
  • the cylindrical rim 22 ends with a flange 24 projecting outwardly from the internal cylindrical space 21.
  • the latter has a rim 26 which extends radially projecting inwardly of the internal cylindrical space 21 forming a circular ridge 28.
  • the flange 24 defines a free edge.
  • the cylindrical rim 22 has a diameter D1, for example between 50 and 100 mm and a height H close to 1/10 of the diameter D1, that is between 5 and 10 mm.
  • the thickness e of the flat bottom 19 it is for example, between 0.5 and 3 mm.
  • the flange 24 and the edge 26 define a conical top surface S, which vertex S is located in the internal cylindrical space 21, near the flat bottom 19, on the axis of symmetry A.
  • the conical surface is defined by a generatrix intersecting the vertex S and forming an angle of, for example, between 75 ° and 85 ° with the axis of symmetry A. According to one embodiment, the angle formed by the generator and the axis of symmetry A is close to 80 °.
  • the circular edge 28 is of triangular cross section and forms an acute angle, preferably less than 60 °, and for example less than 45 °. As will be explained below, to a certain extent, the more circular edge 28 is acute, the better will be its ability to penetrate the cork.
  • the insulation member 20 has, on its flat bottom 19, opposite the cylindrical rim 22 and the internal cylindrical space 21, a circular rib 30 for locally stiffening the insulation member 20
  • the insulation element 20 is deformable. However, to a certain extent, this deformation is necessary as will be explained below.
  • FIG. 2 illustrating the external surface of the insulating member 20. It includes the flange 24 and the cylindrical rim 22 that it extends as well as the flat bottom 19.
  • an axial groove 32 is formed axially on the surface of the rim cylindrical 22. This axial groove 32 opens, for one of its ends to the outer surface 34 of the flat bottom 19. The other of its ends is partially closed by a pad 36 and completely by the flange 24.
  • axial grooves 32 are provided in the periphery of the cylindrical rim 22, for example three other axial grooves.
  • the four axial grooves 32 are then offset from each other by an angle of 90 ° in the periphery of the cylindrical rim 22. They make it possible to form vents when the composite plug 10 is engaged in the opening of a container for the close it.
  • the only cylindrical element made of cork 12 is the shoulder 14, which defines the cylindrical part 16 and the gripping part 18 of the cylindrical cork element 12, a diameter greater than the cylindrical part 16.
  • L shoulder 14 also defines a circular bearing surface 38, against the gripping portion 18.
  • the cylindrical portion 16, on the one hand has a diameter D2 substantially equal to the diameter D1 of the cylindrical flange 22 of the element 20, and secondly a height h, between a free surface 40 and a base 42 located at the circular bearing surface 38. This height h is substantially less than the height H of the cylindrical rim 22.
  • the insulating element 20 is intended to cap the cylindrical portion 16 of the cylindrical element cork 12 and to be secured to form the composite plug 10. To do this, it comes first applying glue on the free surface 40 of the cylindrical portion 16, for example in the form of uniformly distributed drops. According to a particular embodiment, "hot-melt" adhesive dots, for example polyamide in the molten state, are applied. These points are for example six in number and regularly distributed on the periphery of the free surface 40. Then, before the glue hardens, the cylindrical portion 16 is capped with the insulating member 20. The diameter of the circular edge 28 is by definition less than the diameter D2 of the cylindrical portion 16.
  • the peripheral edge of the the free surface 40 of the cylindrical portion 16 first bears against the rim 26 of the collar 24, then forcing the engagement of the cylindrical portion 16 within the internal cylindrical space 21 of the 20, the circular stop 28 widens substantially while the cylindrical portion 16 compresses radially.
  • the widening of the circular edge 28 is possible thanks to the deformable polymer material, and the compression of the cylindrical part 16 is by the nature of the cork.
  • the flange 24 and its edge 26 pivot around the outer edge of the flange 24, and at the stroke, the circular edge 28 sinks into the base 42 of the cylindrical portion 16, at the level of the circular bearing surface 38. Also, the flange 24 and its edge 26 are in flat support against the circular bearing surface 38. And in addition, the points of glue s flatten and form a thin film between the flat bottom 19 and the target surface 40.
  • the composite plug is thus produced 10 as illustrated on the Figure 4 .
  • the insulating member 20 remains in position on the cylindrical portion 16 and the flange 24 flat against the bearing surface circular 38, thanks to the circular edge 28 anchored in the base 42. Indeed, thanks to this anchoring, the insulation member 20 is kept locked in translation on the cylindrical portion 16. Thus, it is not at all need to wait for the curing or drying of the adhesive to release the insulating element 20 the cylindrical element 12. Also, the production times of the composite plugs 10 is shortened, which reduces its unit production cost .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Description

La présente invention se rapporte à un bouchon composite pour le bouchage des récipients à col large.The present invention relates to a composite stopper for capping large-necked containers.

Un domaine d'application envisagé est notamment celui des boîtes cylindriques recevant des denrées alimentaires. De tels récipients connus présentent un bouchon composite comprenant un élément cylindrique en liège associé à un élément d'isolation.One field of application envisaged is in particular that of cylindrical boxes receiving foodstuffs. Such known containers have a composite stopper comprising a cylindrical cork member associated with an insulating member.

Les bouchons en liège sont largement utilisés, notamment pour le bouchage des bouteilles de vin. Toutefois, l'étanchéité relative du bouchage est obtenue en forçant le bouchon en liège, à travers le col des bouteilles de manière à le maintenir comprimé. S'agissant des récipients à plus large col, le bouchage au moyen d'un bouchon en liège soulève quelques difficultés, notamment lorsque ces récipients sont réalisés dans un matériau déformable comparé au verre.Cork corks are widely used, especially for corking bottles of wine. However, the relative sealing of the closure is obtained by forcing the cork stopper through the neck of the bottles so as to keep it compressed. In the case of containers with a wider neck, the corking with a cork plug raises some difficulties, especially when these containers are made of a deformable material compared to glass.

En effet, le bouchon ne peut être mis en compression à travers le col du récipient. Il présente une partie d'obturation et une partie de préhension permettant d'engager la partie d'obturation à l'intérieur du col, et il a été imaginé de recouvrir la partie d'obturation d'un élément d'isolation en matière plastique de manière à la rendre étanche. Ainsi, le contenu du récipient est-il totalement étanche vis-à-vis de l'extérieur lorsque le couvercle est installé à travers l'ouverture du récipient.Indeed, the cap can not be put in compression through the neck of the container. It has a closing portion and a gripping portion for engaging the sealing portion within the neck, and it has been imagined to cover the sealing portion of a plastic insulating member in order to make it watertight. Thus, the contents of the container is completely airtight with respect to the outside when the lid is installed through the opening of the container.

Un bouchon composite ayant les caractéristiques du préambule de la revendication 1 est connu du document FR 2 866 634 A1 .A composite plug having the features of the preamble of claim 1 is known from the document FR 2 866 634 A1 .

Cet élément d'isolation épouse les formes de la partie d'obturation du bouchon et y est collé. L'opération de collage consiste à appliquer des points de colle sur la partie d'obturation du bouchon et ensuite de venir appliquer l'élément d'isolation contre cette partie d'obturation et de les maintenir à force l'un contre l'autre durant le temps de prise de la colle. Ce temps de prise est déterminant pour obtenir une bonne liaison du liège et de l'élément d'isolation et une parfaite cohésion du bouchon composite ainsi formé. En effet, lorsque le maintien de l'élément d'isolation contre la partie d'obturation n'est pas suffisamment long, lors du relâchement, ils tendent à s'écarter l'un de l'autre et leur ajustement est imparfait puisque la colle ne joue pas encore pleinement son rôle. Des autres bouchons composites comprenant un ancrage mécanique entre deux composants sont connus des documents EP 1 473 241 A1 et FR 954 611 .This insulation element conforms to the shapes of the closure part of the cap and is stuck to it. The bonding operation consists in applying glue dots to the closure part of the cap and then coming to apply the insulation element against this sealing part and forcing them against each other. during the setting time of the glue. This setting time is decisive in order to obtain a good bond between the cork and the insulating element and a perfect cohesion of the composite plug thus formed. Indeed, when the maintenance of the insulation element against the sealing portion is not long enough, during release, they tend to deviate from one another and their adjustment is imperfect since the glue does not play yet fully its role. Other composite plugs comprising mechanical anchoring between two components are known documents EP 1 473 241 A1 and FR 954 611 .

Or, pour améliorer le coût de production d'un tel bouchon composite, il conviendrait de réduire son temps de fabrication.However, to improve the production cost of such a composite plug, it should reduce its manufacturing time.

Aussi, un problème qui se pose et que vise à résoudre la présente invention est de fournir un bouchon composite à un coût avantageux, en réduisant son temps de fabrication tout en conservant sa cohésion.Also, a problem that arises and that aims to solve the present invention is to provide a composite plug at an advantageous cost, reducing its manufacturing time while maintaining its cohesion.

Dans ce but, la présente invention propose un bouchon composite pour le bouchage des récipients présentant une ouverture délimitée par un bord de récipient, ledit bouchon composite comprenant, d'une part un élément cylindrique en liège présentant un épaulement définissant une partie cylindrique apte à venir obturer ladite ouverture et une surface d'appui apte à venir en appui contre ledit bord de récipient, et d'autre part un élément d'isolation présentant un fond et un rebord cylindrique définissant un espace interne, ledit rebord cylindrique présentant un bord libre, ledit élément d'isolation venant coiffer ladite partie cylindrique dudit élément cylindrique en liège, tandis que ledit bord libre vient s'appliquer contre ladite surface d'appui. Selon l'invention ledit rebord cylindrique présente une arête circulaire d'ancrage qui s'étend à l'intérieur dudit espace interne ; et ladite arête circulaire d'ancrage vient s'ancrer dans ladite partie cylindrique dudit élément cylindrique en liège lorsque ledit élément d'isolation vient coiffer ladite partie cylindrique.For this purpose, the present invention provides a composite stopper for the closure of containers having an opening delimited by a container edge, said composite stopper comprising, on the one hand, a cylindrical cork member having a shoulder defining a cylindrical portion adapted to come closing said opening and a bearing surface adapted to abut against said container edge, and secondly an insulation element having a bottom and a cylindrical rim defining an internal space, said cylindrical rim having a free edge, said insulation member capping said cylindrical portion of said cylindrical cork member, while said free edge is pressed against said bearing surface. According to the invention, said cylindrical flange has a circular anchoring edge which extends inside said internal space; and said circular anchoring edge is anchored in said cylindrical portion of said cylindrical cork member when said insulation member caps said cylindrical portion.

Ainsi, une caractéristique de l'invention réside dans la mise en oeuvre de l'arête circulaire d'ancrage de l'élément d'isolation qui vient s'ancrer dans la partie cylindrique en liège lorsque, après que la colle a été déposée sur cette dernière, et que la partie cylindrique en liège a été engagée à force à l'intérieur de l'élément d'isolation. De la sorte, lors du relâchement de l'élément cylindrique en liège et de l'élément d'isolation, l'arête circulaire d'ancrage vient bloquer leur écartement, quand bien même la prise de la colle n'est pas encore effective. Partant, il n'est nullement nécessaire de maintenir l'un contre l'autre l'élément d'isolation élément cylindrique après leur association, ce qui diminue considérablement le temps de fabrication, puisqu'on s'affranchit du temps de prise de la colle. Au surplus, la partie cylindrique de l'élément cylindrique en liège demeure parfaitement ajustée dans l'élément d'isolation dès leur application et par conséquent le bouchon composite est cohésif.Thus, a feature of the invention lies in the implementation of the circular anchoring edge of the insulating member which is anchored in the cylindrical portion of cork when, after the glue has been deposited on the latter, and that the cylindrical portion of cork was forcibly engaged inside the insulation element. In this way, during the release of the cylindrical cork member and the insulating member, the circular anchoring edge is blocking their spacing, even if the glue is not yet effective. Therefore, it is by no means necessary to keep the cylindrical element of the element of insulation against each other after their association, which considerably reduces the manufacturing time, since it eliminates the setting time of the glue. In addition, the cylindrical portion of the cylindrical cork member remains perfectly fitted into the insulating member as soon as they are applied and therefore the composite plug is cohesive.

En outre, selon une caractéristique de l'invention particulièrement avantageuse, ladite arête circulaire s'étend le long dudit bord libre. De la sorte, le rebord cylindrique et le fond de l'élément d'isolation sont retenus sur la partie cylindrique en liège au niveau du bord libre du rebord cylindrique. Partant, lorsque l'élément cylindrique en liège et l'élément d'isolation sont comprimés axialement l'un dans l'autre, le bord libre du rebord cylindrique vient s'ajuster en appui contre l'épaulement, tandis que la partie cylindrique en liège est comprimée axialement et que le rebord cylindrique est en tension axiale, et par conséquent, lors du relâchement le bord libre demeure en appui contre l'épaulement car le rebord cylindrique est ancré dans la partie cylindrique en liège au même niveau.In addition, according to a feature of the invention particularly advantageous, said circular edge extends along said free edge. In this way, the cylindrical rim and the bottom of the insulating element are retained on the cylindrical cork portion at the free edge of the cylindrical rim. As a result, when the cylindrical cork element and the insulation element are axially compressed one inside the other, the free edge of the cylindrical rim comes to fit against the shoulder while the cylindrical portion cork is compressed axially and that the cylindrical rim is in axial tension, and therefore, during release the free edge remains in abutment against the shoulder because the cylindrical rim is anchored in the cylindrical portion of cork at the same level.

Préférentiellement, ladite arête circulaire présente une section droite triangulaire. Aussi, l'arête circulaire est relativement saillante et elle permet de réaliser un bon ancrage dans le liège.Preferably, said circular edge has a triangular cross section. Also, the circular ridge is relatively prominent and it allows to achieve a good anchorage in the cork.

Selon une autre caractéristique de l'invention particulièrement avantageuse, ledit rebord cylindrique présente une collerette formant ledit bord libre. Ainsi, la collerette vient s'appliquer à plat contre la surface d'appui et vient alors y préserver le liège, tandis que la face circulaire opposée de la collerette est apte à venir s'appliquer contre le bord de récipient. De préférence, ladite collerette présente une bordure s'étendant radialement à l'intérieur dudit espace interne pour former ladite arête circulaire. De la sorte, l'arête circulaire et la collerette sont totalement solidaires l'une de l'autre, ce qui permet de maintenir la collerette en appui contre la surface d'appui de l'épaulement, tandis que l'arête circulaire est ancrée dans la partie cylindrique de l'élément cylindrique en liège.According to another particularly advantageous feature of the invention, said cylindrical rim has a flange forming said free edge. Thus, the flange comes flat against the bearing surface and then comes to preserve the cork, while the opposite circular face of the flange is adapted to come against the container edge. Preferably, said flange has a rim extending radially inside said inner space to form said circular ridge. In this way, the circular edge and the flange are completely integral with each other, which keeps the flange in abutment against the bearing surface of the shoulder, while the circular edge is anchored in the cylindrical portion of the cylindrical cork member.

En outre, ladite collerette forme de manière avantageuse, une surface conique présentant son sommet à l'intérieur dudit espace interne. Ainsi, lorsque l'élément d'isolation vient coiffer la partie cylindrique en liège et que les deux éléments sont comprimés l'un contre l'autre, le bord externe de la collerette vient d'abord s'appliquer contre l'extérieur de la surface d'appui de l'épaulement. Ensuite, au fur et à mesure de la compression des deux éléments, la collerette tend à pivoter à mesure que l'arête circulaire se rapproche et est entraînée axialement autour de la partie cylindrique en liège vers la surface d'appui de l'épaulement. De la sorte, lorsque les deux éléments sont relâchés, alors que le liège comprimé se détend, la collerette demeure appliquée en compression contre la surface d'appui de l'épaulement.In addition, said flange advantageously forms a conical surface having its top inside said internal space. Thus, when the insulation member caps the cork cylindrical portion and the two elements are compressed against each other, the outer edge of the collar first comes to bear against the outside of the bearing surface of the shoulder. Then, as the two elements are compressed, the flange tends to pivot as the circular edge approaches and is driven axially around the cylindrical cork portion. towards the bearing surface of the shoulder. In this way, when the two elements are released, while the compressed cork relaxes, the collar remains pressed against the bearing surface of the shoulder.

Selon un mode de réalisation de l'invention particulièrement avantageux, ledit fond dudit élément d'isolation présente une nervure circulaire de rigidification. Cette nervure circulaire s'étend axialement à l'opposé du rebord cylindrique de manière à rigidifier la zone circulaire de jonction entre le fond et le rebord.According to a particularly advantageous embodiment of the invention, said bottom of said insulation element has a circular stiffening rib. This circular rib extends axially opposite the cylindrical rim so as to stiffen the circular zone of junction between the bottom and the rim.

De plus, selon une variante de réalisation, ledit rebord cylindrique présente des rainures axiales situées à l'extérieur dudit espace interne, et s'étendant dudit fond jusqu'audit bord libre pour former évent. Ainsi qu'on l'expliquera plus en détail ci-après dans la description, grâce à ces rainures axiales, lorsque le bouchon composite et appliqué sur le récipient pour le refermer, une partie de l'air qu'il contient en est chassée. Grâce à cette caractéristique, l'oxydation de la denrée contenue à l'intérieur du récipient est grandement atténuée.In addition, according to an alternative embodiment, said cylindrical rim has axial grooves located outside said internal space, and extending from said bottom to said free edge to form vent. As will be explained in more detail below in the description, thanks to these axial grooves, when the composite plug and applied to the container to close it, a portion of the air it contains is driven away. Thanks to this characteristic, the oxidation of the foodstuff contained inside the container is greatly attenuated.

Préférentiellement, ledit élément d'isolation est moulé d'une seule pièce dans un matériau polymère. Ce qui le rend avantageux à produire et par exemple, il est moulé en polyéthylène.Preferably, said insulation element is molded in one piece in a polymer material. What makes it advantageous to produce and for example, it is molded in polyethylene.

D'autres particularités et avantages de l'invention ressortiront à la lecture de la description faite ci-après d'un mode de réalisation particulier de l'invention, donné à titre indicatif mais non limitatif, en référence aux dessins annexés sur lesquels :

  • la Figure 1 et une vue schématique en coupe axiale d'un élément du bouchon composite selon l'invention;
  • la Figure 2 et une vue schématique en élévation de côté de l'élément représenté sur la Figure 1 ;
  • la Figure 3 et une vue schématique en élévation de côté d'un autre élément du bouchon composite selon l'invention ; et,
  • la Figure 4 et une vue schématique en coupe axiale montrant les deux éléments représentés sur les Figures 1 et 3, associés.
Other features and advantages of the invention will emerge on reading the following description of a particular embodiment of the invention, given by way of indication but not limitation, with reference to the accompanying drawings in which:
  • the Figure 1 and a schematic view in axial section of an element of the composite plug according to the invention;
  • the Figure 2 and a schematic side elevational view of the element shown on the Figure 1 ;
  • the Figure 3 and a diagrammatic side elevational view of another element of the composite plug according to the invention; and,
  • the Figure 4 and a schematic view in axial section showing the two elements represented on the Figures 1 and 3 , associates.

La Figure 4 illustre un bouchon composite 10 comprenant un élément cylindrique en liège 12 de symétrie circulaire présentant un épaulement 14.The Figure 4 illustrates a composite plug 10 comprising a cylindrical cork member 12 of circular symmetry having a shoulder 14.

L'élément cylindrique en liège 12 présente ainsi une partie cylindrique 16 dont le diamètre est inférieur à une partie de préhension 18. En outre, le bouchon composite 10 comprend un élément d'isolation 20 coiffant la partie cylindrique 16. L'élément d'isolation 20 est moulé d'une seule pièce dans un matériau polymère. En l'espèce, il est réalisé en polyéthylène lequel est à la fois bon marché et de qualité alimentaire. Toutefois, tout autre matériau polymère présentant des qualités comparables pourrait être mis en oeuvre.The cylindrical cork member 12 thus has a cylindrical portion 16 whose diameter is smaller than a gripping portion 18. In addition, the composite plug 10 comprises an insulating member 20 capping the cylindrical portion 16. The element insulation 20 is molded in one piece in a polymeric material. In this case, it is made of polyethylene which is both cheap and food grade. However, any other polymeric material having comparable qualities could be implemented.

On se reportera maintenant sur la Figure 1 afin de décrire plus en détail l'élément d'isolation 20. Ce dernier est de symétrie circulaire d'axe de symétrie A. Il présente un fond plat 19 et un rebord cylindrique 22, lesquels définissent un espace cylindrique interne 21. Le rebord cylindrique 22 se termine par une collerette 24 en saillie vers l'extérieur de l'espace cylindrique interne 21. Cette dernière présente une bordure 26 qui s'étend radialement en saillie vers l'intérieur de l'espace cylindrique interne 21 en formant une arête circulaire 28. La collerette 24 définit un bord libre. Le rebord cylindrique 22 présente un diamètre D1, compris par exemple entre 50 et 100 mm et une hauteur H voisine de 1/10 du diamètre D1, soit, comprise entre 5 et 10 mm. Quant à l'épaisseur e du fond plat 19 elle est par exemple, comprise entre 0,5 et 3 mm.We will now refer to the Figure 1 to describe in more detail the insulation element 20. The latter is of symmetry circular axis of symmetry A. It has a flat bottom 19 and a cylindrical rim 22, which define an internal cylindrical space 21. The cylindrical rim 22 ends with a flange 24 projecting outwardly from the internal cylindrical space 21. The latter has a rim 26 which extends radially projecting inwardly of the internal cylindrical space 21 forming a circular ridge 28. The flange 24 defines a free edge. The cylindrical rim 22 has a diameter D1, for example between 50 and 100 mm and a height H close to 1/10 of the diameter D1, that is between 5 and 10 mm. As for the thickness e of the flat bottom 19 it is for example, between 0.5 and 3 mm.

On observera que la collerette 24 et la bordure 26 définissent une surface conique de sommet S, lequel sommet S est situé dans l'espace cylindrique interne 21, près du fond plat 19, sur l'axe de symétrie A. La surface conique est définie par une génératrice coupant le sommet S et formant un angle compris par exemple entre 75° et 85° avec l'axe de symétrie A. Selon un mode de mise en oeuvre, l'angle formé par la génératrice et l'axe de symétrie A est voisin de 80°.It will be observed that the flange 24 and the edge 26 define a conical top surface S, which vertex S is located in the internal cylindrical space 21, near the flat bottom 19, on the axis of symmetry A. The conical surface is defined by a generatrix intersecting the vertex S and forming an angle of, for example, between 75 ° and 85 ° with the axis of symmetry A. According to one embodiment, the angle formed by the generator and the axis of symmetry A is close to 80 °.

L'arête circulaire 28 est de section droite triangulaire et forme un angle aigu, de préférence inférieur à 60°, et par exemple inférieur à 45°. Ainsi qu'on l'expliquera ci-après, dans une certaine mesure, plus l'arête circulaire 28 est aigue, meilleures seront ses capacités à pénétrer dans le liège.The circular edge 28 is of triangular cross section and forms an acute angle, preferably less than 60 °, and for example less than 45 °. As will be explained below, to a certain extent, the more circular edge 28 is acute, the better will be its ability to penetrate the cork.

En outre, l'élément d'isolation 20 présente, sur son fond plat 19, à l'opposé du rebord cylindrique 22 et de l'espace cylindrique interne 21, une nervure circulaire 30 destinée à rigidifier localement l'élément d'isolation 20. En effet, compte-tenu du matériau utilisé et de son épaisseur, l'élément d'isolation 20 est déformable. Toutefois, dans une certaine mesure, cette déformation est nécessaire comme on l'expliquera ci-après.In addition, the insulation member 20 has, on its flat bottom 19, opposite the cylindrical rim 22 and the internal cylindrical space 21, a circular rib 30 for locally stiffening the insulation member 20 In view of the material used and its thickness, the insulation element 20 is deformable. However, to a certain extent, this deformation is necessary as will be explained below.

On se reportera sur la Figure 2 illustrant la surface externe de l'élément d'isolation 20. On y retrouve la collerette 24 et le rebord cylindrique 22 qu'elle prolonge ainsi que le fond plat 19. En outre, une rainure axiale 32 est ménagée axialement à la surface du rebord cylindrique 22. Cette rainure axiale 32 débouche, pour l'une de ses extrémités à la surface externe 34 du fond plat 19. L'autre de ses extrémités est partiellement obturée par un coussinet 36 et totalement par la collerette 24.We will refer to the Figure 2 illustrating the external surface of the insulating member 20. It includes the flange 24 and the cylindrical rim 22 that it extends as well as the flat bottom 19. In addition, an axial groove 32 is formed axially on the surface of the rim cylindrical 22. This axial groove 32 opens, for one of its ends to the outer surface 34 of the flat bottom 19. The other of its ends is partially closed by a pad 36 and completely by the flange 24.

D'autres rainures axiales 32 sont prévues dans le pourtour du rebord cylindrique 22, par exemple trois autres rainures axiales. Les quatre rainures axiales 32 sont alors décalées les unes des autres d'un angle de 90° dans le pourtour du rebord cylindrique 22. Elles permettent de former des évents lorsque le bouchon composite 10 est engagé dans l'ouverture d'un récipient pour le refermer.Other axial grooves 32 are provided in the periphery of the cylindrical rim 22, for example three other axial grooves. The four axial grooves 32 are then offset from each other by an angle of 90 ° in the periphery of the cylindrical rim 22. They make it possible to form vents when the composite plug 10 is engaged in the opening of a container for the close it.

Sur la Figure 3, est représenté le seul élément cylindrique en liège 12. On y retrouve l'épaulement 14, lequel définit la partie cylindrique 16 et la partie de préhension 18 de l'élément cylindrique en liège 12, un diamètre supérieur à la partie cylindrique 16. L'épaulement 14 définit également une surface d'appui circulaire 38, contre la partie de préhension 18. Par ailleurs, la partie cylindrique 16, présente d'une part, un diamètre D2 sensiblement égal au diamètre D1 du rebord cylindrique 22 de l'élément d'isolation 20, et d'autre part une hauteur h, entre une surface libre 40 et une embase 42 située au niveau de la surface d'appui circulaire 38. Cette hauteur h est sensiblement inférieure à la hauteur H du rebord cylindrique 22.On the Figure 3 the only cylindrical element made of cork 12 is the shoulder 14, which defines the cylindrical part 16 and the gripping part 18 of the cylindrical cork element 12, a diameter greater than the cylindrical part 16. L shoulder 14 also defines a circular bearing surface 38, against the gripping portion 18. Furthermore, the cylindrical portion 16, on the one hand, has a diameter D2 substantially equal to the diameter D1 of the cylindrical flange 22 of the element 20, and secondly a height h, between a free surface 40 and a base 42 located at the circular bearing surface 38. This height h is substantially less than the height H of the cylindrical rim 22.

Ainsi, l'élément d'isolation 20 est destiné à venir coiffer la partie cylindrique 16 de l'élément cylindrique en liège 12 et à en être solidaire de manière à former le bouchon composite 10. Pour ce faire, on vient tout d'abord appliquer de la colle sur la surface libre 40 de la partie cylindrique 16, par exemple sous forme de gouttes uniformément réparties. Selon un mode de mise en oeuvre particulier, on applique des points de colle "hot-melt", soit par exemple de polyamide à l'état fondu. Ces points sont par exemple au nombre de six et régulièrement répartis à la périphérie de la surface libre 40. Ensuite, avant que la colle ne durcisse, on vient coiffer la partie cylindrique 16 avec l'élément d'isolation 20. Le diamètre de l'arête circulaire 28 est par définition inférieur au diamètre D2 de la partie cylindrique 16. Aussi, la bordure périphérique de la surface libre 40 de la partie cylindrique 16 vient tout d'abord s'appuyer contre la bordure 26 de la collerette 24, puis en forçant l'engagement de la partie cylindrique 16 à l'intérieur de l'espace cylindrique interne 21 de l'élément d'isolation 20, l'arrête circulaire 28 s'élargit sensiblement tandis que la partie cylindrique 16 se comprime radialement. L'élargissement de l'arête circulaire 28 est possible grâce au matériau polymère déformable, et la compression de la partie cylindrique 16 l'est par la nature du liège. En poursuivant l'engagement de la partie cylindrique 16 à l'intérieur de l'élément d'isolation 20, le bord externe de la collerette 24, opposé à la bordure 26, vient tout d'abord s'appliquer contre la bordure extérieure de la surface d'appui circulaire 38 de l'épaulement 14, tandis que la colle vient en contact avec le fond plat 19 de l'élément d'isolation 20. Ensuite, en comprimant l'un contre l'autre à force l'élément d'isolation 20 et l'élément cylindrique en liège 12, la collerette 24 et sa bordure 26 pivotent autour du bord externe de la collerette 24, et en bout de course, l'arête circulaire 28 s'enfonce dans l'embase 42 de la partie cylindrique 16, au niveau de la surface d'appui circulaire 38. Aussi, la collerette 24 et sa bordure 26 sont-elles en appui à plat contre la surface d'appui circulaire 38. Et en outre, les points de colle s'aplatissent et forment une fine pellicule entre le fond plat 19 et la surface cible 40. On réalise ainsi le bouchon composite 10 tel qu'illustré sur la Figure 4.Thus, the insulating element 20 is intended to cap the cylindrical portion 16 of the cylindrical element cork 12 and to be secured to form the composite plug 10. To do this, it comes first applying glue on the free surface 40 of the cylindrical portion 16, for example in the form of uniformly distributed drops. According to a particular embodiment, "hot-melt" adhesive dots, for example polyamide in the molten state, are applied. These points are for example six in number and regularly distributed on the periphery of the free surface 40. Then, before the glue hardens, the cylindrical portion 16 is capped with the insulating member 20. The diameter of the circular edge 28 is by definition less than the diameter D2 of the cylindrical portion 16. Also, the peripheral edge of the the free surface 40 of the cylindrical portion 16 first bears against the rim 26 of the collar 24, then forcing the engagement of the cylindrical portion 16 within the internal cylindrical space 21 of the 20, the circular stop 28 widens substantially while the cylindrical portion 16 compresses radially. The widening of the circular edge 28 is possible thanks to the deformable polymer material, and the compression of the cylindrical part 16 is by the nature of the cork. By continuing the engagement of the cylindrical portion 16 inside the insulating member 20, the outer edge of the flange 24, opposite the edge 26, is first applied against the outer edge of the circular bearing surface 38 of the shoulder 14, while the glue comes into contact with the flat bottom 19 of the insulating member 20. Then, compressing the one against the other by force the element 20 and the cork cylindrical member 12, the flange 24 and its edge 26 pivot around the outer edge of the flange 24, and at the stroke, the circular edge 28 sinks into the base 42 of the cylindrical portion 16, at the level of the circular bearing surface 38. Also, the flange 24 and its edge 26 are in flat support against the circular bearing surface 38. And in addition, the points of glue s flatten and form a thin film between the flat bottom 19 and the target surface 40. The composite plug is thus produced 10 as illustrated on the Figure 4 .

Ensuite, en libérant la pression de l'élément d'isolation 20 contre l'élément cylindrique en liège 12, l'élément d'isolation 20 demeure en position sur la partie cylindrique 16 et la collerette 24 à plat contre la surface d'appui circulaire 38, grâce à l'arête circulaire 28 ancrée dans l'embase 42. En effet, grâce à cet ancrage, l'élément d'isolation 20 est maintenu bloqué en translation sur la partie cylindrique 16. Ainsi, il n'est nullement besoin d'attendre le durcissement ou le séchage de la colle pour libérer l'élément d'isolation 20 l'élément cylindrique 12. Aussi, les temps de production des bouchons composites 10 est-il raccourci, ce qui diminue son coût de production unitaire.Then, by releasing the pressure of the insulating member 20 against the cylindrical cork member 12, the insulating member 20 remains in position on the cylindrical portion 16 and the flange 24 flat against the bearing surface circular 38, thanks to the circular edge 28 anchored in the base 42. Indeed, thanks to this anchoring, the insulation member 20 is kept locked in translation on the cylindrical portion 16. Thus, it is not at all need to wait for the curing or drying of the adhesive to release the insulating element 20 the cylindrical element 12. Also, the production times of the composite plugs 10 is shortened, which reduces its unit production cost .

En outre, grâce à la forme conique originelle de la collerette 24, qui s'aplatit alors contre la surface d'appui circulaire 38, les tensions résiduelles qui subsistent dans la collerette 24 et qui tendent à la ramener vers sa forme originelle, permettent de la maintenir à plat durant toute la vie du bouchon composite 10. En effet, au fil du temps, l'élément d'isolation 20 peut tendre à s'écarter de l'élément cylindrique en liège 12, et ce léger écartement est alors compensé par le retour élastique de la collerette 24, dont le bord libre externe demeure en contact avec la surface d'appui circulaire 38. Ainsi, le bouchon composite 10 demeure opérationnel.In addition, thanks to the original conical shape of the flange 24, which then flattens against the circular bearing surface 38, residual stresses that remain in the flange 24 and which tend to bring it back to its original shape, make it possible to keep it flat throughout the life of the composite plug 10. In fact, over time, the insulating member 20 may tend to deviate from the cylindrical cork member 12, and this slight spacing is then compensated by the elastic return of the flange 24, the outer free edge remains in contact with the circular bearing surface 38. Thus, the composite plug 10 remains operational.

Claims (10)

  1. Composite stopper (10) for closing containers having an opening delimited by a container edge, said composite stopper (10) comprising, on the one hand, a cylindrical cork element (12) having a shoulder (14) defining a cylindrical part (16) intended to close said opening and a bearing surface (38) intended to press against said container edge and, on the other hand, an insulating element (20) having a bottom (19) and a cylindrical rim (22) defining an internal space (21), said cylindrical rim (22) having a free edge (24), said insulating element (20) being intended to cap said cylindrical part (16) of said cylindrical cork element in order to be stuck, while said free edge (24) is applying against said bearing surface ;
    characterized in that said cylindrical rim (22) includes a circular anchoring edge (28) that extends within said internal space (21) ;
    and in that said circular anchoring edge (28) is intended to be anchored into said cylindrical part (16) of said cylindrical cork element (12) after the adhesive was deposited on said cylindrical part (16), when said insulating element (20) comes to cap said cylindrical part (16) and that the cylindrical part (16) made of cork is press-fit into the insulating element (20).
  2. Composite stopper according to claim 1, characterized in that said circular edge (28) extends along said free edge (24).
  3. Composite stopper according to claim 1 or 2, characterized in that said circular edge (28) has a triangular cross-section.
  4. Composite stopper according to any of claims 1 to 3, characterized in that said cylindrical rim (22) is provided with a flange (24) forming said free edge.
  5. Composite stopper according to claim 4, characterized in that said flange (24) includes an edge (26) radially extending into said internal space (21) in order to form said circular edge (28).
  6. Composite stopper according to claim 4 or 5, characterized in that said flange (24) makes a conical surface having its apex S into said internal space (21).
  7. Composite stopper according to any of claims 1 to 6, characterized in that said bottom (19) of said insulating element (20) is provided with a circular strengthening rib (30).
  8. Composite stopper according to any of claims 1 to 7, characterized in that said cylindrical rim (22) is provided with axial grooves (32) located outside from said internal space (21), and extending from said bottom (19) to said free edge (24) in order to form a vent.
  9. Composite stopper according to any of claims 1 to 8, characterized in that said insulating element (20) is unitary molded from a polymeric material.
  10. Composite stopper according to claim 9, characterized in that said insulating element (20) is molded from polyethylene.
EP13782797.8A 2012-10-04 2013-10-04 Composite stopper Active EP2903905B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1259413A FR2996531B1 (en) 2012-10-04 2012-10-04 COMPOSITE PLUG
PCT/FR2013/052361 WO2014053785A1 (en) 2012-10-04 2013-10-04 Composite stopper

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EP2903905A1 EP2903905A1 (en) 2015-08-12
EP2903905B1 true EP2903905B1 (en) 2017-12-13

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR954611A (en) * 1950-01-04
FR1398174A (en) * 1964-03-26 1965-05-07 Improvements to stoppers for sealing bottles or other similar containers
IT1308071B1 (en) * 1999-06-01 2001-11-29 Italco S R L PROCEDURE FOR CAPPING BOTTLES AND SIMILAR CONTAINERS, A BARRIER ELEMENT USED IN SUCH PROCEDURE, BOTTLE OR SIMILAR
EP1473241A1 (en) * 2003-04-30 2004-11-03 Vintec S.r.l Cork closure for bottles and corresponding production method
FR2866634B1 (en) * 2004-02-23 2006-09-22 Au Liegeur Ets J Pontneau Deni COMPOSITE PLUG

Also Published As

Publication number Publication date
FR2996531B1 (en) 2014-11-28
WO2014053785A1 (en) 2014-04-10
FR2996531A1 (en) 2014-04-11
EP2903905A1 (en) 2015-08-12

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