EP2105386A1 - Tamper-proof device for screw cap - Google Patents

Tamper-proof device for screw cap Download PDF

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Publication number
EP2105386A1
EP2105386A1 EP08405162A EP08405162A EP2105386A1 EP 2105386 A1 EP2105386 A1 EP 2105386A1 EP 08405162 A EP08405162 A EP 08405162A EP 08405162 A EP08405162 A EP 08405162A EP 2105386 A1 EP2105386 A1 EP 2105386A1
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EP
European Patent Office
Prior art keywords
neck
plug
cap
skirt
integral
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.)
Withdrawn
Application number
EP08405162A
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German (de)
French (fr)
Inventor
Jean-Denis Rochat
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to EP08405162A priority Critical patent/EP2105386A1/en
Priority to PCT/CH2009/000179 priority patent/WO2009146567A1/en
Publication of EP2105386A1 publication Critical patent/EP2105386A1/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
    • B65D41/3404—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with ratchet-and-pawl mechanism between the container and the closure skirt or the tamper element

Definitions

  • the present invention relates to a tamper-proof device for container screw closure comprising a closure cap screwed onto a neck of the container having at least one screw thread and a detent system comprising at least one abutment face integral with the neck and at least one resilient detent bulge integral with the stopper and whose minimum radial distance from the axis of revolution of the neck is less than the outer radius of the abutment face and ends with an abutment face whose angular position is chosen for that in the screwed position of the plug, the integral abutment faces of the neck, respectively of the plug are located opposite each other, to oppose the unscrewing of the plug.
  • the current screw plugs are conventionally formed of a cylindrical skirt provided on its inner face with a screw thread intended to cooperate with the screw thread complementary to the neck of the bottle.
  • the base of the skirt is extended by a tamperproof ring which is connected to the skirt by bridges of low mechanical tensile strength.
  • the tamper evident ring represents approximately 20% of the weight of the stopper of the order of 2.2 gr, while the material of the bottle dedicated to the placement and retention of this ring represents 1.2 gr / bottle or 4% to 8% of the mass of the bottle.
  • the present invention provides a means for making material gains while retaining the tamper-proof feature.
  • the plastic material used by the ring tamper device represents several thousand tons per year.
  • the elastic latching device is above the screw threads.
  • the stops integral with the neck of the container being above the screw threads, the angular length of the screw threads can not exceed the spaces between these stops, otherwise the threads of the cap could not be engaged with the steps of screw of the neck.
  • the joint angular length of the threads can not exceed 180.degree.
  • Since the spaces separating the abutments integral with the neck must also correspond to the respective lengths of the screw threads secured to the neck, each screw pitch of the plug. extending under the respective screw threads of the neck in the closed position of the cap.
  • Such a solution severely penalizes the pressure resistance of the closure and is in any case not acceptable for a pressure-resistant container, such as a popcock stopper.
  • the object of the present invention is to provide the same advantages as the screw caps provided with tamper-proof rings, but by saving the plastic material.
  • this invention relates to a tamper-proof device for container screw closure as defined by claim 1.
  • the proposed solution is both economical and environmentally friendly, reducing waste and consumption of petroleum-based products.
  • the removal of the tamper-evident ring facilitates the work of recovery of the plastic bottles, since it is no longer necessary to remove the tamper-proof ring from the neck of the colored PE bottle to recover the plastic of the bottle, usually in transparent PET.
  • the Figures 1 and 2 respectively illustrate the screw cap 1 and the neck 2 of a container 3, in particular a bottle and in particular a PET bottle, intended to receive the screw cap and having at least one screw thread 4 for this purpose.
  • screw threads preferably up to 4 are used, which makes it possible to limit the screwing angle of the plug.
  • the number of threads is three on the neck 2 and obviously on the inner face of the skirt 5 of the stopper 1.
  • the threads 4 of the neck 2 are normal threads whose exit end face 7 is in the form of abutment.
  • this end face 7 makes a right angle with the tangent to a circle centered on the axis of revolution of the neck 2 and passing through the intersection between this circle and the end face 7.
  • This end face 7 could obviously also make an acute angle with this tangent, as will be understood from reading the rest of the description.
  • the skirt or side wall 5 of the cap 1 comprises, in this example, three resilient snap-fastening elements 9 having an abutment face 8 which makes a right angle with the tangent to a circle centered on the axis of revolution of the skirt or lateral wall 5 and passing through the intersection between this circle and the abutment face 8.
  • This abutment face 8 could also make an acute angle with this tangent, preferably complementary to the acute angle of the end face 7 of the thread. screw 4 of the neck 2.
  • This abutment face 8 is situated at the end of an inwardly bulging part of a first elastic snap-fastening element 9 and is attached to the side wall 5 of the stopper 1 by at least one rupture element at the traction or tensile plastic elongation element 10.
  • the bulge of each resilient snap element 9 is located in the triangular or trapezoidal space available between the screw threads and the base of the skirt 5 of the cap 1.
  • the end of the snap elastic element 9 opposite the abutment 8 is articulated to a hinge element 11 by a first weakening 12, formed by a sudden thinning of the wall which extends parallel to the generatrix of the cylindrical side wall 5.
  • This hinge element 11 is itself connected to the side wall 5 by a second weakening 13 also formed by a sudden thinning which also extends parallel to the generatrix of the cylindrical side wall 5 of the plug 1.
  • the inner face of the elastic snap-on element 9 gradually thickens from the first weakening 12 to the abutment face 8.
  • the smallest radius between this thickening of the wall of the snap-fastening elastic element 9 and the axis of revolution of the neck 2 once the cap 1 screwed onto the neck 2 is chosen to be smaller than the outer radius of the screw threads 4 of the neck 2.
  • the threaded portion 4 of the neck 2 terminates in a flat annular portion 14.
  • any rotation of the stopper 1 in the counterclockwise direction from the position illustrated by FIG. figure 3 collides with the meeting of the two faces of stops. Given their radial orientation, or even their acute angles, these abutment faces offer resistance when the cap 1 is unscrewed. This resistance corresponds to the breaking strength of the tensile break element 10.
  • the plug 1 allows demolding without drawer or cut, which allows a safe manufacturing and at the same rates or higher than the standard tamper-proof caps of the prior art .
  • the saving made by the material economy is not achieved by the cost of a higher cost manufacturing process.
  • the second embodiment illustrated by the Figures 6 to 11 differs from the first essentially by the shape of the tamper device. It comprises a resilient snap-fastening element 29 whose inner face gradually thickens and ends with an abutment surface 28 which is placed in front of the abutment surface 27 formed at the end of the screw thread 24. arranged on the external face of the neck 22.
  • the snap elastic member 29 has the shape of a right-angled triangle whose hypotenuse is connected to the skirt 25 of the stopper 21 by a weakened portion 30.
  • This right-angled triangle forming the snap-fastening elastic element 29 is adjacent to a second identical right triangle forming the hinge member 31, the hypotenuse of which is connected to the skirt 25 of the stopper 21 by a weakened portion 33 intended to allow the articulation of the hypotenuse of the hinge member 31 with the skirt 25 of the cap 21.
  • the two adjacent sides of the snap-fastening elements 29 and the hinge elements 31 are also in a weakened part 32 intended to allow articulation between the latching element 29 and the articulation element 31.

Abstract

The device has a stop face (28) located at an end of a ratchet elastic expansion (29) and integrated to a rectangle triangle shape element that is attached to a skirt (25) of a cap (21) by a weakened portion (30). A side of the rectangle triangle shape element is adjacent to a side of a rectangle triangle shape articulation element (31) whose hypothenuse is connected to the skirt by a weakened portion (33). The expansion (29) is attached to the skirt of the cap dimensioned for being deformed in a plastic manner, during the unscrewing of the cap.

Description

La présente invention se rapporte à un dispositif inviolable pour fermeture à vis de récipient comportant un bouchon de fermeture vissé sur un goulot du récipient présentant au moins un filet de vis et un système d'encliquetage comprenant au moins une face de butée solidaire du goulot et au moins un renflement élastique d'encliquetage solidaire du bouchon et dont la distance radiale minimum de l'axe de révolution du goulot est inférieure au rayon externe de la face de butée et se termine par une face de butée dont la position angulaire est choisie pour qu'en position vissée du bouchon, les faces de butées solidaires du goulot, respectivement du bouchon se situent l'une en face de l'autre, pour s'opposer au dévissage du bouchon.The present invention relates to a tamper-proof device for container screw closure comprising a closure cap screwed onto a neck of the container having at least one screw thread and a detent system comprising at least one abutment face integral with the neck and at least one resilient detent bulge integral with the stopper and whose minimum radial distance from the axis of revolution of the neck is less than the outer radius of the abutment face and ends with an abutment face whose angular position is chosen for that in the screwed position of the plug, the integral abutment faces of the neck, respectively of the plug are located opposite each other, to oppose the unscrewing of the plug.

Les bouchons à vis actuels sont classiquement formés d'une jupe cylindrique pourvue sur sa face interne d'un pas de vis destiné à coopérer avec le pas de vis complémentaire du goulot de la bouteille. La base de la jupe est prolongée par une bague d'inviolabilité qui est relié à la jupe par des pontets de faible résistance à la traction mécanique.The current screw plugs are conventionally formed of a cylindrical skirt provided on its inner face with a screw thread intended to cooperate with the screw thread complementary to the neck of the bottle. The base of the skirt is extended by a tamperproof ring which is connected to the skirt by bridges of low mechanical tensile strength.

La bague d'inviolabilité représente environs 20% de la masse du bouchon de l'ordre de 2.2 gr, tandis que la matière de la bouteille consacrée au placement et à la retenue de cette bague représente 1.2 gr/bouteille soit 4% à 8% de la masse de la bouteille. La présente invention propose un moyen d'effectuer des gains de matière tout en conservant la fonction de dispositif de sécurité inviolable.The tamper evident ring represents approximately 20% of the weight of the stopper of the order of 2.2 gr, while the material of the bottle dedicated to the placement and retention of this ring represents 1.2 gr / bottle or 4% to 8% of the mass of the bottle. The present invention provides a means for making material gains while retaining the tamper-proof feature.

Compte tenu de la production mondiale de ce type de bouteilles, la matière plastique utilisée par le dispositif d'inviolabilité à bague représente plusieurs milliers de tonnes par an.Given the global production of this type of bottle, the plastic material used by the ring tamper device represents several thousand tons per year.

On a déjà proposé de remplacer la bague d'inviolabilité par un système d'encliquetage élastique permettant le vissage du bouchon, mais s'opposant à son dévissage tant qu'un élément d'inviolabilité solidaire de la jupe du bouchon n'est pas forcé. Un tel système a été proposé notamment dans le EP 1 650 135 , dans le WO 95/28334 et dans le WO 90/05681 .It has already been proposed to replace the tamper-proof ring by an elastic snap-in system allowing the cap to be screwed, but preventing its unscrewing as long as a tamper-evident element. integral with the skirt of the cap is not forced. Such a system has been proposed in particular in the EP 1,650,135 , in the WO 95/28334 and in the WO 90/05681 .

Dans le EP 1 650 135 comme dans le WO 95/28334 , le système d'encliquetage élastique se situe au-dessous du pas de vis en sorte qu'il occupe la place prise habituellement par la bague d'inviolabilité détachable et ne permet pas de réaliser une économie substantielle de matière, ni dans le bouchon ni dans la bouteille.In the EP 1,650,135 as in the WO 95/28334 the elastic snap-in system is located below the thread so that it occupies the place usually taken by the detachable tamper-evident ring and does not allow a substantial saving of material, either in the stopper or in the bottle.

Dans le WO 90/05681 , le dispositif d'encliquetage élastique se situe au-dessus des pas de vis. Les butées solidaires du goulot du récipient étant au-dessus des pas de vis, la longueur angulaire des pas de vis ne peut pas excéder les espaces séparant ces butées, sans quoi les pas de vis du bouchon ne pourraient pas être engagés avec les pas de vis du goulot. De ce fait, la longueur angulaire conjointe des pas de vis ne peut pas excéder 180°, puisque les espaces séparant les butées solidaires du goulot doivent aussi correspondre aux longueurs respectives des pas de vis solidaires du goulot, chaque pas de vis du bouchon s'étendant sous les pas de vis respectifs du goulot en position de fermeture du bouchon. Une telle solution pénalise gravement la résistance à la pression de la fermeture et n'est en tout cas pas acceptable pour un récipient devant tenir à la pression, tel qu'un bouchon pour boisson gazeuse.In the WO 90/05681 , the elastic latching device is above the screw threads. The stops integral with the neck of the container being above the screw threads, the angular length of the screw threads can not exceed the spaces between these stops, otherwise the threads of the cap could not be engaged with the steps of screw of the neck. As a result, the joint angular length of the threads can not exceed 180.degree., Since the spaces separating the abutments integral with the neck must also correspond to the respective lengths of the screw threads secured to the neck, each screw pitch of the plug. extending under the respective screw threads of the neck in the closed position of the cap. Such a solution severely penalizes the pressure resistance of the closure and is in any case not acceptable for a pressure-resistant container, such as a popcock stopper.

Le but de la présente invention est de procurer les mêmes avantages que les bouchons à vis muni de bagues d'inviolabilité, mais en économisant la matière plastique.The object of the present invention is to provide the same advantages as the screw caps provided with tamper-proof rings, but by saving the plastic material.

A cet effet, cette invention a pour objet un dispositif inviolable pour fermeture à vis de récipient tel que défini par la revendication 1.For this purpose, this invention relates to a tamper-proof device for container screw closure as defined by claim 1.

La solution proposée présente un intérêt à la fois économique et écologique permettant de réduire les déchets et la consommation de produit à base de pétrole. De plus, la suppression de la bague d'inviolabilité facilite le travail de récupération des bouteilles plastique, puisqu'il n'est plus nécessaire d'enlever la bague d'inviolabilité du goulot de la bouteille en PE coloré pour récupérer le plastique de la bouteille, généralement en PET transparent.The proposed solution is both economical and environmentally friendly, reducing waste and consumption of petroleum-based products. In addition, the removal of the tamper-evident ring facilitates the work of recovery of the plastic bottles, since it is no longer necessary to remove the tamper-proof ring from the neck of the colored PE bottle to recover the plastic of the bottle, usually in transparent PET.

Les dessins annexés illustrent, schématiquement et à titre d'exemple, une forme d'exécution du dispositif inviolable pour fermeture à vis de récipient objet de la présente invention.

  • La figure 1 est une vue en perspective du bouchon vu de dessous;
  • la figure 2 est une vue en perspective du goulot du récipient destiné à être fermé par le bouchon de la figure 1;
  • la figure 3 est une vue partielle en coupe perpendiculairement à l'axe de révolution du goulot et du bouchon de ces deux éléments en position assemblée;
  • la figure 4 est une vue semblable à la figure 3, après rupture du dispositif d'inviolabilité;
  • la figure 5 est une vue semblable à la figure 3, lorsque le bouchon est vissé la première fois;
  • la figure 6 est une vue partielle en perspective avec arrachement d'un récipient fermé par un bouchon selon une seconde forme d'exécution;
  • la figure 7 est une vue en perspective de dessous du bouchon seul;
  • la figure 8 est une vue partielle en coupe selon VII-VII de la figure 5;
  • la figure 9 est une vue semblable à la figure 8 montrant la déformation du dispositif d'inviolabilité et la rupture d'une partie affaiblie lors de l'ouverture du bouchon ;
  • la figure 10 est une vue semblable à la figure 8 comprenant un élément de déformation plastique à la place d'un élément de rupture;
  • la figure 11 est une vue semblable à la figure 10 montrant la déformation du système d'inviolabilité et plus particulièrement la déformation plastique de la partie affaiblie.
The accompanying drawings illustrate, schematically and by way of example, one embodiment of the tamper-proof device for container screw closure object of the present invention.
  • The figure 1 is a perspective view of the cap seen from below;
  • the figure 2 is a perspective view of the neck of the container to be closed by the cap of the figure 1 ;
  • the figure 3 is a partial sectional view perpendicular to the axis of revolution of the neck and the plug of these two elements in the assembled position;
  • the figure 4 is a view similar to the figure 3 after breaking the tamper device;
  • the figure 5 is a view similar to the figure 3 when the cap is screwed the first time;
  • the figure 6 is a partial perspective view cutaway of a container closed by a stopper according to a second embodiment;
  • the figure 7 is a perspective view from below of the cap alone;
  • the figure 8 is a partial sectional view according to VII-VII of the figure 5 ;
  • the figure 9 is a view similar to the figure 8 showing the deformation of the tamper device and the breaking of a weakened part when the plug is opened;
  • the figure 10 is a view similar to the figure 8 comprising a plastic deformation element in place of a rupture element;
  • the figure 11 is a view similar to the figure 10 showing the deformation of the inviolability system and more particularly the plastic deformation of the weakened part.

Les figures 1 et 2 illustrent respectivement le bouchon à vis 1 et le goulot 2 d'un récipient 3, notamment une bouteille et en particulier une bouteille en PET, destiné à recevoir le bouchon à vis et présentant à cet effet au moins un filet de vis 4.The Figures 1 and 2 respectively illustrate the screw cap 1 and the neck 2 of a container 3, in particular a bottle and in particular a PET bottle, intended to receive the screw cap and having at least one screw thread 4 for this purpose.

De son côté la face interne de la paroi latérale cylindrique 5 ou de la jupe du bouchon 1 présente autant de filets de vis 6 que le goulot 2, destinés à s'engager sous les filets de vis 4 respectifs du goulot 2.On its side the inner face of the cylindrical side wall 5 or the skirt of the cap 1 has as many screw threads 6 as the neck 2, intended to engage under the respective screw threads 4 of the neck 2.

Avantageusement, on utilisera plusieurs filets de vis, jusqu'à 4 de préférence, ce qui permet de limiter l'angle de vissage du bouchon. Dans l'exemple décrit le nombre de filets est de trois sur le goulot 2 et évidemment sur la face interne de la jupe 5 du bouchon 1.Advantageously, several screw threads, preferably up to 4, are used, which makes it possible to limit the screwing angle of the plug. In the example described, the number of threads is three on the neck 2 and obviously on the inner face of the skirt 5 of the stopper 1.

Les filets 4 du goulot 2 sont des filets normaux dont la face terminale de sortie 7 est en forme de butée. A cet effet, cette face terminale 7 fait un angle droit avec la tangente à un cercle centré sur l'axe de révolution du goulot 2 et passant par l'intersection entre ce cercle et la face terminale 7. Cette face terminale 7 pourrait évidemment aussi faire un angle aigu avec cette tangente, comme on le comprendra à la lecture de la suite de la description.The threads 4 of the neck 2 are normal threads whose exit end face 7 is in the form of abutment. For this purpose, this end face 7 makes a right angle with the tangent to a circle centered on the axis of revolution of the neck 2 and passing through the intersection between this circle and the end face 7. This end face 7 could obviously also make an acute angle with this tangent, as will be understood from reading the rest of the description.

La jupe ou paroi latérale 5 du bouchon 1 comporte, dans cet exemple, trois éléments élastiques d'encliquetage 9 présentant une face de butée 8 qui fait un angle droit avec la tangente à un cercle centré sur l'axe de révolution de la jupe ou paroi latérale 5 et passant par l'intersection entre ce cercle et la face de butée 8. Cette face de butée 8 pourrait aussi faire un angle aigu avec cette tangente, de préférence complémentaire avec l'angle aigu de la face terminale 7 du filet de vis 4 du goulot 2.The skirt or side wall 5 of the cap 1 comprises, in this example, three resilient snap-fastening elements 9 having an abutment face 8 which makes a right angle with the tangent to a circle centered on the axis of revolution of the skirt or lateral wall 5 and passing through the intersection between this circle and the abutment face 8. This abutment face 8 could also make an acute angle with this tangent, preferably complementary to the acute angle of the end face 7 of the thread. screw 4 of the neck 2.

Cette face de butée 8 est située à l'extrémité d'une partie renflée vers l'intérieur d'un premier élément élastique d'encliquetage 9 et est rattachée à la paroi latérale 5 du bouchon 1 par au moins un élément de rupture à la traction ou un élément d'allongement plastique à la traction 10. Le renflement de chaque élément élastique d'encliquetage 9 se situe dans l'espace triangulaire ou trapézoïdal disponible entre les filets de vis et la base de la jupe 5 du bouchon 1.This abutment face 8 is situated at the end of an inwardly bulging part of a first elastic snap-fastening element 9 and is attached to the side wall 5 of the stopper 1 by at least one rupture element at the traction or tensile plastic elongation element 10. The bulge of each resilient snap element 9 is located in the triangular or trapezoidal space available between the screw threads and the base of the skirt 5 of the cap 1.

L'extrémité de l'élément élastique d'encliquetage 9 opposée à la butée 8 est articulée à un élément d'articulation 11 par un premier affaiblissement 12, formé par un brusque amincissement de la paroi qui s'étend parallèlement à la génératrice de la paroi latérale cylindrique 5. Cet élément d'articulation 11 est lui-même relié à la paroi latérale 5 par un second affaiblissement 13 également formé par un brusque amincissement qui s'étend aussi parallèlement à la génératrice de la paroi latérale cylindrique 5 du bouchon 1. Ces deux affaiblissements 12 et 13 forment des charnières entre l'éléments élastique d'encliquetage 9 et l'élément d'articulation 11.The end of the snap elastic element 9 opposite the abutment 8 is articulated to a hinge element 11 by a first weakening 12, formed by a sudden thinning of the wall which extends parallel to the generatrix of the cylindrical side wall 5. This hinge element 11 is itself connected to the side wall 5 by a second weakening 13 also formed by a sudden thinning which also extends parallel to the generatrix of the cylindrical side wall 5 of the plug 1. These two weakens 12 and 13 form hinges between the resilient snap-fastening element 9 and the hinge element 11.

La face interne de l'élément élastique d'encliquetage 9 s'épaissit progressivement du premier affaiblissement 12 à la face de butée 8. Le plus petit rayon entre cet épaississement de la paroi de l'élément élastique d'encliquetage 9 et l'axe de révolution du goulot 2 une fois le bouchon 1 vissé sur le goulot 2 est choisi pour être inférieur au rayon externe des filets de vis 4 du goulot 2.The inner face of the elastic snap-on element 9 gradually thickens from the first weakening 12 to the abutment face 8. The smallest radius between this thickening of the wall of the snap-fastening elastic element 9 and the axis of revolution of the neck 2 once the cap 1 screwed onto the neck 2 is chosen to be smaller than the outer radius of the screw threads 4 of the neck 2.

La partie filetée 4 du goulot 2 se termine par une partie annulaire plane 14.The threaded portion 4 of the neck 2 terminates in a flat annular portion 14.

Lorsque le bouchon 1 de la figure 1 est vissé pour la première fois sur le goulot 2, durant la fin de la phase de vissage du bouchon 1, la face interne, renflée vers l'intérieur, de l'élément élastique d'encliquetage 9 rencontre le filet de vis 4 du goulot 1, provoquant une déformation élastique centrifuge des éléments 9, 11. Cette déformation est choisie pour rester dans la limite de déformation élastique de la matière plastique du bouchon 1.When the cap 1 of the figure 1 is screwed for the first time on the neck 2, during the end of the screwing phase of the plug 1, the inner face, bulging inwardly, of the resilient snap element 9 meets the screw thread 4 of the neck 1, causing a centrifugal elastic deformation of the elements 9, 11. This deformation is chosen to remain within the limit of elastic deformation of the plastic material of the plug 1.

Lorsque cette surface interne renflée de l'élément élastique d'encliquetage 9 a dépassé la face terminale de sortie 7 du filet de vis 4, les éléments 9, 11 déformés vers l'extérieur peuvent reprendre leur forme initiale illustrée par la figure 3.When this inner surface of the snap elastic element 9 has protruded from the exit end face 7 of the screw thread 4, the outwardly deformed elements 9, 11 can return to their original shape as illustrated by FIG. figure 3 .

Comme on le constate, toute rotation du bouchon 1 dans le sens contraire à celui des aiguilles d'une montre à partir de la position illustrée par la figure 3 se heurte à la rencontre des deux faces de butées. Compte tenu de leur orientation radiale, voire de leurs angles aigus, ces faces de butées offrent une résistance au dévissage du bouchon 1. Cette résistance correspond à la résistance de rupture de l'élément de rupture à la traction 10.As can be seen, any rotation of the stopper 1 in the counterclockwise direction from the position illustrated by FIG. figure 3 collides with the meeting of the two faces of stops. Given their radial orientation, or even their acute angles, these abutment faces offer resistance when the cap 1 is unscrewed. This resistance corresponds to the breaking strength of the tensile break element 10.

Dès que l'on applique au bouchon 1 une force de dévissage dépassant la résistance de rupture de l'élément 10, celui-ci se rompt, permettant aux éléments 9, 11 de se déplacer de manière visible dans la position illustrée par la figure 4, dans laquelle la face de butée 8 est écartée de la face terminale de butée 7, autorisant le dévissage du bouchon 1.As soon as a stopper force is applied to the plug 1 that exceeds the breaking strength of the element 10, the latter breaks, allowing the elements 9, 11 to move in a visible manner in the position illustrated by FIG. figure 4 , in which the stop face 8 is spaced from the end stop face 7, allowing the stopper 1 to be unscrewed.

Ce dispositif inviolable est irréversible, permettant de constater que le récipient a été ouvert, de manière beaucoup plus évidente que ce n'est le cas des systèmes avec bague détachable de l'art antérieur.This inviolable device is irreversible, allowing to note that the container has been opened, much more obviously than is the case with the detachable ring systems of the prior art.

Parmi les avantages de la forme d'exécution décrite ici, il faut mentionner que le bouchon 1 permet un démoulage sans tiroir ni découpe, ce qui permet une fabrication sûre et aux mêmes cadences voire plus élevées que les bouchons inviolables standards de l'art antérieur. Par conséquent, le gain réalisé par l'économie de matière ne l'est pas au prix d'un processus de fabrication de coût plus élevé.Among the advantages of the embodiment described here, it should be mentioned that the plug 1 allows demolding without drawer or cut, which allows a safe manufacturing and at the same rates or higher than the standard tamper-proof caps of the prior art . As a result, the saving made by the material economy is not achieved by the cost of a higher cost manufacturing process.

La seconde forme d'exécution illustrée par les figures 6 à 11 diffère de la première essentiellement par la forme du dispositif d'inviolabilité. Celui-ci comporte un élément élastique d'encliquetage 29 dont la face interne s'épaissit progressivement pour se terminer par une surface de butée 28 qui vient se placer en face de la surface de butée 27 formée à l'extrémité du filet de vis 24 ménagé sur la face externe du goulot 22.The second embodiment illustrated by the Figures 6 to 11 differs from the first essentially by the shape of the tamper device. It comprises a resilient snap-fastening element 29 whose inner face gradually thickens and ends with an abutment surface 28 which is placed in front of the abutment surface 27 formed at the end of the screw thread 24. arranged on the external face of the neck 22.

L'élément élastique d'encliquetage 29 a la forme d'un triangle rectangle dont l'hypoténuse est reliée à la jupe 25 du bouchon 21 par une partie affaiblie 30. Ce triangle rectangle formant l'élément élastique d'encliquetage 29 est adjacent à un second triangle rectangle identique formant l'élément d'articulation 31, dont l'hypoténuse est reliée à la jupe 25 du bouchon 21 par une partie affaiblie 33 destinée à permettre l'articulation de l'hypoténuse de l'élément d'articulation 31 avec la jupe 25 du bouchon 21. Les deux côtés adjacents des éléments d'encliquetage 29 et d'articulation 31 se situent également dans une partie affaiblie 32 destinée à permettre l'articulation entre l'élément d'encliquetage 29 et l'élément d'articulation 31.The snap elastic member 29 has the shape of a right-angled triangle whose hypotenuse is connected to the skirt 25 of the stopper 21 by a weakened portion 30. This right-angled triangle forming the snap-fastening elastic element 29 is adjacent to a second identical right triangle forming the hinge member 31, the hypotenuse of which is connected to the skirt 25 of the stopper 21 by a weakened portion 33 intended to allow the articulation of the hypotenuse of the hinge member 31 with the skirt 25 of the cap 21. The two adjacent sides of the snap-fastening elements 29 and the hinge elements 31 are also in a weakened part 32 intended to allow articulation between the latching element 29 and the articulation element 31.

Il est possible d'envisager une alternative à la rupture entre l'hypoténuse de l'élément élastique d'encliquetage triangulaire 29 et la jupe 25 du bouchon 21 lors de l'ouverture initiale du bouchon. On peut en effet choisir de dimensionner l'affaiblissement 30 de l'hypoténuse du triangle adjacente à la jupe 25 de manière à ce que la matière plastique s'étire au-delà de sa limite élastique au lieu de rompre, comme illustré par la figure 10 lors de l'encliquetage et la figure 11 après ouverture du bouchon inviolable en sorte que l'on évite tout risque que les triangles adjacents 29 et 31 ne se détachent de la jupe 25 du bouchon 21 ou que les éléments élastiques d'encliquetage 29 et de d'articulation 31 reviennent élastiquement sur sa position après la première ouverture et ne montre pas clairement la violation de la fermeture.It is possible to envisage an alternative to the rupture between the hypotenuse of the triangular elastic snap-fastening element 29 and the skirt 25 of the stopper 21 during the initial opening of the stopper. It can indeed be chosen to size the weakening of the hypotenuse of the triangle adjacent to the skirt 25 so that the plastic stretches beyond its elastic limit instead of breaking, as illustrated by FIG. figure 10 when snapping and figure 11 after opening the tamperproof cap so that it avoids any risk that the adjacent triangles 29 and 31 are detached from the skirt 25 of the cap 21 or that the resilient snap-fastening elements 29 and articulation 31 return elastically on its position after the first opening and does not clearly show the violation of the closure.

Claims (5)

Dispositif inviolable pour fermeture à vis de récipient, comportant un bouchon de fermeture (2) vissé sur un goulot (1) du récipient (3) présentant au moins un filet de vis (4) et un système d'encliquetage comprenant au moins une face de butée (7) solidaire du goulot et au moins un renflement élastique d'encliquetage (9) solidaire du bouchon (2) et dont la distance radiale minimum de l'axe de révolution du goulot (1) est inférieure au rayon externe de la face de butée (7) et se termine par une face de butée (8) dont la position angulaire est choisie pour qu'en position vissée du bouchon (2), les faces de butées (7, 8) solidaires du goulot, respectivement du bouchon se situent l'une en face de l'autre, pour s'opposer au dévissage du bouchon (2), caractérisé en ce que la face de butée (7) solidaire du goulot (1) est une face terminale de sortie (7) du filet de vis qui s'étend angulairement sur au moins 360°, ledit renflement élastique d'encliquetage (9) se situant en position vissée du bouchon dans l'espace libre qui fait suite à l'extrémité terminale de sortie (7) du filet de vis, dans la hauteur du pas de vis.Tamper-proof device for container screw closure, comprising a closure plug (2) screwed onto a neck (1) of the container (3) having at least one screw thread (4) and a latching system comprising at least one face abutment (7) integral with the neck and at least one resilient snap-in bulge (9) integral with the plug (2) and whose minimum radial distance from the axis of revolution of the neck (1) is less than the outer radius of the abutment face (7) and ends with an abutment face (8) whose angular position is chosen so that in the screwed position of the plug (2), the abutment faces (7, 8) integral with the neck, respectively the plug are located opposite each other, to oppose the unscrewing of the plug (2), characterized in that the abutment face (7) integral with the neck (1) is an exit end face (7). ) of the screw thread which extends angularly over at least 360 °, said elastic detent snap (9) lying in screwed position of the plug in the free space which follows the end terminal (7) of the screw thread, in the height of the thread. Dispositif selon la revendication 1, dans lequel la face de butée (8) située à une extrémité du renflement élastique est reliée à la paroi latérale (5) du bouchon de fermeture (1) d'une part par au moins un élément de rupture à la traction (10), d'autre part par deux articulations (12, 13) autour de lignes d'affaiblissement parallèles à la génératrice de la paroi latérale (5) de l'organe de fermeture (1).Device according to claim 1, wherein the abutment face (8) located at one end of the elastic bulge is connected to the side wall (5) of the closure cap (1) on the one hand by at least one rupture element to the traction (10), on the other hand by two joints (12, 13) around lines of weakness parallel to the generatrix of the side wall (5) of the closure member (1). Dispositif selon l'une des revendications précédentes, dans lequel le goulot et le bouchon comportent chacun plusieurs pas de vis qui s'étendent conjointement sur au moins 360°.Device according to one of the preceding claims, wherein the neck and the cap each comprise several screw threads which extend jointly over at least 360 °. Dispositif selon l'une des revendications 1 et 3, dans lequel la face de butée (28) située à une extrémité du renflement élastique d'encliquetage (29) est solidaire d'un élément et forme de triangle rectangle rattaché à la jupe (25) du bouchon (21) par une partie affaiblie (30) s'étendant le long de son hypoténuse, un autre côté de cet élément en forme de triangle rectangle est adjacent à un côté d'un élément d'articulation (31) en forme de triangle rectangle dont l'hypoténuse est reliée à la jupe (25) du bouchon (21) par une partie affaiblie (33) servant d'articulation.Device according to one of claims 1 and 3, wherein the abutment face (28) located at one end of the snap elastic bulge (29) is integral with a member and form of a right triangle attached to the skirt (25). ) of the stopper (21) by a weakened portion (30) extending along its hypotenuse, another side of this right-angled triangle-shaped member is adjacent to one side of a shaped hinge member (31) of a right triangle whose hypotenuse is connected to the skirt (25) of the cap (21) by a weakened portion (33) serving as a hinge. Dispositif selon l'une des revendications 1, 3 et 4, dans lequel, le renflement élastique d'encliquetage (9, 29) est rattaché à la jupe (5, 25) du bouchon (1, 21) par une partie affaiblie (10, 30) dimensionnée pour se déformer de manière plastique lors du dévissage du bouchon.Device according to one of claims 1, 3 and 4, wherein the resilient snap-in bulge (9, 29) is attached to the skirt (5, 25) of the stopper (1, 21) by a weakened portion (10). , 30) dimensioned to deform plastically during unscrewing of the plug.
EP08405162A 2008-06-04 2008-06-25 Tamper-proof device for screw cap Withdrawn EP2105386A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP08405162A EP2105386A1 (en) 2008-06-25 2008-06-25 Tamper-proof device for screw cap
PCT/CH2009/000179 WO2009146567A1 (en) 2008-06-04 2009-05-27 Tamper-proof device for threaded closure for container

Applications Claiming Priority (1)

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EP08405162A EP2105386A1 (en) 2008-06-25 2008-06-25 Tamper-proof device for screw cap

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EP2105386A1 true EP2105386A1 (en) 2009-09-30

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009541158A (en) * 2006-06-30 2009-11-26 テトラ ラバル ホールデイングス エ フイナンス ソシエテ アノニム OPENING DEVICE, SCREW CAP USED FOR THE OPENING DEVICE, AND METHOD FOR FORMING THE OPENING DEVICE
DE102021132171A1 (en) 2021-12-07 2023-06-07 Georg Menshen Gmbh & Co. Kg pouring device

Citations (7)

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Publication number Priority date Publication date Assignee Title
WO1990005681A1 (en) 1988-11-23 1990-05-31 Lawson Mardon (M.I.) Limited Tamper evident closure
GB2240098A (en) * 1990-01-20 1991-07-24 Montgomery Daniel & Son Ltd Closure with tamper-indicating device
GB2277320A (en) * 1993-04-02 1994-10-26 Able Ind Ltd Container and tamper evident closure.
WO1995028334A1 (en) 1994-04-15 1995-10-26 G V Engineering Pty Ltd Tamper evident closure
WO1997008071A1 (en) * 1995-08-30 1997-03-06 G. V. Engineering Pty. Ltd. Tamper evident closure
EP1650135A1 (en) 2003-07-22 2006-04-26 Barangüa, S.L. Screw cap for container
WO2007085927A2 (en) * 2006-01-27 2007-08-02 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Closure means

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990005681A1 (en) 1988-11-23 1990-05-31 Lawson Mardon (M.I.) Limited Tamper evident closure
GB2240098A (en) * 1990-01-20 1991-07-24 Montgomery Daniel & Son Ltd Closure with tamper-indicating device
GB2277320A (en) * 1993-04-02 1994-10-26 Able Ind Ltd Container and tamper evident closure.
WO1995028334A1 (en) 1994-04-15 1995-10-26 G V Engineering Pty Ltd Tamper evident closure
WO1997008071A1 (en) * 1995-08-30 1997-03-06 G. V. Engineering Pty. Ltd. Tamper evident closure
EP1650135A1 (en) 2003-07-22 2006-04-26 Barangüa, S.L. Screw cap for container
WO2007085927A2 (en) * 2006-01-27 2007-08-02 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Closure means

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009541158A (en) * 2006-06-30 2009-11-26 テトラ ラバル ホールデイングス エ フイナンス ソシエテ アノニム OPENING DEVICE, SCREW CAP USED FOR THE OPENING DEVICE, AND METHOD FOR FORMING THE OPENING DEVICE
US8256632B2 (en) 2006-06-30 2012-09-04 Tetra Laval Holdings & Finance S.A. Tamper-evident opening device, screw cap for use in such an opening device and method of forming such an opening device
DE102021132171A1 (en) 2021-12-07 2023-06-07 Georg Menshen Gmbh & Co. Kg pouring device

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