EP0677451A1 - Screw cap for the sealing of the neck of a container - Google Patents

Screw cap for the sealing of the neck of a container Download PDF

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Publication number
EP0677451A1
EP0677451A1 EP95420088A EP95420088A EP0677451A1 EP 0677451 A1 EP0677451 A1 EP 0677451A1 EP 95420088 A EP95420088 A EP 95420088A EP 95420088 A EP95420088 A EP 95420088A EP 0677451 A1 EP0677451 A1 EP 0677451A1
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EP
European Patent Office
Prior art keywords
neck
screw cap
edge
cap according
sector
Prior art date
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Granted
Application number
EP95420088A
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German (de)
French (fr)
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EP0677451B1 (en
Inventor
Bernard Guglielmini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rical SA
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Rical SA
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Publication date
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
    • B65D41/3423—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt
    • B65D41/3428—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt the tamper element being integrally connected to the closure by means of bridges

Definitions

  • the present invention relates to screw closure capsules that can be used in the usual manner for the sealed closure of containers, such as bottles, the neck of which comprises means of cooperation complementary to the capsule to allow mounting and dismounting of the screw type.
  • the object of the invention relates more particularly to capsules manufactured by molding, in semi-rigid plastic material, and it more specifically still targets capsules which are provided with a tamper-evident indicator guaranteeing to the user that the container in its integrity was not broken before the first opening made by the user.
  • the capsules of the above type generally comprise a top bordered by a substantially cylindrical skirt, provided on its internal face with a helical thread intended to cooperate with a thread complementary to the neck.
  • the base of the skirt is extended by a tamper-evident ring which is linked to the skirt by bridges or bridges of low mechanical tensile strength.
  • the tamper-evident ring comprises, from its base and in the direction of the internal peripheral surface, a so-called stop strip which is intended to come to brace under a projection of the neck of the neck of the container in the position of mounting and closing.
  • the stop band remains immobilized by the projection of the neck of the container, which causes the breakable bridges to break allowing the capsule to be removed while leaving the suitable tamper-evident ring on the neck.
  • the prior art has proposed numerous embodiments for manufacturing such a capsule provided with a tamper-evident ring. It can be considered that the prior art knows two main families of rings.
  • the first is made to include, as a stop strip, a plurality of petals folded inwards.
  • the second is carried out so that the stop strip occurs continuously.
  • the capsules of the second family have a better guarantee of security, given that the continuous strip is, by its nature, less subject to unwinding during opening compared to the petals, the smaller section and greater flexibility of which allow such a risk of malfunction to exist during first opening.
  • the subject of the invention relates more particularly to capsules of the second family which can be illustrated in particular by European patent 0 200 293.
  • a second step it is then necessary to bend the continuous strip towards the inside of the capsule, for example by rolling, so that after the first assembly, it is able to act by bracing coming from under the protrusion of the neck of the container neck.
  • the object of the invention is precisely to remedy the above drawbacks, by proposing a new screw and belt capsule or indicator of violence of continuous type and which can be manufactured without requiring a recovery operation to return or bend towards the 'Inside the continuous stop band, as required by the means currently known and implemented.
  • Figure 1 is a perspective of a capsule according to the invention.
  • FIG. 2 is a half-elevation half-section, on a smaller scale, of the capsule according to FIG. 1 .
  • Figure 3 is a plan view taken along line III-III of Figure 2 .
  • Figure 4 is a perspective, on a larger scale, of the tamper-evident belt separated from the capsule to reveal more precisely the constructive characteristics.
  • FIG. 5 is a partial section taken, on a larger scale, along the line V - V of FIG. 3 .
  • Figure 6 is a partial sectional elevation illustrating an alternative embodiment of the object of the invention.
  • the screw cap according to the invention comprises a top 1 bordered by a substantially circular skirt 2 , provided externally with means 3 intended to facilitate handling.
  • the means 3 can be constituted, by way of example, by grooves or the like formed in an axial direction.
  • the skirt 2 carries on its internal peripheral face means 4 for mounting by screwing and disassembly by unscrewing on the neck or neck of a container R which usually comprises elements of conformation complementary to the means 4 .
  • the means 4 can consist of one or more continuous or discontinuous helical threads.
  • the inner face of the top 1 can be fitted with an attached seal or optionally be provided with a circular lip 5 intended to penetrate inside the neck or the neck, to ensure, alone or in combination with a seal , the sealing function in the closed position of the capsule.
  • the above capsule is produced by molding in a single operation from an appropriate raw material, in particular a thermoplastic polymer, of the polyolefin type for example.
  • the base of the skirt 2 is extended by a tamper-evident ring 6 , molded, which is linked to the base of the skirt by bridges or breakable bridges 7 having low mechanical tensile strength.
  • the tamper-evident ring 6 comprises a belt 8 , the base 9 of which is extended, beyond a connection ply 10 , by a stop strip 11 of continuous nature which is bent inclined inwardly of the capsule and towards the top 1 .
  • the strip 11 is produced to have a continuous upper end edge 15 defining an abutment plane P - P ' which is orthogonal to the axis x - x' of revolution of the skirt 2 .
  • the continuous upper end edge 15 is intended to engage and brace under the continuous or discontinuous peripheral projection S presented externally by the neck or the neck of the container R , when the capsule 2 is mounted on the latter. Such cooperation is in the known field and for this reason, only a representation in dashed lines appears in Figure 2 .
  • the strip 11 within the meaning of the invention also comprises from place to place zones 16 of thinner thickness, but of non-breakable nature, the presence of which has the effect of delimiting in the strip 11 a plurality of sectors 17 generally covering the same angular range.
  • Each zone 16 is preferably made in the form of a notch, of axial general direction, having a depth increasing towards the edge 15 , so as to be substantially flush with the latter, as illustrated by Figures 1 and 4 more particularly.
  • each notch 16 originates substantially from the connection ply 10 , to relate to the entire useful height of the strip 11 .
  • the strip 11 has six notches 16 which delimit between them in the strip 11 six sectors 17 .
  • Such an exemplary embodiment is given only by way of illustration, because, depending on the sizes or the diameters of capsules, it may be envisaged to reduce or increase the number of notches 16 .
  • the strip 11 is produced by molding, so that each sector 17 is provided, on its internal peripheral face with respect to the axis x - x ' , of a rib 20 in the form of lunula which has an edge 21 subtending the sector 17 in the manner of a cord.
  • Each edge 21 is preferably rectilinear and is arranged in a plane which is between the plane P - P ' and the connection ply 10 .
  • the different ribs 20 thus define by their edges 21 a polygonal section more particularly illustrated in FIG. 3 and whose inscribed circle C is of a diameter D which is less than the largest diameter of the neck or the neck of the container.
  • each rib 20 is connected to the interior face of the sector 17 by a face 22 and to the continuous edge 15 by a face 23 .
  • FIGS. 1 , 2 and 4 show that the face 23 is curved and made so as to be flush with the edge 15 in its middle part.
  • the production of the strip 11 according to the invention and as described above has the objective of forming a continuous strip made up of successive sectors of relatively rigid nature and which are interconnected by the zones 16 of which the smallest thickness has two functions.
  • the first function is to admit a tensile or compressive stress capacity which makes it possible to mold the strip 11 in the original position, as illustrated by the drawings, and to release the capsule obtained by ejection and axial thrust with turning. flexible strip to facilitate ejection from the mold core.
  • the second function is to give the strip a kind of shape memory which, after the stretching constraint imposed during the demolding phase, automatically brings the strip 11 back into its inwardly bent position which is the one which is conferred on it by nature to cooperate with the projection of the neck, as shown in FIG. 2 .
  • the first plugging involves exerting an axial stress to fit the capsule onto the neck of the container.
  • edges 21 reduces the friction or the friction at the point of contact of each with the periphery of the neck and makes it possible to ensure, by axial constraint, an interlocking of the capsule which is facilitated by the bending ability of the strip 11 towards the interior authorized by the presence of the notches 16 .
  • the strip 11 When the nesting is carried out, the strip 11 , by means of the notches 16 , restores the work stored by the stretching stress undergone, so that by shape memory, it tends to readjust its original stable position in which the edge 15 is brought back under the projection S of the neck of the container, as illustrated in FIG. 2 .
  • stop strip 11 in its functional position, makes it possible to eliminate the usual phase or resumption of turning and therefore to increase the production rate, to increase the number of impressions which can be produced in a mold due to the absence of the sliders necessary for molding the conventional turning bands and being able to produce closure caps in this way at a lower cost price than current capsules.
  • the constructive measures implemented also make it possible to obtain a tamper-evident belt 6 having great operational safety, mainly due to the existence of the continuous edge 15 and to the presence of the ribs 20 , the upper faces 23 of which form a firm and resistant bracing.
  • the presence of the ribs 20 opposes, moreover, any risk of unwinding of the strip 11 on the fold 10 during the unscrewing of the capsule, so that by the bracing carried out, an effective rupture of the bridges 7 occurs from the first unscrewing action imposed on the capsule.
  • Another advantage is also due to the fact that the ribs 20 , due to the presence of the edges 21 and the faces 22 , which respectively limit the surface contact and constitute sorts of engagement ramps, make it possible to assemble the capsule automatically without using means capable of developing a strong axial thrust requiring significant energy consumption.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Medicinal Preparation (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The screw cap comprises a top (1), a cylindrical skirt (2) having a helical thread (4) on its internal face, and a base extended by a security ring (6) connected to the skirt by divisible links (7). The security ring has a collar (8) connected to an inwards turned continuous stop band (11). The stop band is inclined in the direction of the top so as to be able to be engaged during mounting on the bottle neck (R) under a peripheral projection (S) on the neck. The collar checking band has a continuous upper end edge (5) defining a stop plane (P-P') orthogonal to the cap axis (x-x'). From place to place are zones (16) of small thickness defining several sectors (17). On each sector and on the internal face relative to the axis is a rib (20) with a stop (21) delimiting a polygonal passage whose inscribed circle is of diameter less than that of the larger neck. <IMAGE>

Description

La présente invention concerne les capsules de bouchage à vis utilisables de façon habituelle pour la fermeture étanche de récipients, tels que des bouteilles dont le goulot comporte des moyens de coopération complémentaires à la capsule pour permettre un montage et un démontage du type à vis.The present invention relates to screw closure capsules that can be used in the usual manner for the sealed closure of containers, such as bottles, the neck of which comprises means of cooperation complementary to the capsule to allow mounting and dismounting of the screw type.

L'objet de l'invention concerne plus particulièrement les capsules fabriquées par moulage, en matière plastique semi-rigide, et elle vise plus spécifiquement encore les capsules qui sont pourvues d'un témoin d'inviolabilité garantissant auprès de l'utilisateur que le récipient dans son intégrité n'a pas connu d'effraction avant la première ouverture effectuée par l'utilisateur.The object of the invention relates more particularly to capsules manufactured by molding, in semi-rigid plastic material, and it more specifically still targets capsules which are provided with a tamper-evident indicator guaranteeing to the user that the container in its integrity was not broken before the first opening made by the user.

Les capsules du type ci-dessus comprennent généralement un dessus bordé par une jupe sensiblement cylindrique, pourvue sur sa face interne d'un filet hélicoïdal destiné à coopérer avec un filet complémentaire du goulot.The capsules of the above type generally comprise a top bordered by a substantially cylindrical skirt, provided on its internal face with a helical thread intended to cooperate with a thread complementary to the neck.

La base de la jupe est prolongée par une bague d'inviolabilité qui est liée à la jupe par des ponts ou pontets de faible résistance mécanique à la traction.The base of the skirt is extended by a tamper-evident ring which is linked to the skirt by bridges or bridges of low mechanical tensile strength.

La bague d'inviolabilité comporte, à partir de sa base et en direction de la surface périphérique intérieure, une bande dite d'arrêt qui est destinée à venir s'arc-bouter sous une saillie du col du goulot du récipient dans la position de montage et de fermeture.The tamper-evident ring comprises, from its base and in the direction of the internal peripheral surface, a so-called stop strip which is intended to come to brace under a projection of the neck of the neck of the container in the position of mounting and closing.

Lors de la première ouverture par dévissage, la bande d'arrêt reste immobilisée par la saillie du col du récipient, ce qui provoque la rupture des ponts sécables permettant d'enlever la capsule tout en laissant la bague d'inviolabilité adaptée sur le col.During the first opening by unscrewing, the stop band remains immobilized by the projection of the neck of the container, which causes the breakable bridges to break allowing the capsule to be removed while leaving the suitable tamper-evident ring on the neck.

La technique antérieure a proposé de nombreuses réalisations pour fabriquer une telle capsule munie d'une bague d'inviolabilité. Il peut être considéré que la technique antérieure connaît deux grandes familles de bagues.The prior art has proposed numerous embodiments for manufacturing such a capsule provided with a tamper-evident ring. It can be considered that the prior art knows two main families of rings.

La première est réalisée pour comporter, en tant que bande d'arrêt, une pluralité de pétales repliés vers l'intérieur.The first is made to include, as a stop strip, a plurality of petals folded inwards.

La seconde est réalisée pour que la bande d'arrêt se présente de façon continue.The second is carried out so that the stop strip occurs continuously.

Il peut être escompté que les capsules de la seconde famille présentent une meilleure garantie de sécurité, étant donné que la bande continue est, par nature, moins sujette à un déroulement lors de l'ouverture par rapport aux pétales dont la plus faible section et la plus grande flexibilité laissent subsister un tel risque de dysfonctionnement lors de la première ouverture.It can be expected that the capsules of the second family have a better guarantee of security, given that the continuous strip is, by its nature, less subject to unwinding during opening compared to the petals, the smaller section and greater flexibility of which allow such a risk of malfunction to exist during first opening.

L'objet de l'invention vise plus particulièrement les capsules de la seconde famille qui peut être illustrée notamment par le brevet européen 0 200 293.The subject of the invention relates more particularly to capsules of the second family which can be illustrated in particular by European patent 0 200 293.

Pour fabriquer une capsule du type ci-dessus, il est nécessaire de réaliser le moulage de telle sorte que la bande d'arrêt continue se trouve infléchie de façon inclinée mais vers l'extérieur, de manière à permettre le démoulage. Pour réaliser une telle capsule, il est alors nécessaire de mettre en oeuvre des moules relativement complexes faisant intervenir des noyaux ou coulisseaux mobiles responsables de la formation de la bande continue et aptes à connaître au moins un effacement relatif permettant d'extraire la capsule fabriquée.To manufacture a capsule of the above type, it is necessary to carry out the molding so that the continuous stop strip is bent in an inclined manner but outwards, so as to allow demolding. To produce such a capsule, it is then necessary to use relatively complex molds involving movable cores or slides responsible for the formation of the continuous strip and capable of experiencing at least one relative erasure making it possible to extract the manufactured capsule.

Dans une seconde étape, il est alors nécessaire d'infléchir la bande continue vers l'intérieur de la capsule en procédant par exemple par roulage, de telle sorte qu'après le premier montage, elle soit à même d'agir par arc-boutement en venant se placer sous la saillie du goulot du col du récipient.In a second step, it is then necessary to bend the continuous strip towards the inside of the capsule, for example by rolling, so that after the first assembly, it is able to act by bracing coming from under the protrusion of the neck of the container neck.

On conçoit que les exigences ci-dessus conduisent à un coût de fabrication qui est élevé, en raison de la nécessité de mise en oeuvre d'un moule complexe et de l'existence d'une étape supplémentaire de reprise pour l'infléchissement interne de la bande devant être exécutée avec précision pour garantir la fiabilité du retournement ou inflexion de la bande d'arrêt continue.It is understood that the above requirements lead to a manufacturing cost which is high, due to the need to use a complex mold and the existence of an additional recovery step for the internal deflection of the strip must be executed with precision to guarantee the reliability of the reversal or inflection of the continuous stop strip.

Le coût est d'autant plus élevé encore que ces deux exigences de fabrication réduisent de manière sensible la possibilité de fabrication en grande série qui est un des facteurs permettant d'obtenir un faible coût de production.The cost is even higher since these two manufacturing requirements significantly reduce the possibility of mass production, which is one of the factors making it possible to obtain a low production cost.

L'objet de l'invention est justement de remédier aux inconvénients ci-dessus, en proposant une nouvelle capsule à vis et à ceinture ou témoin de violabilité de type continu et pouvant être fabriquée sans exiger une opération de reprise pour retourner ou infléchir vers l'intérieur la bande d'arrêt continue, comme cela est exigé par les moyens actuellement connus et mis en oeuvre.The object of the invention is precisely to remedy the above drawbacks, by proposing a new screw and belt capsule or indicator of violence of continuous type and which can be manufactured without requiring a recovery operation to return or bend towards the 'Inside the continuous stop band, as required by the means currently known and implemented.

Pour atteindre les objectifs ci-dessus, la capsule selon l'invention est caractérisée en ce que la bande d'arrêt de la bague

  • présente un bord extrême supérieur continu, définissant un plan de butée orthogonal à l'axe de la capsule,
  • comporte de place en place des zones de plus faible épaisseur définissant dans la bande une pluralité de secteurs,
  • est pourvue pour chaque secteur et sur sa face périphérique interne par rapport audit axe d'une nervure possédant une arête qui sous-tend ledit secteur, lesdites arêtes délimitant ensemble une section de passage polygonale dont le cercle inscrit est d'un diamètre inférieur à celui du plus grand cercle du goulot.
To achieve the above objectives, the capsule according to the invention is characterized in that the ring stop band
  • has a continuous upper end edge, defining a stop plane orthogonal to the axis of the capsule,
  • has thinner areas from place to place defining in the strip a plurality of sectors,
  • is provided for each sector and on its inner peripheral face with respect to said axis of a rib having an edge which underlies said sector, said edges together delimiting a polygonal passage section whose inscribed circle is of a diameter less than that of the largest circle of the neck.

Diverses autres caractéristiques ressortent de la description faite ci-dessous en référence aux dessins annexés qui montrent, à titre d'exemples non limitatifs, des formes de réalisation de l'objet de l'invention.Various other characteristics will emerge from the description given below with reference to the appended drawings which show, by way of nonlimiting examples, embodiments of the subject of the invention.

La figure 1 est une perspective d'une capsule conforme à l'invention.Figure 1 is a perspective of a capsule according to the invention.

La figure 2 est une demi-coupe demi-élevation, à plus petite échelle, de la capsule selon la figure 1.FIG. 2 is a half-elevation half-section, on a smaller scale, of the capsule according to FIG. 1 .

La figure 3 est une vue en plan prise selon la ligne III-III de la figure 2.Figure 3 is a plan view taken along line III-III of Figure 2 .

La figure 4 est une perspective, à plus grande échelle, de la ceinture d'inviolabilité séparée de la capsule pour faire apparaître plus précisément les caractéristiques constructives.Figure 4 is a perspective, on a larger scale, of the tamper-evident belt separated from the capsule to reveal more precisely the constructive characteristics.

La figure 5 est une coupe partielle prise, à plus grande échelle, selon la ligne V - V de la figure 3.FIG. 5 is a partial section taken, on a larger scale, along the line V - V of FIG. 3 .

La figure 6 est une coupe-élévation partielle illustrant une variante de réalisation de l'objet de l'invention.Figure 6 is a partial sectional elevation illustrating an alternative embodiment of the object of the invention.

Selon les figures 1 et 2, la capsule à vis conforme à l'invention comprend un dessus 1 bordé par une jupe 2 sensiblement circulaire, pourvue extérieurement de moyens 3 destinés à en faciliter la manipulation. Les moyens 3 peuvent être constitués, à titre d'exemple, par des cannelures ou analogues ménagées selon une direction axiale.According to Figures 1 and 2 , the screw cap according to the invention comprises a top 1 bordered by a substantially circular skirt 2 , provided externally with means 3 intended to facilitate handling. The means 3 can be constituted, by way of example, by grooves or the like formed in an axial direction.

La jupe 2 porte sur sa face périphérique interne des moyens 4 de montage par vissage et de démontage par dévissage sur le goulot ou col d'un récipient R qui comporte, de manière habituelle, des éléments de conformation complémentaires aux moyens 4. A titre d'exemple, les moyens 4 peuvent être constitués par un ou plusieurs filets hélicoïdaux continus ou discontinus.The skirt 2 carries on its internal peripheral face means 4 for mounting by screwing and disassembly by unscrewing on the neck or neck of a container R which usually comprises elements of conformation complementary to the means 4 . By way of example, the means 4 can consist of one or more continuous or discontinuous helical threads.

La face interne du dessus 1 peut être équipée d'une garniture d'étanchéité rapportée ou éventuellement être pourvue d'une lèvre circulaire 5 destinée à pénétrer à l'intérieur du col ou du goulot, pour assurer, seule ou en combinaison avec une garniture, la fonction d'étanchéité en position de fermeture de la capsule.The inner face of the top 1 can be fitted with an attached seal or optionally be provided with a circular lip 5 intended to penetrate inside the neck or the neck, to ensure, alone or in combination with a seal , the sealing function in the closed position of the capsule.

La capsule ci-dessus est réalisée par moulage en une seule opération à partir d'une matière première appropriée, notamment un polymère thermoplastique, de type polyoléfine par exemple.The above capsule is produced by molding in a single operation from an appropriate raw material, in particular a thermoplastic polymer, of the polyolefin type for example.

Selon une disposition connue, la base de la jupe 2 est prolongée par une bague d'inviolabilité 6, venue de moulage, qui est liée à la base de la jupe par des pontets ou ponts 7 sécables présentant une faible résistance mécanique à la traction.According to a known arrangement, the base of the skirt 2 is extended by a tamper-evident ring 6 , molded, which is linked to the base of the skirt by bridges or breakable bridges 7 having low mechanical tensile strength.

La bague d'inviolabilité 6 comprend une ceinture 8 dont la base 9 est prolongée, au-delà d'un pli de raccordement 10, par une bande d'arrêt 11 à caractère continu qui est infléchie de manière inclinée vers l'intérieur de la capsule et en direction du dessus 1.The tamper-evident ring 6 comprises a belt 8 , the base 9 of which is extended, beyond a connection ply 10 , by a stop strip 11 of continuous nature which is bent inclined inwardly of the capsule and towards the top 1 .

Selon l'invention, la bande 11 est réalisée pour comporter un bord extrême supérieur 15 continu définissant un plan de butée P - P' qui est orthogonal à l'axe x - x' de révolution de la jupe 2. Le bord extrême supérieur continu 15 est destiné à venir s'engager et s'arc-bouter sous la saillie périphérique S continue ou discontinue présentée extérieurement par le goulot ou le col du récipient R, lorsque la capsule 2 est montée sur ce dernier. Une telle coopération relève du domaine connu et pour cette raison, seule une représentation en traits mixtes apparaît à la figure 2.According to the invention, the strip 11 is produced to have a continuous upper end edge 15 defining an abutment plane P - P ' which is orthogonal to the axis x - x' of revolution of the skirt 2 . The continuous upper end edge 15 is intended to engage and brace under the continuous or discontinuous peripheral projection S presented externally by the neck or the neck of the container R , when the capsule 2 is mounted on the latter. Such cooperation is in the known field and for this reason, only a representation in dashed lines appears in Figure 2 .

La bande 11, au sens de l'invention, comporte par ailleurs de place en place des zones 16 de plus faible épaisseur, mais à caractère non sécable dont la présence a pour effet de délimiter dans la bande 11 une pluralité de secteurs 17 couvrant généralement une même plage angulaire. Chaque zone 16 est de préférence réalisée sous la forme d'un cran, de direction générale axiale, présentant une profondeur croissant en direction du bord 15, de manière à sensiblement affleurer ce dernier, tel que cela est illustré par les figures 1 et 4 plus particulièrement. De préférence, chaque cran 16 prend naissance sensiblement à partir du pli de raccordement 10, pour concerner toute la hauteur utile de la bande 11.The strip 11 , within the meaning of the invention also comprises from place to place zones 16 of thinner thickness, but of non-breakable nature, the presence of which has the effect of delimiting in the strip 11 a plurality of sectors 17 generally covering the same angular range. Each zone 16 is preferably made in the form of a notch, of axial general direction, having a depth increasing towards the edge 15 , so as to be substantially flush with the latter, as illustrated by Figures 1 and 4 more particularly. Preferably, each notch 16 originates substantially from the connection ply 10 , to relate to the entire useful height of the strip 11 .

Dans l'exemple montré par la figure 3, la bande 11 comporte six crans 16 qui délimitent entre eux dans la bande 11 six secteurs 17. Un tel exemple de réalisation n'est donné qu'à titre illustratif, car, selon les calibres ou les diamètres de capsules, il peut être envisagé de réduire ou d'augmenter le nombre de crans 16.In the example shown in FIG. 3 , the strip 11 has six notches 16 which delimit between them in the strip 11 six sectors 17 . Such an exemplary embodiment is given only by way of illustration, because, depending on the sizes or the diameters of capsules, it may be envisaged to reduce or increase the number of notches 16 .

Selon une autre caractéristique de l'invention, la bande 11 est réalisée par moulage, de manière que chaque secteur 17 soit pourvu, sur sa face périphérique interne par rapport à l'axe x - x', d'une nervure 20 en forme de lunule qui possède une arête 21 sous-tendant à la manière d'une corde le secteur 17. Chaque arête 21 est de préférence rectiligne et se trouve disposée dans un plan qui est compris entre le plan P - P' et le pli de raccordement 10.According to another characteristic of the invention, the strip 11 is produced by molding, so that each sector 17 is provided, on its internal peripheral face with respect to the axis x - x ' , of a rib 20 in the form of lunula which has an edge 21 subtending the sector 17 in the manner of a cord. Each edge 21 is preferably rectilinear and is arranged in a plane which is between the plane P - P ' and the connection ply 10 .

Les différentes nervures 20 définissent ainsi par leur arêtes 21 une section polygonale plus particulièrement illustrée par la figure 3 et dont le cercle inscrit C est d'un diamètre D qui est inférieur au plus grand diamètre du goulot ou du col du récipient.The different ribs 20 thus define by their edges 21 a polygonal section more particularly illustrated in FIG. 3 and whose inscribed circle C is of a diameter D which is less than the largest diameter of the neck or the neck of the container.

Selon une autre disposition, l'arête 21 de chaque nervure 20 est raccordée à la face intérieure du secteur 17 par une face 22 et au bord continu 15 par une face 23. Les figures 1, 2 et 4, mettent en évidence que la face 23 est courbe et réalisée de manière à affleurer dans sa partie médiane le bord 15.According to another arrangement, the edge 21 of each rib 20 is connected to the interior face of the sector 17 by a face 22 and to the continuous edge 15 by a face 23 . FIGS. 1 , 2 and 4 show that the face 23 is curved and made so as to be flush with the edge 15 in its middle part.

La réalisation de la bande 11 selon l'invention et telle que décrite ci-dessus a pour objectif de former une bande continue constituée de secteurs successifs à caractère relativement rigide et qui sont reliés entre eux par les zones 16 dont la plus faible épaisseur a deux fonctions.The production of the strip 11 according to the invention and as described above has the objective of forming a continuous strip made up of successive sectors of relatively rigid nature and which are interconnected by the zones 16 of which the smallest thickness has two functions.

La première des fonctions est d'admettre une capacité de contrainte de traction ou de compression qui permet de mouler la bande 11 dans la position originelle, telle qu'illustrée par les dessins, et de démouler la capsule obtenue par éjection et poussée axiale avec retournement flexible de la bande pour faciliter l'éjection par rapport au noyau du moule.The first function is to admit a tensile or compressive stress capacity which makes it possible to mold the strip 11 in the original position, as illustrated by the drawings, and to release the capsule obtained by ejection and axial thrust with turning. flexible strip to facilitate ejection from the mold core.

La seconde fonction est de conférer à la bande une sorte de mémoire de forme qui permet, après la contrainte d'étirement imposée lors de la phase de démoulage, de ramener automatiquement la bande 11 dans sa position infléchie vers l'intérieur qui est celle qui lui est conférée par nature pour coopérer avec la saillie du col, tel que cela est montré par la figure 2.The second function is to give the strip a kind of shape memory which, after the stretching constraint imposed during the demolding phase, automatically brings the strip 11 back into its inwardly bent position which is the one which is conferred on it by nature to cooperate with the projection of the neck, as shown in FIG. 2 .

Si la faculté d'absorber une contrainte de traction ou de compression lors du démoulage présente un intérêt pour faciliter la fabrication et supprimer l'opération de reprise et de roulage interne, tel que cela est connu, une telle faculté présente un deuxième intérêt lors du montage de la capsule pour la première fermeture du col.If the ability to absorb a tensile or compressive stress during demolding is of interest for facilitating manufacture and eliminating the recovery and internal rolling operation, as is known, such a faculty has a second interest during mounting of the capsule for the first closure of the neck.

En effet, étant donné que le cercle C est d'un diamètre D inférieur à celui du col, le premier bouchage implique d'exercer une contrainte axiale pour emboîter la capsule sur le col du récipient.Indeed, since the circle C is of a diameter D less than that of the neck, the first plugging involves exerting an axial stress to fit the capsule onto the neck of the container.

La présence des arêtes 21 réduit la friction ou le frottement au point de contact de chacune avec la périphérie du col et permet d'assurer, par contrainte axiale, un emboîtement de la capsule qui est facilité par la faculté de flexion de la bande 11 vers l'intérieur autorisée par la présence des crans 16.The presence of the edges 21 reduces the friction or the friction at the point of contact of each with the periphery of the neck and makes it possible to ensure, by axial constraint, an interlocking of the capsule which is facilitated by the bending ability of the strip 11 towards the interior authorized by the presence of the notches 16 .

Lorsque l'emboîtement est réalisé, la bande 11, par l'intermédiaire des crans 16, restitue le travail emmagasiné par la contrainte d'étirement subi, de sorte que par mémoire de forme, elle tend à réadopter sa position stable d'origine dans laquelle le bord 15 est ramené sous la saillie S du col du récipient, tel qu'illustré par la figure 2.When the nesting is carried out, the strip 11 , by means of the notches 16 , restores the work stored by the stretching stress undergone, so that by shape memory, it tends to readjust its original stable position in which the edge 15 is brought back under the projection S of the neck of the container, as illustrated in FIG. 2 .

Dans cette position, l'arc-boutement est certainement assuré par le bord continu interne 15 mais aussi par les faces 23 de chacune des nervures 20.In this position, the bracing is certainly ensured by the continuous internal edge 15 but also by the faces 23 of each of the ribs 20 .

La possibilité de fabriquer directement la bande d'arrêt 11 dans la position fonctionnelle qui est la sienne, permet de supprimer la phase ou la reprise de retournement habituel et par conséquent d'augmenter la cadence de fabrication, d'accroître le nombre d'empreintes pouvant être réalisées dans un moule en raison de l'absence des coulisseaux nécessaires au moulage des bandes à retournement classique et de pouvoir produire de la sorte des capsules de bouchage à un prix de revient inférieur à celui des capsules actuelles.The possibility of directly manufacturing the stop strip 11 in its functional position, makes it possible to eliminate the usual phase or resumption of turning and therefore to increase the production rate, to increase the number of impressions which can be produced in a mold due to the absence of the sliders necessary for molding the conventional turning bands and being able to produce closure caps in this way at a lower cost price than current capsules.

Les dispositions constructives mises en oeuvre permettent également d'obtenir une ceinture d'inviolabilité 6 présentant une grande sécurité de fonctionnement, tenant principalement à l'existence du bord continu 15 et à la présence des nervures 20 dont les faces supérieures 23 réalisent un arc-boutement ferme et résistant. La présence des nervures 20 s'oppose, par ailleurs, à tout risque de déroulement de la bande 11 sur le pli 10 lors du dévissage de la capsule, de sorte que par l'arc-boutement réalisé, une rupture efficace des pontets 7 intervient dès la première action de dévissage imposée à la capsule.The constructive measures implemented also make it possible to obtain a tamper-evident belt 6 having great operational safety, mainly due to the existence of the continuous edge 15 and to the presence of the ribs 20 , the upper faces 23 of which form a firm and resistant bracing. The presence of the ribs 20 opposes, moreover, any risk of unwinding of the strip 11 on the fold 10 during the unscrewing of the capsule, so that by the bracing carried out, an effective rupture of the bridges 7 occurs from the first unscrewing action imposed on the capsule.

De la sorte, un facteur essentiel de sécurité est fourni à l'utilisateur.In this way, an essential safety factor is provided to the user.

Un autre avantage tient également au fait que les nervures 20, en raison de la présence des arêtes 21 et des faces 22, qui respectivement limitent le contact de surface et constituent des sortes de rampes d'engagement, permettent d'assurer un montage de la capsule de manière automatique sans mettre en oeuvre des moyens à même de développer une forte poussée axiale exigeant une consommation d'énergie non négligeable.Another advantage is also due to the fact that the ribs 20 , due to the presence of the edges 21 and the faces 22 , which respectively limit the surface contact and constitute sorts of engagement ramps, make it possible to assemble the capsule automatically without using means capable of developing a strong axial thrust requiring significant energy consumption.

Dans ce but, il peut être prévu, selon une variante de réalisation illustrée par la figure 6, de faire venir, lors du moulage, pour chaque nervure 20 une rampe inclinée 25 joignant sensiblement le pli 10 à l'arête 21, en constituant une sorte de saillie présentée localement par la face 22.For this purpose, it can be provided, according to an alternative embodiment illustrated in Figure 6 , to bring, during molding, for each rib 20 an inclined ramp 25 substantially joining the fold 10 to the edge 21 , constituting a sort of projection presented locally by the face 22 .

De cette manière, l'engagement lors d'un premier montage est facilité par la définition d'une sorte de cône d'introduction et de glissement matérialisé par les différentes rampes 25 sur lesquelles le buvant du col ou du goulot vient initialement prendre appui.In this way, the engagement during a first assembly is facilitated by the definition of a sort of introduction and sliding cone materialized by the various ramps 25 on which the drinker of the neck or the neck is initially supported.

L'invention n'est pas limitée aux exemples décrits et représentés car diverses modifications peuvent y être apportées sans sortir de son cadre.The invention is not limited to the examples described and shown since various modifications can be made thereto without departing from its scope.

Claims (7)

1 - Capsule à vis pour le bouchage du goulot d'un récipient, du type comprenant un dessus (1), une jupe (2) sensiblement cylindrique pourvue sur sa face interne, d'un filet hélicoïdal (4) et dont la base est prolongée par une ceinture (6) témoin de violabilité, liée à la jupe par des ponts sécables (7), ladite ceinture comportant une bague (8) associée à une bande d'arrêt (11) continue retournée vers l'intérieur en présentant une inclinaison montante en direction du dessus, de manière à pouvoir être engagée, lors d'un premier montage sur le goulot (R), sous une saillie (S) périphérique présentée par ce dernier,
   caractérisée en ce que la bande d'arrêt (11) de la bague (8) - présente un bord extrême supérieur (15) continu, définissant un plan de butée (P - P') orthogonal à l'axe (x - x') de la capsule, - comporte de place en place des zones (16) de plus faible épaisseur définissant dans la bande une pluralité de secteurs (17), - est pourvue, pour chaque secteur et sur sa face périphérique interne par rapport audit axe, d'une nervure (20) possédant une arête (21) qui sous-tend ledit secteur, lesdites arêtes délimitant ensemble une section de passage polygonale dont le cercle inscrit (C) est d'un diamètre (D) inférieur à celui du plus grand cercle du goulot. 1 - Screw cap for plugging the neck of a container, of the type comprising a top (1) , a substantially cylindrical skirt (2) provided on its internal face, with a helical thread (4) and the base of which is extended by a belt (6) indicating violence, linked to the skirt by breakable bridges (7) , said belt comprising a ring (8) associated with a continuous stop band (11) turned inwardly presenting a inclination rising towards the top, so that it can be engaged, during a first assembly on the neck (R) , under a peripheral projection (S) presented by the latter,
characterized in that the stop band (11) of the ring (8) - has a continuous upper end edge (15) , defining an abutment plane (P - P ') orthogonal to the axis (x - x') of the capsule, - has from place to place zones (16) of smaller thickness defining in the strip a plurality of sectors (17) , - is provided, for each sector and on its internal peripheral face with respect to said axis, of a rib (20) having an edge (21) which underlies said sector, said edges together delimiting a polygonal passage section whose circle inscribed (C) is of a diameter (D) smaller than that of the largest circle of the neck. 2 - Capsule à vis selon la revendication 1, caractérisée en ce que les zones de moindre épaisseur (16) sont constituées par des crans de direction générale axiale présentant une profondeur croissant depuis la base en direction du bord supérieur. 2 - screw cap according to claim 1 , characterized in that the zones of reduced thickness (16) are constituted by notches of generally axial direction having an increasing depth from the base towards the upper edge. 3 - Capsule à vis selon la revendication 2, caractérisée en ce que chaque cran prend naissance à partir d'un pli (10) de raccordement entre la bande d'arrêt (11) et la bague (8). 3 - screw cap according to claim 2 , characterized in that each notch originates from a fold (10) of connection between the stop band (11) and the ring (8) . 4 - Capsule à vis selon la revendication 1, caractérisée en ce que la nervure (20) de chaque secteur présente une forme sensiblement en lunule et comporte une arête extrême (21) dont la partie centrale est située dans le plan de butée orthogonal (P-P'). 4 - screw cap according to claim 1 , characterized in that the rib (20) of each sector has a shape substantially in lunula and comprises an extreme edge (21) whose central part is located in the plane of orthogonal stop (P -P ') . 5 - Capsule à vis selon la revendication 1 ou 4, caractérisée en ce que chaque nervure (20) est raccordée à la surface périphérique interne du secteur par une face supérieure (23) courbe dont le sommet affleure le bord supérieur du segment. 5 - Screw cap according to claim 1 or 4 , characterized in that each rib (20) is connected to the internal peripheral surface of the sector by a curved upper face (23) whose apex is flush with the upper edge of the segment. 6 - Capsule à vis selon la revendication 1, 4 ou 5, caractérisée en ce que chaque nervure (20) est raccordée au pli par une face plane inclinée (22). 6 - screw cap according to claim 1 , 4 or 5 , characterized in that each rib (20) is connected to the fold by a flat inclined face (22) . 7 - Capsule à vis selon la revendication 6, caractérisée en ce que la face plane inclinée (22) est pourvue d'au moins une saillie (25) définissant une rampe inclinée raccordant le pli à l'arête. 7 - screw cap according to claim 6 , characterized in that the inclined flat face (22) is provided with at least one projection (25) defining an inclined ramp connecting the fold to the edge.
EP95420088A 1994-04-15 1995-04-07 Screw cap for the sealing of the neck of a container Expired - Lifetime EP0677451B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9404821A FR2718714B1 (en) 1994-04-15 1994-04-15 Screw cap for plugging the neck of a container.
FR9404821 1994-04-15

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EP0677451A1 true EP0677451A1 (en) 1995-10-18
EP0677451B1 EP0677451B1 (en) 1998-02-11

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US (1) US5678714A (en)
EP (1) EP0677451B1 (en)
AT (1) ATE163164T1 (en)
AU (1) AU682574B2 (en)
CA (1) CA2147092C (en)
DE (1) DE69501598T2 (en)
DK (1) DK0677451T3 (en)
ES (1) ES2114285T3 (en)
FR (1) FR2718714B1 (en)
GR (1) GR3026706T3 (en)
HU (1) HU214643B (en)
PL (1) PL176164B1 (en)

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WO2000034141A1 (en) * 1998-12-04 2000-06-15 Specialised Packaging Concepts Pty. Ltd. Reversible tamper evident cap and container

Also Published As

Publication number Publication date
DE69501598T2 (en) 1998-07-16
CA2147092C (en) 1999-05-11
HU214643B (en) 1998-04-28
HUT72706A (en) 1996-05-28
HU9501081D0 (en) 1995-06-28
ATE163164T1 (en) 1998-02-15
FR2718714A1 (en) 1995-10-20
AU1648795A (en) 1995-10-26
PL176164B1 (en) 1999-04-30
GR3026706T3 (en) 1998-07-31
CA2147092A1 (en) 1995-10-16
ES2114285T3 (en) 1998-05-16
US5678714A (en) 1997-10-21
FR2718714B1 (en) 1996-07-19
AU682574B2 (en) 1997-10-09
DE69501598D1 (en) 1998-03-19
PL308165A1 (en) 1995-10-16
DK0677451T3 (en) 1998-09-23
EP0677451B1 (en) 1998-02-11

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