EP0107680B1 - Plastic threaded closure cap, with improved tamper-proof strip - Google Patents

Plastic threaded closure cap, with improved tamper-proof strip Download PDF

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Publication number
EP0107680B1
EP0107680B1 EP83901205A EP83901205A EP0107680B1 EP 0107680 B1 EP0107680 B1 EP 0107680B1 EP 83901205 A EP83901205 A EP 83901205A EP 83901205 A EP83901205 A EP 83901205A EP 0107680 B1 EP0107680 B1 EP 0107680B1
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EP
European Patent Office
Prior art keywords
skirt
cap
proof strip
tamper
sealing means
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83901205A
Other languages
German (de)
French (fr)
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EP0107680A1 (en
Inventor
Francis Couput
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.)
Pechiney Emballage Alimentaire
Original Assignee
Cebal SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority claimed from FR8207467A external-priority patent/FR2525565B1/en
Priority claimed from FR8304093A external-priority patent/FR2542285B2/en
Application filed by Cebal SAS filed Critical Cebal SAS
Publication of EP0107680A1 publication Critical patent/EP0107680A1/en
Application granted granted Critical
Publication of EP0107680B1 publication Critical patent/EP0107680B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
    • B65D41/0407—Threaded or like caps or cap-like covers secured by rotation with integral sealing means
    • B65D41/0428—Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a collar, flange, rib or the like contacting the top rim or the top edges or the external surface of a container neck
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
    • B65D41/0407—Threaded or like caps or cap-like covers secured by rotation with integral sealing means
    • B65D41/0414—Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a plug, collar, flange, rib or the like contacting the internal surface of a container neck
    • 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 invention relates to a plastic screw cap closure with an improved tamper-evident band. It relates to the technical field of packaging elements.
  • Numerous screw closure devices comprising a security means intended to control access to the content of the container closed by such devices, and to avoid, in particular, fraudulent operations on this content.
  • these corking devices which are mounted on bottles whose rings are of the type standardized almost universally and known under the name of "Pilferproof" comprise a screw cap, possibly provided with a seal. , and an annular security strip separably connected to the lower part of the capsule skirt. Any attempt to unscrew the capsule must cause the safety strip to separate.
  • these tamper-evident capsules were made of metal, in particular aluminum, and after screwing on the capsule, the safety band was crimped onto the neck by a simple mechanical device.
  • thermoplastic polymers which are no longer suitable for simple crimping because of their natural elasticity.
  • the tamper-evident band comprises two parts, a first annular part connected to the lower part of the skirt of the capsule by breakable bridges, and a second part constituted by a plurality of tongues connected to the first part by zones forming a joint, each tongue having one end forming a heel which abuts on a projection on the neck like the edge of the tamper-evident band described by the previous document.
  • the present invention constitutes another solution to this problem, with an improved tamper-evident band which ensures both easy positioning of the capsule and a frank and safer separation of the tamper-evident band during the first unscrewing.
  • the screw closure cap of the invention comprises (fig. 1) a head 1 and a skirt 2 provided with an internal thread 3 which cooperates with the thread of the container to be capped.
  • the tamper-evident band 4 is attached to the lower part of the skirt 2 by a plurality of bridges 5 which constitute the breaking points during the subsequent unscrewing.
  • the tamper-evident band 4 comprises a continuous annular upper part 4A and a lower part constituted by a plurality of tabs such as 6 connected to the upper part 4A by a thinned part 7 which constitutes a kind of articulation.
  • the tongues 6 also have a heel 8 and a thinned extension 9.
  • the tongues 6 are molded in the position of FIG. 1, that is to say turned upwards. During the demolding, they turn over and come in vertical position according to fig. 2. When demolding is finished, their own elasticity brings them back to the position of fig. 1, after pivoting around the thinned area 7 which acts as a hinge. They thus form an acute angle with the annular part 4 and are turned towards the inside of the capsule.
  • the tongues 6 When the capsule is screwed onto the glass ring 10 (fig. 3 and 4), the tongues 6 are forced by the buttock 11 of the neck to fold against the band 4 and, at the end of the screwing, the heels 8 exceed the rim 12 of the counter ring 11 (fig. 3).
  • the elastic memory of the tongues 6 then presses them onto the counter-ring 11 in a position such that any attempt at unscrewing brings the heels 8 into abutment under the rim 12 of the counter-ring 11.
  • the thinned end portion of the tongue 6 being wedged between the strip 4A and the counter ring 11, the heels 8 cannot disengage downwards, and the breaking of the bridges 5 is then inevitable, which leaves visible proof of this first opening of the capsule.
  • This plastic screw cap closure with improved tamper-evident band comprises, with this tamper-evident device, sealing means which, separately or in combination, constitute advantageous improvements of the capsule.
  • a first sealing means is an inner cover 13 in the form of an inclined peripheral lip (FIG. 3) whose outer surface is applied to the inside of the rounded end of the neck of the bottle during corking. by screwing on the capsule.
  • a second sealing means (FIGS. 5 and 6) is particularly effective; it seals the inside of the neck a little lower than its orifice thanks to a cap 14 connected to the head 1, this cap 14 being formed. of a central chimney in the form of a skirt 15 flanked by a peripheral lateral lip 16.
  • the outside diameter of the body of the central chimney in the form of a skirt 15 is slightly smaller than the minimum diameter provided for the interior 17 of the neck , the terms minimum and maximum being understood as the limits generally accepted for the internal diameter 17 due to the variations inherent in the industrial processes for manufacturing bottles.
  • the outer diameter of the peripheral lateral lip 16 is a little larger than the maximum diameter provided for the interior 17, so that the end of this lip 16 comes first to abut on the upper end of the neck when screw on the capsule.
  • the chimney 15 has an external diameter of 16.3 mm and its lip device 16 has an outside diameter of 19.5 mm.
  • the internal pressure tends to apply more the lower end 18 of the chimney against the internal wall of the neck, and the end of the peripheral lateral lip 16 continues to produce a second sealing, its application against the wall being due to its tilting and its elasticity.
  • the lip 16 at rest is preferably directed downwards (fig. 5), so as to accentuate this tilting effect and elastic support.
  • a third sealing means (fig. 7) provides sealing on the area of the external surface of the neck between the rounded end of this neck and the start of the threading.
  • a peripheral lip 19 connected to the skirt 2 of the capsule above its thread extends inwards so that it comes to apply fairly strongly on the external wall of the neck, in the zone between the 'rounded end and thread, area with fairly tight diameter tolerances, when the cap is screwed on.
  • the end of the lip 19 comes to bear against the external wall of the neck and turns upwards while being applied in an elastic manner.
  • the peripheral lip 19 at rest is preferably oriented downwards so as to increase this elastic effect or spring effect.
  • the screw closure cap of the invention provided with sealing means and in particular with any one of the three means specified above or with any combination of these means, is easy to produce by molding.
  • a thermoplastic polymer such as polypropylene. Its tamper-evident device offers total security and adapts perfectly to all automatic bottling and capping chains.
  • the capsule of the invention adapts to the containers without harming their aesthetics.

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

Abstract

Plastic threaded closure cap, with tamper-proof strip, intended to containers provided with a "Pilferproof" type ring having a threading which crowns a counter ring of which the lower portion forms a flange, said cap comprising a head, a skirt provided with an inner threading and a tamper-proof strip connected to the lower portion of the skirt by a plurality of bridges forming sectile bonds. The tamper-proof strip comprises two parts, a first annular part (4A) connected to the lower part of the skirt (2) by the sectile bridges (5) and a second part comprised of a plurality of tongues (6) connected to the first part (4A) by thinner areas (7) forming a hinge, each tongue having a bead (8) and a thinner extension (9). The tongues (6) form, together with the annular part (4A) a sharp angle with its apex on the thinner areas (7) and are turned towards the inside of the cap. Sealing means are also disclosed.

Description

L'invention concerne une capsule de bouchage à vis, en plastique, à bande d'inviolabilité perfectionnée. Elle se rattache au domaine technique des éléments d'emballage.The invention relates to a plastic screw cap closure with an improved tamper-evident band. It relates to the technical field of packaging elements.

On connaît de nombreux dispositifs de bouchage à vis comportant un moyen de sécurité destiné à contrôler l'accès au contenu du récipient fermé par de tels dispositifs, et à éviter, en particulier, des manoeuvres frauduleuses sur ce contenu.Numerous screw closure devices are known comprising a security means intended to control access to the content of the container closed by such devices, and to avoid, in particular, fraudulent operations on this content.

De façon générale, ces dispositifs de bouchage qui se montent sur des bouteilles dont les bagues sont du type normalisé de façon quasi-universelle et connu sous le nom de «Pilferproof» comportent une capsule à vis, éventuellement munie d'un joint d'étanchéité, et une bande de sécurité annulaire reliée de façon séparable à la partie inférieure de la jupe de la capsule. Toute tentative de dévissage de la capsule doit provoquer la séparation de la bande de sécurité.In general, these corking devices which are mounted on bottles whose rings are of the type standardized almost universally and known under the name of "Pilferproof" comprise a screw cap, possibly provided with a seal. , and an annular security strip separably connected to the lower part of the capsule skirt. Any attempt to unscrew the capsule must cause the safety strip to separate.

A l'origine, ces capsules inviolables étaient réalisées en métal, notamment en aluminium et après vissage de la capsule, la bande de sécurité était sertie sur le goulot par un dispositif mécanique simple.Originally, these tamper-evident capsules were made of metal, in particular aluminum, and after screwing on the capsule, the safety band was crimped onto the neck by a simple mechanical device.

A l'heure actuelle, on tend à substituer à l'aluminium des polymères thermoplastiques qui ne se prêtent plus à un sertissage simple en raison de leur élasticité naturelle.At present, there is a tendency to replace aluminum with thermoplastic polymers which are no longer suitable for simple crimping because of their natural elasticity.

On a donc imaginé un certain nombre de solutions pour assurer un sertissage de la bande d'inviolabilité.A number of solutions have therefore been devised to ensure crimping of the tamper-evident band.

Dans les brevets français N°s 2282378 et 2467790, on procède à une thermorétraction de la bande d'inviolabilité sous l'action d'un jet d'air chaud.In French Patents Nos 2282378 and 2467790, one proceeds to a shrinking of the tamper-evident band under the action of a hot air jet.

Cette solution implique l'adjonction d'une étape supplémentaire sur les chaînes d'embouteillage et de capsulage, et présente le risque de fusion totale des bouchons lorsque la chaîne vient à s'arrêter, ce qui oblige à prévoir un dispositif de sécurité. En outre, l'aspect de la bande rétractée laisse souvent à désirer.This solution involves the addition of an additional step on the bottling and capping chains, and presents the risk of total cork melting when the chain comes to a stop, which means that a safety device must be provided. In addition, the appearance of the retracted band often leaves something to be desired.

Dans le brevet français N° 2439140, la bande d'inviolabilité se replie vers l'intérieur de la capsule lorsqu'on la visse sur le goulot d'un flacon de façon telle que son rebord supérieur vient en butée sur une saillie du goulot. Lors du dévissage, la bande ainsi bloquée ne peut pas remonter et se sépare de la jupe. Mais il y a un risque que la bande se retire sans se séparer. Dans la demande de brevet EP-A N° 49876, la bande d'inviolabilité comporte deux parties, une première partie annulaire reliée à la partie inférieure de la jupe de la capsule par des ponts sécables, et une deuxième partie constituée par une pluralité de languettes reliées à la première partie par des zones formant articulation, chaque languette comportant une extrémité formant talon qui vient en butée sur une saillie du goulot comme le rebord de la bande d'inviolabilité décrite par le document précédent.In French Patent No. 2439140, the tamper-evident band folds inwardly of the capsule when it is screwed onto the neck of a bottle so that its upper rim abuts on a projection on the neck. When unscrewing, the band thus blocked cannot go back up and separates from the skirt. But there is a risk that the strip will withdraw without separating. In patent application EP-A No. 49876, the tamper-evident band comprises two parts, a first annular part connected to the lower part of the skirt of the capsule by breakable bridges, and a second part constituted by a plurality of tongues connected to the first part by zones forming a joint, each tongue having one end forming a heel which abuts on a projection on the neck like the edge of the tamper-evident band described by the previous document.

La présente invention constitue une autre solution de ce problème, avec une bande d'inviolabilité perfectionnée qui assure à la fois une mise en place facile de la capsule et une séparation franche et plus sûre de la bande d'inviolabilité lors du premier dévissage.The present invention constitutes another solution to this problem, with an improved tamper-evident band which ensures both easy positioning of the capsule and a frank and safer separation of the tamper-evident band during the first unscrewing.

Des moyens d'étanchéité particuliers de la capsule sont proposés en liaison avec la bande d'inviolabilité de l'invention.Special sealing means for the capsule are proposed in conjunction with the tamper-evident band of the invention.

La capsule de bouchage à vis de l'invention, en plastique et à bande d'inviolabilité, destinée à des récipients munis d'une bague comportant un filetage surmontant une contrebague dont la partie inférieure forme un rebord, comporte comme il est connu une tête, une jupe munie d'un filetage interne, et une bande d'inviolabilité reliée à la partie inférieure de la jupe par une pluralité de ponts constituant des liaisons sécables, la bande d'inviolabilité comportant elle-même deux parties, une première partie annulaire reliée à la partie inférieure de la jupe de la capsule par des ponts sécables, et une deuxième partie constituée par une pluralité de languettes reliées à la première partie par des articulations, chaque languette comportant un talon disposé de manière à dépasser le rebord de la contrebague avec lequel il forme butée après que la languette a été repliée intérieurement contre ou vers la première partie annulaire lors du vissage. De façon particulière à l'invention, les articulations des languettes sont formées par des zones amincies et chaque languette présente au-delà du talon un prolongement aminci prévu pour venir se coincer après vissage entre la première partie annulaire et la contrebague.

  • Les fig. 1 à 4 représentent en coupe (fig. 1 et 2) ou en vue partiellement coupée (fig. 3 et 4) un exemple de capsule, objet de l'invention.
  • La fig. 3 représente aussi un premier moyen d'étanchéité de la capsule de l'invention.
  • Les fig. 5 et 6 représentent en demi-coupe axiale un deuxième moyen d'étanchéité.
  • La fig. 7 représente en demi-coupe axiale un troisième moyen d'étanchéité.
The screw closure cap of the invention, made of plastic and with a tamper-evident band, intended for containers provided with a ring having a thread surmounting a counter ring whose lower part forms a rim, comprises, as is known, a head , a skirt provided with an internal thread, and a tamper-evident band connected to the lower part of the skirt by a plurality of bridges constituting breakable connections, the tamper-evident band itself comprising two parts, a first annular part connected to the lower part of the skirt of the capsule by breakable bridges, and a second part constituted by a plurality of tongues connected to the first part by articulations, each tongue having a heel arranged so as to exceed the rim of the counter ring with which it forms a stop after the tongue has been internally folded against or towards the first annular part during screwing. Particularly to the invention, the articulations of the tongues are formed by thinned zones and each tongue has, beyond the heel, a thinned extension intended to come to be jammed after screwing between the first annular part and the counter ring.
  • Figs. 1 to 4 show in section (fig. 1 and 2) or in partially cut view (fig. 3 and 4) an example of capsule, object of the invention.
  • Fig. 3 also shows a first means of sealing the capsule of the invention.
  • Figs. 5 and 6 show in axial half-section a second sealing means.
  • Fig. 7 shows in axial half-section a third sealing means.

La capsule de bouchage à vis de l'invention comporte (fig. 1) une tête 1 et une jupe 2 munie d'un filetage interne 3 qui coopère avec le filetage du récipient à boucher. A la partie inférieure de la jupe 2 se rattache la bande d'inviolabilité 4 par une pluralité de ponts 5 qui constituent les points de rupture lors du dévissage ultérieur. La bande d'inviolabilité 4 comporte une partie supérieure annulaire continue 4A et une partie inférieure constituée par une pluralité de languettes telles que 6 reliées à la partie supérieure 4A par une partie amincie 7 qui constitue une sorte d'articulation. Les languettes 6 comportent en outre un talon 8 et un prolongement aminci 9.The screw closure cap of the invention comprises (fig. 1) a head 1 and a skirt 2 provided with an internal thread 3 which cooperates with the thread of the container to be capped. The tamper-evident band 4 is attached to the lower part of the skirt 2 by a plurality of bridges 5 which constitute the breaking points during the subsequent unscrewing. The tamper-evident band 4 comprises a continuous annular upper part 4A and a lower part constituted by a plurality of tabs such as 6 connected to the upper part 4A by a thinned part 7 which constitutes a kind of articulation. The tongues 6 also have a heel 8 and a thinned extension 9.

Les languettes 6 sont moulées dans la position de la fig. 1, c'est-à-dire retournées vers le haut. Pendant le démoulage, elles se retournent et viennent en position verticale selon la fig. 2. Une fois le démoulage terminé, leur élasticité propre les ramène dans la position de la fig. 1, après pivotement autour de la zone amincie 7 qui agit comme charnière. Elles forment ainsi un angle aigu avec la partie annulaire 4 et sont tournées vers l'intérieur de la capsule.The tongues 6 are molded in the position of FIG. 1, that is to say turned upwards. During the demolding, they turn over and come in vertical position according to fig. 2. When demolding is finished, their own elasticity brings them back to the position of fig. 1, after pivoting around the thinned area 7 which acts as a hinge. They thus form an acute angle with the annular part 4 and are turned towards the inside of the capsule.

Lors du vissage de la capsule sur la bague de verrerie 10 (fig. 3 et 4), les languettes 6 sont obligées par la contrebague 11 du goulot de se replier contre la bande 4 et, en fin de vissage, les talons 8 dépassent le rebord 12 de la contrebague 11 (fig. 3). La mémoire élastique des languettes 6 les plaque alors sur la contrebague 11 dans une position telle que toute tentative de dévissage amène les talons 8 en butée sous le rebord 12 de la contrebague 11. La partie terminale amincie de la languette 6 étant coincée entre la bande 4A et la contrebague 11, les talons 8 ne peuvent pas se dégager vers le bas, et la rupture des ponts 5 est alors inévitable, ce qui laisse la preuve visible de cette première ouverture de la capsule.When the capsule is screwed onto the glass ring 10 (fig. 3 and 4), the tongues 6 are forced by the buttock 11 of the neck to fold against the band 4 and, at the end of the screwing, the heels 8 exceed the rim 12 of the counter ring 11 (fig. 3). The elastic memory of the tongues 6 then presses them onto the counter-ring 11 in a position such that any attempt at unscrewing brings the heels 8 into abutment under the rim 12 of the counter-ring 11. The thinned end portion of the tongue 6 being wedged between the strip 4A and the counter ring 11, the heels 8 cannot disengage downwards, and the breaking of the bridges 5 is then inevitable, which leaves visible proof of this first opening of the capsule.

Cette capsule de bouchage à vis en plastique à bande d'inviolabilité perfectionnée comporte, avec ce dispositif d'inviolabilité, des moyens d'étanchéité qui, de façon distincte ou en association, constituent des améliorations intéressantes de la capsule.This plastic screw cap closure with improved tamper-evident band comprises, with this tamper-evident device, sealing means which, separately or in combination, constitute advantageous improvements of the capsule.

Un premier moyen d'étanchéité est un opercule intérieur 13 en forme de lèvre périphérique inclinée (fig. 3) dont la surface extérieure vient s'appliquer sur l'intérieur de l'arrondi de l'extrémité du goulot de la bouteille lors du bouchage par vissage de la capsule.A first sealing means is an inner cover 13 in the form of an inclined peripheral lip (FIG. 3) whose outer surface is applied to the inside of the rounded end of the neck of the bottle during corking. by screwing on the capsule.

Un deuxième moyen d'étanchéité (fig. 5 et 6) est particulièrement efficace il réalise l'étanchéité à l'intérieur du goulot un peu plus bas que son orifice grâce à un opercule 14 raccordé à la tête 1, cet opercule 14 étant formé d'une cheminée centrale en forme de jupe 15 flanquée d'une lèvre latérale périphérique 16. Le diamètre extérieur du corps de la cheminée centrale en forme de jupe 15 est un peu plus faible que le diamètre minimal prévu pour l'intérieur 17 du goulot, les termes de minimal et de maximal s'entendant des limites généralement admises pour le diamètre intérieur 17 du fait des variations inhérentes aux procédés industriels de fabrication des bouteilles. Le diamètre extérieur de la lèvre latérale périphérique 16 est un peu plus grand que le diamètre maximal prévu pour l'intérieur 17, de façon que l'extrémité de cette lèvre 16 vienne d'abord buter sur l'extrémité supérieure du goulot lorsqu'on visse la capsule.A second sealing means (FIGS. 5 and 6) is particularly effective; it seals the inside of the neck a little lower than its orifice thanks to a cap 14 connected to the head 1, this cap 14 being formed. of a central chimney in the form of a skirt 15 flanked by a peripheral lateral lip 16. The outside diameter of the body of the central chimney in the form of a skirt 15 is slightly smaller than the minimum diameter provided for the interior 17 of the neck , the terms minimum and maximum being understood as the limits generally accepted for the internal diameter 17 due to the variations inherent in the industrial processes for manufacturing bottles. The outer diameter of the peripheral lateral lip 16 is a little larger than the maximum diameter provided for the interior 17, so that the end of this lip 16 comes first to abut on the upper end of the neck when screw on the capsule.

A titre d'exemple et pour fixer les idées, dans le cas d'un goulot de diamètre intérieur 17 compris dans la pratique industrielle entre 16,7 et 19 mm, la cheminée 15 a un diamètre extérieur de 16,3 mm et sa lèvre périphérique 16 a un diamètre extérieur de 19,5 mm.By way of example and to fix ideas, in the case of a neck with an internal diameter 17 included in industrial practice between 16.7 and 19 mm, the chimney 15 has an external diameter of 16.3 mm and its lip device 16 has an outside diameter of 19.5 mm.

Lors du vissage de la capsule, la partie inférieure 18 de la cheminée pénètre avec un léger jeu jusqu'à ce que la lèvre latérale périphérique 16 vienne buter sur le rebord du goulot (fig. 5), puis lorsqu'on poursuit le vissage, la lèvre périphérique pénètre dans le goulot en basculant vers le haut (fig. 6), ce basculement entraînant un évasement de la partie inférieure 18 de la cheminée en forme de jupe 15, cette partie inférieure 18 venant alors s'appliquer plus bas sur la surface interne du goulot. On obtient ainsi une double étanchéité par les extrémités des lèvres 18 et 15. Comme on peut le voir sur la fig. 6, cet effet de basculement et d'évasement se traduit dans chaque section axiale de l'opercule par un pivotement et une flexion schématisés par la flèche. Dans le cas d'un récipient contenant un liquide sous pression, la pression interne tend à appliquer davantage l'extrémité inférieure 18 de la cheminée contre la paroi interne du goulot, et l'extrémité de la lèvre latérale périphérique 16 continue à réaliser une deuxième étanchéité, son application contre la paroi étant due à son basculement et à son élasticité. La lèvre 16 au repos est de préférence dirigée vers le bas (fig. 5), de façon à accentuer cet effet de basculement et d'appui élastique.When the capsule is screwed on, the lower part 18 of the chimney penetrates with a slight clearance until the peripheral lateral lip 16 abuts on the edge of the neck (fig. 5), then when the screwing is continued, the peripheral lip enters the neck by tilting upwards (fig. 6), this tilting causing flaring of the lower part 18 of the skirt-shaped chimney 15, this lower part 18 then being applied lower on the internal surface of the neck. A double seal is thus obtained by the ends of the lips 18 and 15. As can be seen in FIG. 6, this tilting and flaring effect is reflected in each axial section of the cover by a pivoting and bending diagrammed by the arrow. In the case of a container containing a liquid under pressure, the internal pressure tends to apply more the lower end 18 of the chimney against the internal wall of the neck, and the end of the peripheral lateral lip 16 continues to produce a second sealing, its application against the wall being due to its tilting and its elasticity. The lip 16 at rest is preferably directed downwards (fig. 5), so as to accentuate this tilting effect and elastic support.

Un troisième moyen d'étanchéité (fig. 7) réalise l'étanchéité sur la zone de la surface extérieure du goulot comprise entre l'arrondi d'extrémité de ce goulot et le début du filetage. Une lèvre périphérique 19 raccordée à la jupe 2 de la capsule au-dessus de son filetage s'étend vers l'intérieur de façon telle qu'elle vienne s'appliquer assez fortement sur la paroi externe du goulot, dans la zone comprise entre l'arrondi d'extrémité et le filetage, zone dont les tolérances de diamètre sont assez étroites, lorsque la capsule est vissée. Quand on visse la capsule, l'extrémité de la lèvre 19 vient porter contre la paroi externe du goulot et se retourne vers le haut en s'appliquant de façon élastique. La lèvre périphérique 19 au repos est orientée de préférence vers le bas de façon à augmenter cet effet élastique ou effet ressort. L'intérêt de la localisation de cette lèvre périphérique constituant le troisième moyen d'étanchéité est la bonne reproducti- bilité de la qualité de l'étanchéité obtenue liée aux tolérances de diamètre étroites de la zone d'application.A third sealing means (fig. 7) provides sealing on the area of the external surface of the neck between the rounded end of this neck and the start of the threading. A peripheral lip 19 connected to the skirt 2 of the capsule above its thread extends inwards so that it comes to apply fairly strongly on the external wall of the neck, in the zone between the 'rounded end and thread, area with fairly tight diameter tolerances, when the cap is screwed on. When the capsule is screwed on, the end of the lip 19 comes to bear against the external wall of the neck and turns upwards while being applied in an elastic manner. The peripheral lip 19 at rest is preferably oriented downwards so as to increase this elastic effect or spring effect. The advantage of the location of said peripheral lip forming the third sealing means is good reproducibility - bility of the quality of the seal obtained related to the narrow diameter tolerances of the application area.

La capsule de bouchage à vis de l'invention, munie de moyens d'étanchéité et en particulier de l'un quelconque des trois moyens précisés ci-dessus ou d'une combinaison quelconque de ces moyens, est de réalisation facile par moulage d'un polymère thermoplastique tel que du polypropylène. Son dispositif d'inviolabilité offre une sécurité totale et s'adapte parfaitement à toutes les chaînes automatiques d'embouteillage et capsulage. La capsule de l'invention s'adapte sur les récipients sans nuire à leur esthétique.The screw closure cap of the invention, provided with sealing means and in particular with any one of the three means specified above or with any combination of these means, is easy to produce by molding. a thermoplastic polymer such as polypropylene. Its tamper-evident device offers total security and adapts perfectly to all automatic bottling and capping chains. The capsule of the invention adapts to the containers without harming their aesthetics.

Claims (6)

1. A screw cap of plastics material having a pilfer-proof strip, which is intended for containers provided with a ring portion (10) comprising a screwthread disposed above a counter-ring portion (11) of which the lower part forms an edge (12), said cap comprising a head (1), a skirt (2) bearing an internal screwthread (3) and a pilfer-proof strip (4) connected to the lower part of the skirt by a plurality of bridge portions (5) forming severable connections, the pilfer-proof strip (4) comprising two parts, a first annular part (4A) connected to the lower part of the skirt (2) by the severable bridge portions (5) and a second part formed by a plurality of tongue portions (6) connected to the first part (4A) by hinges, each tongue portion (6) comprising a heel (8) so disposed as to go beyond the edge (12) of the counter-ring portion (11), with which it comes into abutment, after the tongue portion (6) has been bent back internally against the first annular part (4A) when the cap is screwed on, characterised in that the hinges are formed by reduced-thickness zones (7) and that each tongue portion (6), beyond the heel (8), has a reduced-thickness extension portion (9) which is provided to take up a position of being pinched after screwing between the first annular part (4A) and the counter-ring portion (11).
2. A cap according to Claim 1, characterised in that the tongue portions (6), with the annular part (4A), form an acute angle having its apex on the reduced-thickness zones (7), and are turned towards the inside of the cap.
3. A cap according to Claim 1 or Claim 2, characterised in that the head (1) thereof comprises a sealing means formed by an internal cover portion (13) in the form of an inclined peripheral skirt.
4. A cap according to Claim 1 or Claim 2, characterised in that the head (1) thereof comprises a sealing means constituted by a cover portion (14) formed by a central sleeve in the form of a skirt (15) flanked by a lateral peripheral lip (16), the outside diameter of the skirt (15) being a little smaller than the minimum diameter of the interior (17) of the mouth of the container and the outside diameter of the lateral peripheral lip (16) being a little larger than the maximum diameter of the interior (17) of said mouth.
5. A cap according to Claim 1 or Claim 2, characterised in that, above its screwthread, the interior of its skirt (2) comprises a sealing means formed by a peripheral lip (19) which extends inwardly in such a way that it comes to bear against the outside wall surface of the mouth of the container, in the region between the rounded end configuration and the screwthread of said mouth, when the cap is screwed on.
6. A cap according to Claim 1 or Claim 2, characterised in that it comprises a plurality of the sealing means of Claims 3, 4 or 5.
EP83901205A 1982-04-23 1983-04-19 Plastic threaded closure cap, with improved tamper-proof strip Expired EP0107680B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8207467 1982-04-23
FR8207467A FR2525565B1 (en) 1982-04-23 1982-04-23 SCREW CAPSULE, PLASTIC, WITH IMPROVED SECURITY STRIP
FR8304093A FR2542285B2 (en) 1983-03-07 1983-03-07 TIGHTENING CAPSULE, WITH WATERPROOF SCREW, IN PLASTIC, WITH IMPROVED SECURITY STRIP
FR8304093 1983-03-07

Publications (2)

Publication Number Publication Date
EP0107680A1 EP0107680A1 (en) 1984-05-09
EP0107680B1 true EP0107680B1 (en) 1986-01-29

Family

ID=26222882

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83901205A Expired EP0107680B1 (en) 1982-04-23 1983-04-19 Plastic threaded closure cap, with improved tamper-proof strip

Country Status (9)

Country Link
US (1) US4546892A (en)
EP (1) EP0107680B1 (en)
JP (1) JPS59500667A (en)
AU (1) AU552974B2 (en)
DE (1) DE3361973D1 (en)
ES (1) ES281830Y (en)
IT (1) IT1161145B (en)
SU (1) SU1223835A3 (en)
WO (1) WO1983003809A1 (en)

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Also Published As

Publication number Publication date
US4546892A (en) 1985-10-15
AU552974B2 (en) 1986-06-26
IT1161145B (en) 1987-03-11
EP0107680A1 (en) 1984-05-09
IT8320697A0 (en) 1983-04-20
DE3361973D1 (en) 1986-03-13
AU1472783A (en) 1983-11-21
JPS59500667A (en) 1984-04-19
ES281830Y (en) 1986-05-16
JPH0210023B2 (en) 1990-03-06
SU1223835A3 (en) 1986-04-07
ES281830U (en) 1985-04-01
WO1983003809A1 (en) 1983-11-10

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