EP0234165B1 - Process for manufacturing a screw stopper for a container with a neck with an external thread and device for carrying out this process - Google Patents

Process for manufacturing a screw stopper for a container with a neck with an external thread and device for carrying out this process Download PDF

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Publication number
EP0234165B1
EP0234165B1 EP86420217A EP86420217A EP0234165B1 EP 0234165 B1 EP0234165 B1 EP 0234165B1 EP 86420217 A EP86420217 A EP 86420217A EP 86420217 A EP86420217 A EP 86420217A EP 0234165 B1 EP0234165 B1 EP 0234165B1
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EP
European Patent Office
Prior art keywords
preform
container
mandrel
neck
shaft
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 - Lifetime
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EP86420217A
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German (de)
French (fr)
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EP0234165A1 (en
Inventor
Albert Scheidegger
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.)
Ets Scheidegger W & Cie SA
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Ets Scheidegger W & Cie SA
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Priority claimed from FR8601408A external-priority patent/FR2593472B2/en
Application filed by Ets Scheidegger W & Cie SA filed Critical Ets Scheidegger W & Cie SA
Publication of EP0234165A1 publication Critical patent/EP0234165A1/en
Application granted granted Critical
Publication of EP0234165B1 publication Critical patent/EP0234165B1/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
    • B65D41/32—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
    • B65D41/54—Caps or cap-like covers made of shrinkable material or formed in situ by dipping, e.g. using gelatine or celluloid
    • 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
    • B65D55/00—Accessories for container closures not otherwise provided for
    • B65D55/02—Locking devices; Means for discouraging or indicating unauthorised opening or removal of closure
    • B65D55/06—Deformable or tearable wires, strings, or strips; Use of seals, e.g. destructible locking pins
    • B65D55/08—Annular elements encircling container necks
    • B65D55/0818—Destructible or permanently removable bands, e.g. adhesive
    • B65D55/0854—Shrink-film bands

Definitions

  • the invention relates to a method of manufacturing a plug of the type comprising a cover comprising a cylindrical ferrule intended to be engaged in the bottom of the container and a peripheral gripping edge to which is assembled a skirt in which is fitted a thread screwable on that ass.
  • the cover is made of cork or synthetic material and the skirt belongs to an overcaping capsule, generally made of aluminum, initially smooth and in which the thread is formed by knurling after it has been placed on the butt previously blocked by the operculum, the collar then serving as a punch.
  • the closure method employs complex means and is therefore expensive.
  • the present invention provides a method of manufacturing such screw caps according to claim 1. Starting from the technique consisting of heat shrinking a section of sheath on a threaded neck, this method makes it possible to obtain regular threads on the cap.
  • This process consists, before placing the sheath section on the container, to produce by a first heat-shrinking on a mandrel, a preform comprising, in its part which must subsequently come opposite the threaded zone of the neck, a corrugated zone projecting outside and whose developed length corresponding substantially to the developed length of said threaded area.
  • the sheath section is preformed to present locally and longitudinally a reserve of material allowing, in the subsequent heat-shrinking phase, to fully conform to the profile of the turns of the net, therefore to form a regular net despite the unidirectionality. of the shrinkage of the material.
  • This preform can be produced before deposition on the container closed by the cover or at the same time as it is linked to the cover to form an assembly which can be subsequently deposited on the container.
  • the sheath section 4a instead of being delivered in the form of a cylindrical section having a square cross section with curvilinear sides, as shown in FIG. 1, is preformed to have the shape of the preform 20 shown at Figure 2.
  • This preform 20 which has, in cross section, a circular shape with a diameter greater than the largest diameter of the neck d; container 2, so that it can be slid over this neck, locally has a corrugated area A.
  • the preform 20 When the preform 20 is placed on the cuo of the container, it has, opposite the net of this container, an accumulation of material which, when this container is subjected to the heat-shrinking operation, allows it to perfectly match the contours of the net, despite the unidirectionality of the shrinkage of the sheath.
  • the upper part of the skirt covers the peripheral edge 6 of the cover 3, to which it is linked, while its central part perfectly matches the contours of the container, thus forming a regular net ensuring a good connection with the container and which can be reused without problem when filling it.
  • the container has, at the lower part of its neck 2, a shoulder 22.
  • FIG. 5 denotes a training station and of distribution of sheath sections carrying means 27 distributing the sections 4a by spacing them relative to each other.
  • a well-known device is, for example, of the type described in French patent 2,503,689.
  • This device comprises an endless conveyor 28, the upper strand moving in the direction of arrow 29, goes from the distribution station 7 to a heat-shrinking tunnel 32.
  • the lower strand of the conveyor moves in opposite direction to a station 30 for ejecting the preforms 20.
  • the conveyor belt is integral with mandrels 33 projecting outwards perpendicularly to it. These mandrels are regularly spaced from one another and are capable of receiving a section of sheath 4a, delivered by the distribution station 27.
  • each mandrel is composed of a barrel 34, a central core 35, a sleeve 36 slidably mounted in the annular space 37 formed between the core and the barrel and an outer ring 38 slidably mounted on the barrel 34.
  • the barrel is linked by its base 39, to the two notched belts 40 constituting the conveyor.
  • the connection of the base with each of the belts is ensured by a transverse pin 41 being housed in the gap between teeth of the corresponding belt so as not to stiffen the belt and allow it to marry the return toothed pulleys.
  • the core 35 is tubular and is linked to the barrel 34 by a transverse pin 42.
  • a head 43 which is in the extension of the barrel 34, having the same diameter as it, is spaced from this barrel to form a housing 44 in which are arranged two annular springs 45.
  • the radial displacement necessary to make them protrude from the mandrel 33 is provided by the sleeve 36 whose free end is bevelled 36a and the lower end of which is provided with one and preferably with two fingers 46 passing through the barrel by oblong slots 47.
  • the sliding ring 38 is integral with a stud 49 which, arranged transversely in a through hole 50 of the barrel 34, is subjected to the action of a re return spring 52 disposed in an axial housing 53 of the core 35.
  • This ring 38 is therefore constantly urged by the spring to occupy the position shown in FIG. 6, corresponding to its position for positioning the gain section 4a. It has bearing surfaces 54 able to cooperate with ramps 55 represented schematically by the dashed line in FIG. 5.
  • the heat shrink tunnel 32 is fixed on a mobile support 56 which is connected to a fixed support 57, linked to the chassis of the device, by means 58, such as jacks, capable of vertically moving the support 56 to bring it into an erasing position as soon as the conveyor 28 is stopped.
  • the heat-shrinking tunnel is linked by a flexible pipe 60 to a hot air blower 62.
  • means are provided on the conveyor 24 for synchronizing, in the preform ejection zone, the containers 23 with the mandrels 33
  • the means consist of longitudinal screws 63, the pitch of the turns of which corresponds to the interval between containers and between mandrels 33.
  • each sheath section 4a delivered by the dispensing means 27, is taken up by a mandrel 33 passing under this dispensing station, mandrel whose springs 45 are then retracted. As it advances, the mandrel comes in the vicinity of the ramps 48 which control the extraction of the springs 45. These thus come into contact with the wall of the section.
  • the heat supplied by this tunnel ensures the retraction of the section on the barrel 34 and the head 43 and the formation of two beads constituting the ringed area A.
  • each container 23 with the preform 20 passes through a heat-shrinking tunnel 65 ensuring the retraction of the preform from the threaded part of the container.
  • This device can be used to form either preforms alone, linked to the covers during the final retraction, or assemblies composed of the cover 3 and the preform 20 in order to form capsules which can be dispensed later on the container necks.
  • the head 43 of each of the mandrels comprises a housing for receiving and positioning a cover 3 and the device comprises a cover distributor arranged upstream of the distributor 27 of sheath sections.

Description

L'invention concerne un procédé de fabrication d'un bouchon du type comportant un opercule comprenant une virole cylindrique destinée à être engagée dans le cul du récipient et un bord périphérique de préhension auquel est assemblée une jupe dans laquelle est aménagé un filet vissable sur celui du cul.The invention relates to a method of manufacturing a plug of the type comprising a cover comprising a cylindrical ferrule intended to be engaged in the bottom of the container and a peripheral gripping edge to which is assembled a skirt in which is fitted a thread screwable on that ass.

Actuellement, l'opercule est en liège ou en matière synthétique et la jupe appartient à une capsule de surbouchage, généralement en aluminium, initialement lisse et dans laquelle le filet est formé par moletage après sa mise en place sur le cul préalablement bouché par l'opercule, le col servant alors de poinçon. Le mode de bouchage met en oeuvre des moyens complexes et est donc onéreux.Currently, the cover is made of cork or synthetic material and the skirt belongs to an overcaping capsule, generally made of aluminum, initially smooth and in which the thread is formed by knurling after it has been placed on the butt previously blocked by the operculum, the collar then serving as a punch. The closure method employs complex means and is therefore expensive.

On connaît par ailleurs, par le brevet français 2 503 689 et la demande de brevet français 2 560 156, des dispositifs de surbouchage mettant en oeuvre un tronçon de gaine qui, en matériau synthétique thermorétractable avec rétraction préférentielle dans le sens transversal, c'est à dire circonféren- tiellement, est rétracté par chauffage sur le col lisse et le bouchon d'obturation.Also known, from French patent 2,503,689 and French patent application 2,560,156, overcapping devices using a section of sheath which, in heat-shrinkable synthetic material with preferential retraction in the transverse direction, is ie circumferentially, is shrunk by heating on the smooth neck and the sealing plug.

Pour constituer un bouchon vissable, c'est à dire pouvant être revissé sur le récipient après la première ouverture, il vient à l'esprit de transposer ces dispositifs de bouchage sur un cul fileté pour former le filetage de la jupe par la seule thermorétraction du tronçon de gaine sur le filet du col formant poinçon. Or, l'usage montre que, lors de la thermorétraction du tronçon, et par le fait ce tronçon de gaine se rétracte préférentiellement radialement sur le col, les extrémités du tronçon sont rapidement rétractées sur les parties correspondantes du récipient et bloquent toute possibilité de glissement longitudinal de la gaine. Celle-ci, n'ayant pour des raisons de coût qu'une faculté de rétraction radiale, ne peut pas épouser parfaitement les spires du filet et forme sur la jupe un filet incomplet, insuffisant pour permettre le revissage du bouchon.To constitute a screwable cap, that is to say which can be screwed back onto the container after the first opening, it comes to mind to transpose these plugging devices onto a threaded end to form the thread of the skirt by the sole heat shrinking of the section of sheath on the neck net forming a punch. However, usage shows that, during the heat shrinkage of the section, and in fact this sheath section preferably retracts radially on the neck, the ends of the section are quickly retracted on the corresponding parts of the container and block any possibility of sliding. longitudinal of the sheath. This, having for cost reasons only a radial retraction, can not perfectly match the turns of the net and forms on the skirt an incomplete thread, insufficient to allow the screwing of the cap.

La présente invention fournit un procédé de fabrication de tels bouchons vissables selon la revendication 1. En partant de la technique consistant à thermorétracteur un tronçon de gaine sur un col fileté, ce procédé permet d'obtenir des filets réguliers sur le bouchon.The present invention provides a method of manufacturing such screw caps according to claim 1. Starting from the technique consisting of heat shrinking a section of sheath on a threaded neck, this method makes it possible to obtain regular threads on the cap.

Ce procédé consiste, avant mise en place du tronçon de gaine sur le récipient, à réaliser par une première thermorétraction sur un mandrin, une préforme comportant, dans sa partie devant ultérieurement venir en vis à vis de la zone filetée du col, une zone annelée saillant à l'extérieur et dont la longueur développée correspondant sensiblement à la longueur développée de ladite zone filetée.This process consists, before placing the sheath section on the container, to produce by a first heat-shrinking on a mandrel, a preform comprising, in its part which must subsequently come opposite the threaded zone of the neck, a corrugated zone projecting outside and whose developed length corresponding substantially to the developed length of said threaded area.

Grâce à cet agencement, le tronçon de gaine est préformé pour présenter localement et longitudinalement une réserve de matière permettant, dans la phase de thermorétraction ultérieure, d'épouser totalement le profil des spires du filet donc de former un filet à régulier malgré l'unidirectionnalité de la rétraction de la matière. Cette préforme peut être réalisée avant dépôt sur le recipient obturé par l'opercule ou en même temps qu'elle est liée à l'opercule pour former un ensemble déposable ultérieurement sur le récipient.Thanks to this arrangement, the sheath section is preformed to present locally and longitudinally a reserve of material allowing, in the subsequent heat-shrinking phase, to fully conform to the profile of the turns of the net, therefore to form a regular net despite the unidirectionality. of the shrinkage of the material. This preform can be produced before deposition on the container closed by the cover or at the same time as it is linked to the cover to form an assembly which can be subsequently deposited on the container.

L'invention vise également le dispositif pour la mise en oeuvre du procédé, tel que défini dans la revendication 4. Ce dispositif va être décrit, en même temps que le procédé, en référence au dessin schématique annexé.

  • Figures 1 et 2 sont des vues en perspective montrant respectivement un tronçon de gaine et une forme de réalisation de la préforme;
  • Figures 3 et 4 sont des vues en coupe transversale de l'extrémité supérieure d'un récipient respectivement, après dépose de la préforme de figure 2, et après rétraction de celle-ci sur le récipient;
  • Figure 5 est une vue de côté en élévation montrant, à échelle réduite, l'ensemble du dispositif pour la formation et la distribution des préformes de figure 2, lorsque ce dispositif est disposé directement au dessus d'une chaîne de bouchage;
  • Figure 6 est une vue partielle en coupe transversale montrant à échelle agrandie une forme d'exécution du mandrin utilisé pour la formation des préformes de figure 2.
The invention also relates to the device for implementing the method, as defined in claim 4. This device will be described, at the same time as the method, with reference to the attached schematic drawing.
  • Figures 1 and 2 are perspective views respectively showing a sheath section and an embodiment of the preform;
  • Figures 3 and 4 are cross-sectional views of the upper end of a container respectively, after depositing the preform of Figure 2, and after retraction thereof on the container;
  • Figure 5 is a side elevational view showing, on a reduced scale, the entire device for the formation and distribution of the preforms of Figure 2, when this device is disposed directly above a sealing chain;
  • FIG. 6 is a partial view in cross section showing on an enlarged scale an embodiment of the mandrel used for the formation of the preforms of FIG. 2.

Selon l'invention, le tronçon de gaine 4a, au lieu d'être délivré sous forme d'un tronçon cylindrique ayant une section transversale carrée à côtés curvilignes, comme montré figure 1, est préformé pour présenter la forme de la préforme 20 représentée à la figure 2. Cette préforme 20 qui a, en section transversale, une forme circulaire de diamètre supérieur au plus grand diamètre du col d; récipient 2, de manière à pouvoir être glissée sur ce col, comporte localement une zone annelée A. Cette zone qui est positionnée sur l'ébauche 20 de manière à venir au voisinage de la zone filetée 8 du col du récipient, comme représenté à la figure 3, a une longueur développée qui correspond sensiblement à la longueur de cette partie filetée du récipient.According to the invention, the sheath section 4a, instead of being delivered in the form of a cylindrical section having a square cross section with curvilinear sides, as shown in FIG. 1, is preformed to have the shape of the preform 20 shown at Figure 2. This preform 20 which has, in cross section, a circular shape with a diameter greater than the largest diameter of the neck d; container 2, so that it can be slid over this neck, locally has a corrugated area A. This area which is positioned on the blank 20 so as to come in the vicinity of the threaded area 8 of the neck of the container, as shown in FIG. Figure 3, has a developed length which corresponds substantially to the length of this threaded portion of the container.

Lorsque la préforme 20 est mise en place sur le cuo du récipient, elle présente en vis à vis du filet de ce récipient une accumulation de matière qui, lorsque ce récipient est soumis à l'opération de thermorétraction, lui permet d'épouser parfaitement les contours du filet, malgré l'unidirectionnalité de la rétraction de la gaine. A la fin de la thermorétraction, comme montré à la figure 4, la partie supérieure de la jupe coiffe le bord périphérique 6 de l'opercule 3, auquel elle est liée, tandis que sa partie centrale épouse parfaitement les contours du récipient en formant ainsi un filet régulier assurant une bonne liaison avec le récipient et pouvant être réutilisé sans problème lors du rebouchage de celui-ci.When the preform 20 is placed on the cuo of the container, it has, opposite the net of this container, an accumulation of material which, when this container is subjected to the heat-shrinking operation, allows it to perfectly match the contours of the net, despite the unidirectionality of the shrinkage of the sheath. At the end of the heat shrinkage, as shown in FIG. 4, the upper part of the skirt covers the peripheral edge 6 of the cover 3, to which it is linked, while its central part perfectly matches the contours of the container, thus forming a regular net ensuring a good connection with the container and which can be reused without problem when filling it.

Il est à noter que pour positionner la préforme 20, le récipient comporte, à la partie inférieure de son col 2, un épaulement 22.It should be noted that to position the preform 20, the container has, at the lower part of its neck 2, a shoulder 22.

Il va maintenant être procédé à la description du dispositif pour la réalisation de la préforme 20 et pour sa distribution sur des récipients 23 en défilement continu sur un convoyeur 24, comme montré sur la figure 5. Sur cette figure, 25 désigne un poste de formation et de distribution de tronçons de gaine portant des moyens 27 distribuant, les tronçons 4a en les espaçant les uns par rapport aux autres. Un tel dispositif bien connu, est, par example, du type décrit dans le brevet français 2 503 689.A description will now be given of the device for producing the preform 20 and for distributing it on containers 23 in continuous movement on a conveyor 24, as shown in FIG. 5. In this figure, 25 denotes a training station and of distribution of sheath sections carrying means 27 distributing the sections 4a by spacing them relative to each other. Such a well-known device is, for example, of the type described in French patent 2,503,689.

Ce dispositif comprend un transporteur sans fin 28 dont le brin supérieur se déplaçant dans le sens de la flèche 29, va du poste de distribution 7 à un tunnel de thermorétraction 32. Le brin inférieur du convoyeur se déplace_-en sens inverse jusqu'à un poste 30 d'éjection des préformes 20. Le tapis transporteur est solidaire de mandrins 33 saillants vers l'extérieur perpendiculairement à lui. Ces mandrins sont régulièrement espacés les uns des autres et sont aptes à recevoir un tronçon de gaine 4a, délivré par le poste de distribution 27.This device comprises an endless conveyor 28, the upper strand moving in the direction of arrow 29, goes from the distribution station 7 to a heat-shrinking tunnel 32. The lower strand of the conveyor moves in opposite direction to a station 30 for ejecting the preforms 20. The conveyor belt is integral with mandrels 33 projecting outwards perpendicularly to it. These mandrels are regularly spaced from one another and are capable of receiving a section of sheath 4a, delivered by the distribution station 27.

Dans la forme d'exécution représentée à la figure 6, chaque mandrin est composé d'un fût 34, d'une âme centrale 35, d'un manchon 36 monté coulissant dans l'espace annulaire 37 ménagé entre l'âme et le fût et d'une bague extérieure 38 montée coulissante sur le fût 34. Le fût est lié par son embase 39, aux deux courroies crantées 40 constituant le transporteur. La liaison de l'embase avec chacune des courroies est assurée par une goupille transversale 41 se logeant dans l'intervalle entre dents de la courroie correspondante de manière à ne pas rigidifier la courroie et lui permettre d'épouser les poulies dentées de renvoi. L'âme 35 est tubulaire et est liée au fût 34 par une goupille transversale 42. Elle comporte à son extrémité supérieure une tête 43 dont le diamètre extérieur correspond au diamètre intérieur de la préforme. Cette tête qui est dans le prolongement du fût 34, ayant le même diamètre qu'elle, est espacée de ce fût pour former un logement 44 dans lequel sont disposés deux ressorts annulaires 45. Ces ressorts constituant les moyens éclipsables de formation des bourrelets périphériques de la zone annelée de la préforme, ont tendance, en raison de leur élasticité, à venir contre le fond du logement 44. Le déplacement radial nécessaire pour les faire saillir du mandrin 33 est assuré par le manchon 36 dont l'extrémité libre est biseautée en 36a et dont l'extrémité inférieure est munie d'un et de préférence de deux doigts 46 traversant le fût par des lumières oblongues 47. Ces doigts sont destinés à coopérer avec des rampes fixes 48 disposées sur la partie schématisée par le trait mixte montré à la figure 5. La bague coulissante 38 est solidaire d'un tenon 49 qui, disposé transversalement dans une lumière traversante 50 du fût 34, est soumis à l'action d'un ressort de rappel 52 disposé dans un logement axial 53 de l'âme 35. Cette bague 38 est donc constamment sollicité par le ressort pour occuper la position représentée à la figure 6, correspondant à sa position de positionnement du tronçon de gains 4a. Elle comporte des portées 54 aptes à coopérer avec des rampes 55 représentées schématiquement par le trait mixte à la figure 5. Le tunnel de thermorétraction 32 est fixé sur un support mobile 56 qui est relié à un support fixe 57, lié au châssis du dispositif, par des moyens 58, tels que des vérins, aptes à déplacer verticalement le support 56 pour l'amener dans une position d'effacement dès que le transporteur 28 est arrêté. De façon connue, le tunnel de thermorétraction est lié par une conduite souple 60 à une soufflante d'air chaud 62.In the embodiment shown in Figure 6, each mandrel is composed of a barrel 34, a central core 35, a sleeve 36 slidably mounted in the annular space 37 formed between the core and the barrel and an outer ring 38 slidably mounted on the barrel 34. The barrel is linked by its base 39, to the two notched belts 40 constituting the conveyor. The connection of the base with each of the belts is ensured by a transverse pin 41 being housed in the gap between teeth of the corresponding belt so as not to stiffen the belt and allow it to marry the return toothed pulleys. The core 35 is tubular and is linked to the barrel 34 by a transverse pin 42. It has at its upper end a head 43 whose outside diameter corresponds to the inside diameter of the preform. This head which is in the extension of the barrel 34, having the same diameter as it, is spaced from this barrel to form a housing 44 in which are arranged two annular springs 45. These springs constituting the eclipsable means for forming the peripheral beads of the corrugated zone of the preform, tend, because of their elasticity, to come against the bottom of the housing 44. The radial displacement necessary to make them protrude from the mandrel 33 is provided by the sleeve 36 whose free end is bevelled 36a and the lower end of which is provided with one and preferably with two fingers 46 passing through the barrel by oblong slots 47. These fingers are intended to cooperate with fixed ramps 48 arranged on the part shown diagrammatically by the dashed line shown at Figure 5. The sliding ring 38 is integral with a stud 49 which, arranged transversely in a through hole 50 of the barrel 34, is subjected to the action of a re return spring 52 disposed in an axial housing 53 of the core 35. This ring 38 is therefore constantly urged by the spring to occupy the position shown in FIG. 6, corresponding to its position for positioning the gain section 4a. It has bearing surfaces 54 able to cooperate with ramps 55 represented schematically by the dashed line in FIG. 5. The heat shrink tunnel 32 is fixed on a mobile support 56 which is connected to a fixed support 57, linked to the chassis of the device, by means 58, such as jacks, capable of vertically moving the support 56 to bring it into an erasing position as soon as the conveyor 28 is stopped. In known manner, the heat-shrinking tunnel is linked by a flexible pipe 60 to a hot air blower 62.

Dans cette forme d'exécution, correspondant à la distribution directe des préformes sur des récipients sous-jacents en déplacement, des moyens sont prévus sur le convoyeur 24 pour synchroniser, dans la zone d'éjection des préformes, les récipients 23 avec les mandrins 33. Les moyens sont constitués par des vis longitudinales 63 dont le pas des spires correspond à l'intervalle entre récipients et entre mandrins 33.In this embodiment, corresponding to the direct distribution of the preforms on moving underlying containers, means are provided on the conveyor 24 for synchronizing, in the preform ejection zone, the containers 23 with the mandrels 33 The means consist of longitudinal screws 63, the pitch of the turns of which corresponds to the interval between containers and between mandrels 33.

En fonctionnement, chaque tronçon de gaine 4a, délivré par les moyens distributeurs 27, est prélevé par un mandrin 33 passant sous ce poste de distribution, mandrin dont les ressorts 45 sont alors rétractés. Au fur et à mesure de son avancement, le mandrin vient au voisinage des rampes 48 qui commandent l'extraction des ressorts 45. Ceux-ci viennent ainsi en contact avec la paroi du tronçon. Lors du passage du tronçon dans le tunnel 32, la chaleur fournie par ce tunnel assure la rétraction du tronçon sur le fût 34 et la tête 43 et la formation de deux bourrelets constituant la zone annelée A. Dès que la préforme, ainsi obtenue, atteint une température telle que sa matière constitutive ne risque plus de se rétracter, c'est à dire juste avant le poste d'éjection 30, les rampes 48 interviennent sur les doigts 46 pour provoquer l'éclipsement des ressorts 45. Peu après, les rampes 55 rencontrent les portées 54 de la bague coulissante 38 et forcent cette bague à se déplacer longitudinalement, dans le sens de la flèche 64 et à l'encontre du ressort 52, pour éjecter la préforme 20 sur le col du récipient sous-jacent. Par la suite, chaque récipient 23 avec la préforme 20, passe dans un tunnel de thermorétraction 65 assurant la rétraction de la préforme de la partie filetée du récipient.In operation, each sheath section 4a, delivered by the dispensing means 27, is taken up by a mandrel 33 passing under this dispensing station, mandrel whose springs 45 are then retracted. As it advances, the mandrel comes in the vicinity of the ramps 48 which control the extraction of the springs 45. These thus come into contact with the wall of the section. During the passage of the section in the tunnel 32, the heat supplied by this tunnel ensures the retraction of the section on the barrel 34 and the head 43 and the formation of two beads constituting the ringed area A. As soon as the preform, thus obtained, reaches a temperature such that its constituent material no longer risks shrinking, that is to say just before the ejection station 30, the ramps 48 intervene on the fingers 46 to cause the springs to eclipse 45. Shortly after, the ramps 55 meet the bearing surfaces 54 of the sliding ring 38 and force this ring to move longitudinally, in the direction of the arrow 64 and against the spring 52, to eject the preform 20 on the neck of the underlying container. Thereafter, each container 23 with the preform 20, passes through a heat-shrinking tunnel 65 ensuring the retraction of the preform from the threaded part of the container.

Ce dispositif peut être utilisé pour former, soit des préformes seules, liées aux opercules lors de la rétraction finale, soit des ensembles composés de l'opercule 3 et de la préforme 20 en vue de constituer des capsules distribuables ultérieurement sur les cols de récipient. Pour cette dernière application, la tête 43 de chacun des mandrins comporte un logement pour recevoir et positionner un opercule 3 et le dispositif comporte un distributeur d'opercules disposé en amont du distributeur 27 de tronçons de gaine.This device can be used to form either preforms alone, linked to the covers during the final retraction, or assemblies composed of the cover 3 and the preform 20 in order to form capsules which can be dispensed later on the container necks. For this latter application, the head 43 of each of the mandrels comprises a housing for receiving and positioning a cover 3 and the device comprises a cover distributor arranged upstream of the distributor 27 of sheath sections.

Il ressort de ce qui précède que le recours à une préforme 20 permet, sans grande complication, d'obtenir malgré l'unidirectionnalité de la rétraction de la matière constitutive des tronçons de gaine, des bouchons vissables dont la jupe souple possède des filets parfaitement formés.It appears from the above that the use of a preform 20 allows, without great complication, to obtain despite the unidirectionality of the retraction of the material of the sheath sections, screw caps whose flexible skirt has threads perfectly formed .

Claims (8)

1. A method of manufacturing a screw cap for a container provided with a threaded neck, of the type comprising heat-shrinking a sheath portion surrounding the threaded part of the container and a cap (3) which closes the container, in accordance with which method, a preform (20) is produced, before the sheath portion (4a) is located on the container, by a first heat-shrinking on a mandrel, this preform (20) having, in its portion which will subsequently be disposed opposite to the threaded area (8) of the neck, an externally projecting ringed area A, the developed length of which corresponds substantially to the developed length of said threaded area.
2. A method according to Claim 1, characterised in that it includes effecting the connection of the preform to the cap (3) when the ringed preform (20) is produced.
3. A method according to Claim 1, characterised in that the preform (20) is placed on a neck (2) of the container after the latter has received its closure means (3).
4. A device for carrying out the method according to Claim 1, of the type including an endless transporter (28), the upper side of which passes beneath a distribution station (27) for the sheath portion (4a) and the lower side of which passes by an ejection station (30), the transporter having perpendicularly outwardly projecting members each adapted to receive a sheath portion (4a), the upper side of the transporter passing through a heat-shrinking tunnel (32), located downstream of the distribution station (27), whilst each projecting member of the transporter is constituted by a mandrel (33) on which are mounted, on the one hand, a sliding ring (38) for positioning a sheath portion (4a) and ejecting the preform (20) which has been produced, the ring cooperating with internal means (52) and fixed ramps (55) controlling its movements between a withdrawn position for receiving the portion (4a) at the sheath distribution station and an advanced position at the preform (20) ejection station, and on the other hand, retractable means (45) in a housing (44), for forming peripheral projecting flanges, means cooperating with fixed ramps (48) controlling the projection and retraction of these means (45) between the distribution station (27) and the heat-shrinking tunnel (32) forming the preform on the mandrel.
5. A device according to Claim 4, characterised in that each mandrel (33) -comprises a shaft (34) connected to the transporter (28), a central core (35) connected to the shaft (34), delimiting therewith an annular space (37) and having at its free end a head (43) in the extension of the shaft from which it is separated by a space (44) forming a housing for at least one annular spring (45), a sleeve (36) slidably mounted between the core (35) and the shaft (34), having, on the one hand, at least one pin (46) passing through a longitudinal slot (47) in the shaft to cooperate with fixed means (48) controlling the formation of the flanges and, on the other hand, a chamfered end (36a) adapted to enter the annular spring (45) to increase its diameter and cause it to project radially of the mandrel, and an external ring (38) slidably mounted on the shaft (34), subjected to the action of a return spring (52), holding it in a position in which it locates the sheath portion (4a), and having at least one bearing (54) adapted to cooperate with fixed means (55) controlling its longitudinal displacement as far as its ejection position.
6. A device according to any one of Claims 4 and 5, characterised in that the heat-shrinking tunnel (32) is fixed on a support (56) which, being vertically movable between a lower working position and an upper retracted position, is connected to means (58) adapted to bring it into the upper retracted position when the transporter (28) stops.
7. A device according to any one of Claims 5 to 6, characterised in that, in the case of its application to the immediate capping of the containers, it is disposed parallel to and above the conveyor (24) for the containers (23) and is associated with means (63) for synchronising the advancement of the containers thereunder with that of its mandrels (33), such that each mandrel (33) coincides with a container (23), whereas the fixed means (55) controlling the ejection of each preform (20) are disposed so as to ensure the transfer of each preform on to the neck of the container (23) thereunder.
8. A device according to any one of Claims 4 to 7, characterised in that it has means for distributing the lids one-by-one to coincide with the passage of each mandrel (33) and before the placing of the sheath portion (4a) whilst the head (43) of the shaft of each mandrel (33) is arranged to receive and position a lid.
EP86420217A 1986-01-27 1986-08-25 Process for manufacturing a screw stopper for a container with a neck with an external thread and device for carrying out this process Expired - Lifetime EP0234165B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8601408A FR2593472B2 (en) 1985-08-01 1986-01-27 SCREWABLE PLUG FOR CONTAINER PROVIDED WITH A COLLAR EQUIPPED WITH OUTER THREAD, METHOD FOR MANUFACTURING SAME AND IMPLEMENTATION THEREOF
FR8601408 1986-01-27

Publications (2)

Publication Number Publication Date
EP0234165A1 EP0234165A1 (en) 1987-09-02
EP0234165B1 true EP0234165B1 (en) 1990-02-07

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EP86420217A Expired - Lifetime EP0234165B1 (en) 1986-01-27 1986-08-25 Process for manufacturing a screw stopper for a container with a neck with an external thread and device for carrying out this process

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US (2) US4803829A (en)
EP (1) EP0234165B1 (en)
JP (1) JPS62220487A (en)
DE (1) DE3668867D1 (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4979351A (en) * 1990-02-20 1990-12-25 Eastman Kodak Company Packaging method
US5490827A (en) * 1991-05-21 1996-02-13 Sweetheart Cup Company, Inc. Tamper evident container and related apparatus
AU656776B2 (en) * 1991-05-21 1995-02-16 Sweetheart Cup Company Inc. Tamper evident container assembly
US6735990B1 (en) * 1992-01-24 2004-05-18 Acco Brands, Inc. Computer physical security device
US5658228A (en) * 1992-04-30 1997-08-19 Sweetheart Cup Company, Inc. Tamper evident container and related apparatus
US5654022A (en) * 1995-06-07 1997-08-05 Popcorn Design Llc Heat Shrink capsule for closing flanged bottle tops
DE19739327C2 (en) * 1997-09-09 1999-07-01 Fehland Engineering Gmbh Device for closing beverage containers with caps
US6564531B2 (en) * 1999-04-07 2003-05-20 Dtl Technology Limited Partnership Blow molded container with memory shrink closure attachment and method of making the same
US6263940B1 (en) 1999-04-21 2001-07-24 Axon Corporation In-line continuous feed sleeve labeling machine and method
FR2809706B1 (en) * 2000-06-05 2002-12-13 Christophe Mortreux METHOD FOR MAINTAINING AT LEAST TWO ELEMENTS
FR2811300B1 (en) * 2000-07-06 2003-02-14 Pechiney Emballage Alimentaire ROLLER SKIRT CAPPING CAPSULES
FR2841224B1 (en) * 2002-06-19 2004-08-06 Sleever Int PACKAGING OF OBJECT (S) IN HEAT SHRINKABLE MATERIAL WITH RELIEF PATTERN
ITMI20022324A1 (en) * 2002-10-31 2004-05-01 Enoplastic S P A PROCEDURE FOR FORMING AND APPLYING A WARRANTY CAP-CAP TO VESSELS WITH THREADED MOUTH, AND CAP-CAP CAP SO OBTAINED.
US7028452B2 (en) * 2004-08-31 2006-04-18 Benison & Co., Ltd. Packaging device for fitting and heat-shrinking packaging film
EP1852389A4 (en) * 2005-02-07 2009-06-24 Yuyama Mfg Co Ltd Vial capping device and vial capping method
JP4243259B2 (en) * 2005-04-13 2009-03-25 サントリー株式会社 Packaging material mounting method and packaging material mounting apparatus
US7438250B2 (en) * 2005-11-23 2008-10-21 Suncast Corporation Low entry hose reel device with elevated point of operation
ITBO20070044A1 (en) * 2007-01-25 2008-07-26 Marchesini Group Spa APPARATUS FOR CAPPING OF BOTTLES AND METHOD FOR IMPLEMENTING THIS CAPPING
US8984846B2 (en) * 2010-12-26 2015-03-24 Oriya KLEIN Container closure tool
US10035624B2 (en) * 2012-05-09 2018-07-31 Schreiner Group Gmbh & Co. Kg Closure element for a receptacle
USD739731S1 (en) 2013-10-03 2015-09-29 Anheuser-Busch, Llc Metal beverage bottle
USD739732S1 (en) 2013-10-03 2015-09-29 Anheuser-Busch, Llc Metal beverage bottle
DE102014104323A1 (en) * 2014-03-27 2015-10-01 Khs Gmbh Crown cap closure, closure method and closure device for containers
CN105039878B (en) 2014-04-30 2017-11-07 美铝美国公司 The aluminium vessel that aluminium sheet and the aluminium sheet with high formability are made
US11390408B2 (en) * 2020-11-24 2022-07-19 Axon Llc System and method for applying tubular bands to containers utilizing angled band ejection

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US825116A (en) * 1905-06-13 1906-07-03 Max Engels Process of closing or sealing apertures.
US2068107A (en) * 1934-04-02 1937-01-19 Celon Company Apparatus for applying bands on containers
US2666542A (en) * 1948-05-24 1954-01-19 Charles S Price Adhesive metal foil, bottle cap thereof, and method
US2790286A (en) * 1953-05-11 1957-04-30 Goodyear Tire & Rubber Secondary closures
US2790285A (en) * 1953-07-27 1957-04-30 Goodyear Tire & Rubber Secondary closures
US2885105A (en) * 1955-08-30 1959-05-05 Grace W R & Co Preformed shrinkable closures for containers
US3417539A (en) * 1966-10-06 1968-12-24 Hirohama Juji Method of forming a container closure
US4104845A (en) * 1974-05-21 1978-08-08 B & H Manufacturing Company, Inc. Method and apparatus for applying sleeves to necks of bottles and other containers
US4187276A (en) * 1976-07-16 1980-02-05 Owens-Illinois, Inc. Method of making a plastic package
DE2804851A1 (en) * 1978-02-04 1979-08-09 Loos Co Gmbh Metallkapsel Heat shrink bottle caps with foil backed tear tabs - to inhibit curling of the tab heads during application
US4177905A (en) * 1978-06-05 1979-12-11 Baxter Travenol Laboratories, Inc. Closure system for containers
JPS5548028A (en) * 1978-09-14 1980-04-05 Fuji Seal Ind Co Ltd Method of inserting soft cylindrical body flatly folded and its device
JPS56123838A (en) * 1980-03-06 1981-09-29 Sumitomo Bakelite Co Ltd Method and apparatus for bottom mounting for cylindrical container
CH646398A5 (en) * 1980-03-28 1984-11-30 Obrist Ag Albert METHOD AND DEVICE FOR SCREWING ON A CAP FROM PLASTIC MATERIAL ON A CONTAINER MOUNT.
CH645314A5 (en) * 1980-04-10 1984-09-28 Tetra Pak Dev BOTTLE CAP.
US4387553A (en) * 1981-01-02 1983-06-14 Strub Eric W Banding apparatus
FR2560156B1 (en) * 1984-02-27 1986-11-14 Cebal WATERPROOF AND INVIOLABLE OVERCAP DEVICE AND METHOD FOR PRODUCING THE SAME

Also Published As

Publication number Publication date
US4803829A (en) 1989-02-14
JPS62220487A (en) 1987-09-28
EP0234165A1 (en) 1987-09-02
DE3668867D1 (en) 1990-03-15
US4947627A (en) 1990-08-14

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