EP1744967A1 - Bouchon filete en plastique - Google Patents

Bouchon filete en plastique

Info

Publication number
EP1744967A1
EP1744967A1 EP04803969A EP04803969A EP1744967A1 EP 1744967 A1 EP1744967 A1 EP 1744967A1 EP 04803969 A EP04803969 A EP 04803969A EP 04803969 A EP04803969 A EP 04803969A EP 1744967 A1 EP1744967 A1 EP 1744967A1
Authority
EP
European Patent Office
Prior art keywords
sealing strip
closure
sealing
bottleneck
top plate
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.)
Ceased
Application number
EP04803969A
Other languages
German (de)
English (en)
Inventor
Alexander Schmitz
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.)
CCT Creative Closure Tech GmbH
Original Assignee
CCT Creative Closure Tech GmbH
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
Application filed by CCT Creative Closure Tech GmbH filed Critical CCT Creative Closure Tech GmbH
Publication of EP1744967A1 publication Critical patent/EP1744967A1/fr
Ceased legal-status Critical Current

Links

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
    • B65D41/0414—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
    • B65D41/0421—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 and combined with integral sealing means contacting other surfaces of a container neck

Definitions

  • the present invention relates to a plastic screw cap for bottles, in particular for pressurized beverage bottles.
  • a set for creating a sealed with this plastic screw cap bottle is presented.
  • Such a plastic screw closure is known, for example, from EP 0 529 383 B2.
  • Kunststoffschraubver gleich from a cylindrical shell in the basic form with internal thread and a substantially circular disk-shaped head plate, on the inside of a thin, annular sealing strip is integrally formed and at its transition to the cylindrical shell on the inside a bead for pressing the Sealing strip is provided on the upper, outer edge of a bottle neck with a flat annular end face.
  • the bead has a concentric to the closure axis, at least partially cylindrical inner wall whose diameter is slightly larger than the outer diameter of the upper bottle neck edge.
  • the sealing strip is formed substantially cylindrical, the outer diameter of the Sealing strip is approximately equal to the outer diameter of the bottle neck edge, and that on both sides of the sealing strip a circumferential groove is provided in the top plate, such that the sealing strip when screwing between the bead and bottle neck not only in the region of the rounded transition is clamped between the annular end face and the outer cylinder jacket surfaces, but is further drawn by the bead in the annular gap between the outer cylindrical surface of the bottle neck and the cylindrical inner wall of the bead.
  • Such a plastic screw cap is also referred to as an outer seal, since the sealing effect arises primarily between the bottleneck edge and the bead, namely by pulling the annular sealing strip into this intermediate space.
  • the Kunststoffschraubver gleich in addition to the aforementioned features further features that radially within the cylindrical sealing strip another, substantially cylindrical sealing strip is provided with a cross-sectional shape which corresponds approximately to an olive, whose outer diameter at least is greater than the inner diameter of a bottle neck for which the closure is provided, and the deviation (
  • 2 ⁇ denotes the outer diameter of the sealing olive, in the region in which it engages with the upper bottle neck edge
  • d denotes the inner diameter of the bottle neck edge in this region.
  • D stands for the inner diameter of the sealing strip and 2r 2 for the outer diameter of the bottle neck.
  • KunststoffschraubverInstitut is also referred to as a double sealer, since this not only has the outer seal of the aforementioned publication, but also a Dichtolive, which applies from the inside to the inner bottle neck edge.
  • the tightness should be increased by using a double seal.
  • this is not necessarily true. If the double seal is screwed onto the neck of the bottle neck, then the outer sealing strip and the sealing olive carry opposite evasive movements to the outside or to the inside, as seen from the bottleneck edge. This results in the top plate between the sealing strip and the Dichtolive a bending stress, which has restoring forces result, with the effect that while the sealing olive is pressed more strongly against the inner bottle neck edge, the outer sealing strip, however, urged by the restoring forces away from the bead and so the sealing effect of the outer weather strip is reduced.
  • the plastic screw cap according to the invention also has an outer seal according to the type of EP 0 529 383 B2.
  • a second sealing strip is disposed radially inside the cylindrical first sealing strip - the outer seal - and also extends axially from the inside of the head plate, sealingly engaging the bottleneck inner edge as the closure is screwed onto the bottle neck ,
  • the root of said second sealing strip on the top plate is formed so narrow that the evasive movements of both sealing strips when unscrewing the closure on the bottle neck are largely decoupled from each other so that virtually no the sealing effect of a sealing strip lowering forces in the Evasive movement of the other sealing strip act.
  • This embodiment can be further developed advantageous in that on both sides of the first sealing strip a circumferential groove is recessed in the top plate. By this material weakening, the mobility of the outer first sealing strip is increased at its root. Bending moments are thus no longer coupled into the top plate, so that the negative restoring forces do not occur.
  • the region of the greatest radial extent of the inner second sealing strip then preferably represents the sealing region with respect to the false neck.
  • the radial undercut lies between the root of the second sealing strip towards its greatest radial extent in the Range from 0.4 to 1, 4 mm. In the diameter range, twice the values result.
  • the molding may preferably be provided so that the edge of the bottle neck initially comes into contact with the radial recess of the second sealing strip.
  • the effect of the radial return to a certain extent as a cam track is expressed.
  • FIG. 2 shows an enlarged partial cross section through the plastic screw closure according to FIG. 1,
  • FIG. 3 shows a schematic view like FIG. 2 with a plastic screw cap screwed on almost completely to a bottleneck
  • FIG. 4 shows a view similar to FIG. 1 through a second embodiment of the invention
  • Figure 5 is a view similar to Figure 2 through the embodiment of Figure 4, and
  • Figure 6 is a view similar to Figure 3 with almost completely screwed onto a bottleneck plastic screw cap.
  • FIG. 1 provides a first overview. It schematically shows a cross section through a first embodiment of the plastic screw cap. It consists first of a cap 1 with a substantially cylindrical shell 2, in which an internal thread 3 for screwing onto the external thread of a bottle neck 4 (Figure 2) is formed. For the sake of simplicity, the illustration of an external thread of the bottle neck 4 has been omitted.
  • a substantially circular disk-shaped top plate 5 is provided, which is formed integrally with the cylindrical shell 2.
  • the Kunststoffschraubver gleich has a substantially cylindrical and axially extending from the inside of the top plate 5 first sealing strip 6. Its outer diameter corresponds at most to the outer neck diameter or is slightly smaller than this. Its inner diameter is clearly smaller than the outer bottle neck diameter, as is apparent from Figure 2.
  • a bead 7 with an approximately cylindrical inner surface 8 is provided at the transition from the top plate 5 to the cylindrical shell 2. Their inner diameter is at most equal and preferably slightly less than the sum of the outer bottle neck diameter and the thickness of the weather strip 6.
  • the outer sealing strip 6 acts essentially like the outer sealing strip, as described in EP 0 529 383 B2.
  • a radially inside the cylindrical first sealing strip 6 second sealing strip 9 is arranged, which extends like this from the inside of the top plate 5 axially and which engages when screwing the closure on the bottle neck 4 from the inside to the bottleneck inner edge 10 in a sealing manner.
  • the root 11 of the second, inner DichtungsstMails ⁇ on the top plate 5 of the closure is now so narrow that the evasive movements of the two sealing strips 6 and 9 practically do not affect each other when screwing the closure on the bottle neck 4.
  • An evasive movement of the one Sealing strip causes virtually no sealing effect of the other sealing strip lowering forces.
  • This is mainly due to the narrow design of the root 11, which produces a kind of hinge for the sealing strip 9, which can transmit no bending moments. Therefore, the area of the head plate 5 between the two sealing strips 6 and 9 remains largely free of bending stress, so that no pressure forces of the sealing strip 6 to the cylindrical inner surface 8 of the bead 7 lowering forces are generated.
  • This effect is preferably increased in the embodiment by the fact that radially outside the first sealing strip 6, a circumferential groove 12 is recessed in the top plate 5.
  • the mobility of the sealing strip 6 is significantly increased and there is virtually a second joint in the system of both sealing strips 6 and 9.
  • the screwing and unscrewing forces of the screw cap are significantly reduced compared to known double sealers. In the approach, however, this also applies if no groove 12 is provided.
  • the inner second sealing strip 9 is formed such that its radially outer surface initially extends conically radially widening from the root 11, and then, after reaching a greatest radial extent 13, passes into a radial recess 14.
  • the area of the largest radial extent 13 of the second sealing strip 9 represents the sealing area relative to the bottleneck 4, as clearly shown in FIG.
  • undercuts H between the approach of the root 11 and the largest radial extent 13 in the range of 0.4 to 1, 4 mm are achieved, each seen in the radius. Screwing the closure onto the bottle neck 4 initially causes the upper bottle neck edge to slide onto the radial recess 14, whereby a first evasion movement radially inward of the sealing strip 9 is achieved.
  • the bottle may preferably be a PET bottle, either a disposable or a returnable bottle.
  • FIGS. 4 to 6 will only be briefly explained insofar as differences from the first embodiment according to FIGS. 1 to 3 are present.
  • the outer radial sealing strip 6 is offset radially inwardly.
  • a circumferential groove 12 is also provided here radially outside to also keep the mobility of the sealing strip 6 high, as well as those of the second radially inner sealing strip.

Landscapes

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

Abstract

L'invention concerne un bouchon fileté en plastique destiné à des bouteilles, notamment à des bouteilles pour liquides alimentaires sous pression. Ledit bouchon est composé d'un capuchon (1) comportant une enveloppe essentiellement cylindrique (2) présentant un filet intérieur (3) destiné à être vissé sur le filet extérieur d'un goulot de bouteille (4), une plaque de tête (5) essentiellement circulaire, et une rainure d'étanchéité essentiellement cylindrique (6) s'étendant axialement à partir du côté intérieur de la plaque de tête (5), dont le diamètre extérieur maximal correspond au diamètre extérieur du goulot de bouteille ou est légèrement inférieur à celui-ci, et dont le diamètre intérieur est nettement inférieur au diamètre extérieur du goulot de bouteille. Un bourrelet (7) présentant un côté intérieur essentiellement cylindrique (8) et dont le diamètre intérieur maximal correspond, ou est de préférence légèrement inférieur à la somme du diamètre extérieur du goulot de bouteille et de l'épaisseur de la rainure d'étanchéité (6), est pratiqué radialement à l'extérieur de la rainure d'étanchéité (6), au niveau de la transition entre la plaque de tête (5) et l'enveloppe du bouchon (2). Le bouchon selon l'invention comporte par ailleurs une deuxième rainure d'étanchéité (9) disposée radialement à l'intérieur de la première rainure d'étanchéité (6), s'étendant également axialement à partir du côté intérieur de la plaque de tête (5), et s'appuyant de façon étanche contre le bord intérieur (10) du goulot, à partir de l'intérieur, lorsque le bouchon (4) est vissé sur le goulot. Selon l'invention, la base (11) de la deuxième rainure d'étanchéité (9) est conçue de façon si étroite sur la plaque de tête (5) que les mouvements de déviation des deux rainures d'étanchéité (6, 9) sont largement découplés l'un par rapport à l'autre, de telle manière qu'aucune force réduisant l'effet d'étanchéité d'une des rainures d'étanchéité n'est créée lors du mouvement de déviation de l'autre rainure d'étanchéité.
EP04803969A 2004-12-16 2004-12-16 Bouchon filete en plastique Ceased EP1744967A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2004/014356 WO2006063607A1 (fr) 2004-12-16 2004-12-16 Bouchon filete en plastique

Publications (1)

Publication Number Publication Date
EP1744967A1 true EP1744967A1 (fr) 2007-01-24

Family

ID=34959825

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04803969A Ceased EP1744967A1 (fr) 2004-12-16 2004-12-16 Bouchon filete en plastique

Country Status (2)

Country Link
EP (1) EP1744967A1 (fr)
WO (1) WO2006063607A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080110851A1 (en) * 2006-10-13 2008-05-15 Owens-Illinois Closure Inc. Dual seal closure and package

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128474A1 (de) * 1991-08-28 1993-03-04 Berg Jacob Gmbh Co Kg Kunststoffschraubverschluss fuer unter druck stehende flaschen
US5297688A (en) * 1992-03-03 1994-03-29 Creative Packaging Corp. Closure for sealing a container rim
DE29623290U1 (de) * 1995-10-31 1998-02-19 Safety Cap System Ag Verschluß für eine Flasche o.dgl.
DE19705717A1 (de) * 1997-02-14 1998-08-20 Bericap Gmbh & Co Kg Kunststoffschraubverschluß
US20020074306A1 (en) * 1997-02-14 2002-06-20 Gunter Krautkramer Plastic screw closure
TR199902714T1 (xx) * 1998-03-03 2000-09-21 Schellenbach Frank Yerinden ��kan bir garanti band� ve i�te bir s�zd�rmaz hale getiriciyi ihtiva eden halka �eklinde plastik kapak.
EP0982234A1 (fr) * 1998-08-22 2000-03-01 Crown Cork & Seal Technologies Corporation Capuchon de fermeture

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006063607A1 *

Also Published As

Publication number Publication date
WO2006063607A1 (fr) 2006-06-22

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