EP0960054A1 - Fermeture a vis en matiere plastique - Google Patents

Fermeture a vis en matiere plastique

Info

Publication number
EP0960054A1
EP0960054A1 EP98909299A EP98909299A EP0960054A1 EP 0960054 A1 EP0960054 A1 EP 0960054A1 EP 98909299 A EP98909299 A EP 98909299A EP 98909299 A EP98909299 A EP 98909299A EP 0960054 A1 EP0960054 A1 EP 0960054A1
Authority
EP
European Patent Office
Prior art keywords
sealing
bottle neck
sealing strip
plastic screw
olive
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.)
Granted
Application number
EP98909299A
Other languages
German (de)
English (en)
Other versions
EP0960054B1 (fr
EP0960054B2 (fr
Inventor
Günter Krautkrämer
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.)
Bericap GmbH and Co KG
Original Assignee
Bericap GmbH and Co KG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7820278&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0960054(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Bericap GmbH and Co KG filed Critical Bericap GmbH and Co KG
Publication of EP0960054A1 publication Critical patent/EP0960054A1/fr
Publication of EP0960054B1 publication Critical patent/EP0960054B1/fr
Application granted granted Critical
Publication of EP0960054B2 publication Critical patent/EP0960054B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S215/00—Bottles and jars
    • Y10S215/901—Tamper-resistant structure

Definitions

  • the present invention relates to a plastic screw cap for bottles, consisting of a substantially cylindrical jacket with an internal thread for screwing onto the external thread of a bottle neck, and with a substantially circular disc-shaped head plate and a substantially cylindrical head extending axially inwards from the inside of the head plate Sealing strip, the outer diameter of which corresponds approximately to the outer bottle neck diameter or is slightly larger and the inner diameter of which is clearly smaller than the outer edge of the bottle neck.
  • the known plastic screw cap is intended for screwing onto the threaded neck of bottles and is designed so that the approximately cylindrical sealing strip lies on the top and outside of the bottle neck edge and thereby essentially along the upper outer, rounded edge of the bottle neck or the mouth of the bottle fits tightly.
  • the sealing strip is additionally clamped between an outer, approximately cylindrical bead and the bottle neck and pulled and pressed in firm sealing engagement with the edge of the bottle neck.
  • such a closure would also be for plastic tabs, e.g. PET bottles, usable.
  • closure cap has already become known which is intended to ensure a particularly good sealing engagement.
  • this known closure cap instead of an approximately cylindrical sealing strip, this known closure cap, however, has an approximately horizontally extending sealing strip which lies on the upper edge of the bottle neck, additional annular projections being provided on the bottom or the top plate of the closure cap, on the side opposite the edge of the bottle neck of the sealing strip engage with it and should exert a linear sealing pressure on the sealing strip.
  • an inner, approximately cylindrical sealing olive is provided, the term "olive" vividly describing the lower cross-section of this part, which has an outwardly projecting area which is also intended to engage approximately linearly with the cylindrical inner surface of the bottle neck.
  • the inner surface of a bottle neck is generally fairly precisely defined, at least in the case of PET bottles, but it may well be damaged, so that the projection of the sealing olive, despite its essentially linear engagement with the inside of the bottle neck, cannot guarantee a secure seal.
  • the sealing projection in the known closure is also provided at a considerable distance from the attachment of the sealing lamella to the head plate, so that there are no very high elastic restoring or pressing forces in the region of the projection.
  • An essentially radially extending sealing lamella partly covers the outer, generally well-defined, rounded bottle neck edge, which, however, can also be damaged, but, like the sealing olive, does not cover the inner, slightly rounded edge of the bottle neck edge.
  • These parts which are positioned differently with respect to the axis of the closure, define a blind hole-like depression with considerable undercut, which causes considerable problems during the production and in the necessary pressing out of air.
  • the known closures therefore have, at least in part, problems during manufacture and in particular during demolding and, on the other hand, do not yet provide an absolutely secure seal in the event of minor damage or deformation of the edge of the bottle neck.
  • the present invention has for its object to provide a plastic screw cap with the features mentioned, which prevents leaks even better in the event of slight damage or deformation of the edge of the bottle neck and which should also be easy to remove from the mold if possible to To facilitate manufacture with an injection mold that is as simple as possible.
  • the plastic screw closure has the further features that a further, essentially cylindrical sealing olive is provided radially inside the cylindrical sealing strip, the outside diameter of which is at least in the area near the head plate and opposite the sealing strip is larger than the inside diameter of a bottle neck for which the closure is intended.
  • an inner sealing olive is additionally provided which additionally seals the inner surface at the upper edge of the bottle neck .
  • This sealing olive also has a larger outer diameter than in the area near the head plate and opposite the sealing strip, ie in the area in which the upper edges of the bottle neck normally also lie when the cap is screwed onto a bottle it corresponds to the inside diameter of the bottle neck or the bottle neck edge in this area, so that the inner sealing olive is pushed radially inwards and thereby seals against the inside surface of the bottle neck edge.
  • the clear distance between the sealing strip and the sealing olive must be smaller than the thickness of the Bottle edge corresponds.
  • An embodiment of the invention is particularly preferred in which the clear distance between the sealing strip and sealing olive in the sealing region is less than two thirds, possibly even less than half the thickness of the bottle neck. Since the sealing olive as well as the sealing strip preferably consist of the plastic material of the closure, they have sufficient elasticity to be pushed away by the edge of the bottle neck when the closure is put on or screwed on, but due to the elastic restoring forces that occur in very firm, sealing engagement the top of the bottle neck.
  • the sealing olive has a flat bead on its outside, which in cross section has approximately the shape of an obtuse-angled triangle.
  • the sealing olive is preferably rounded and / or beveled, so that during the axial movement in the direction of the bottle neck the sealing olive is actually pressed radially inwards and is not seated on the edge of the neck or is even pushed radially outwards.
  • the sealing strip also has a rounded and / or beveled shape at its free end, so that it is spread radially outward when it moves axially towards the bottle neck when it comes into engagement with the bottle neck edge.
  • sealing strips and sealing olive can be characterized in that their deviations from an exact hollow cylinder shape in are essentially limited to the outer wall of the approach and to the inner wall of the weather strip.
  • the olive is about twice as thick and at least 50% longer (in the axial direction) than the sealing strip.
  • the axial length of the sealing olive is preferably even approximately twice the axial length of the sealing strip.
  • the deviation of the outside diameter of the sealing olive from the diameter of the bottle neck edge, at least in the area where the seal essentially occurs, is less than the corresponding deviation of the inside diameter of the sealing strip from the outside diameter of the bottleneck rim, since the sealing strip is thinner and shorter and therefore more easily stretchable and movable away.
  • the outer surfaces of the sealing olive and the inner surface of the weather strip are substantially parallel across the axial extent of the weather strip, i.e. one has an approximately constant clear width between the sealing olive and sealing strip over the length of the sealing strip, and the outer surface of the sealing olive runs parallel to the beveled and rounded shape of the same, especially at the axial height of the end of the sealing strip.
  • the cavity formed between the sealing olive and the sealing strip has a narrow, slightly concave curvature and is rounded at the top, is open at its lower end and closed at the top.
  • the cavity which is slightly curved from bottom to top, has a substantially constant width in cross section and tapers only at its upper closed and rounded end, the upper section being almost cylindrical with respect to the closure axis, and the lower section flared outwards.
  • the axial length of the cavity which is significantly narrower than the associated bottle shark is thick, is defined by the length of the outer sealing strip, which in turn is relatively short, so that when screwed onto a bottle neck, it just completely completes the rounded bottle neck edge includes.
  • this cavity has an axial depth (corresponding to the axial length of the sealing strip) of less than 4 mm, preferably less than 3 mm and in particular about 2 to 2.5 mm.
  • the free end of the jacket of the screw cap is preferably provided in one piece with a guarantee and tear-off tape.
  • the closure in the preferred embodiment is made in one piece from a homogeneous plastic material using injection molding technology.
  • the essentially cylindrical shapes of the sealing olive and Sealing strip and the short axial length of the same allow relatively easy and simple demolding and a correspondingly simply shaped production tool.
  • FIG. 1 a shows the screw cap according to the invention in an enlarged sectional view containing the axis
  • FIG. 1 b shows the screw cap according to FIG. 1 a in a side view, approximately in original size
  • FIG. 2 shows the cap according to FIG. 1 in the same axial sectional plane, but in one on a bottle neck screwed on condition.
  • the screw cap in a longitudinal section containing the axis.
  • the screw cap consists essentially of a cylindrical jacket 1 with an integrally connected, approximately circular disc-shaped head plate 2.
  • the cylindrical jacket 1 has a partially interrupted internal thread 8 and on the outside of a gripping 9, which should facilitate the application of torque when gripping the cap with your fingers.
  • the two elements which effect the seal with the bottle neck are the annular circumferential, cylindrical sealing strip 4 and the sealing olive 3, which is also circular and parallel to it.
  • the outer wall of the cylindrical sealing strip 4 like the inner wall of the cylindrical sealing olive 3, runs on average straight and therefore pretty exactly cylindrical.
  • the inner wall of the cylindrical sealing strip 4 runs axially parallel only over a relatively short section and is then rounded in the direction of the free end and extends obliquely outwards.
  • the outer wall of the cylindrical "olive" 3 has a cross-sectionally flat bead approximately in the form of an obtuse-angled triangle, the obtuse tip of this obtuse-angled triangle defining the maximum outer diameter of the attachment 3 or the bead and axially approximately with the free end of the weather strip 4 coincides.
  • the outer wall of the head plate 2 then runs cylindrical sealing olive 3, starting from the bead approximately parallel to the oblique and rounded end section before it again runs approximately axially parallel and then merges into the inner wall of the sealing strip 4.
  • FIG 1b the closure is shown approximately in natural size in a side view.
  • the corrugation 9 on the outside of the screw cap, which should make it easier to screw the closure on and off, as well as the lower guarantee and tear-off band 7.
  • the rest is shown exactly to scale in FIGS. 1 and 2, the dimension R a is slightly less than 31 mm. Because of the true-to-scale representation, all other dimensions can also be derived from this, and the absolute and relative dimensions of all elements are disclosed by the figures due to the true-to-scale representation. It is understood, however, that the invention is not limited to compliance with the absolute and relative dimensions of the individual elements of the closure cap.
  • the free end of the sealing olive 3 is also significantly rounded, so that the free end of the sealing olive 3, when it strikes the edge of a bottle neck, slides inwards and is pushed away.
  • the plastic screw cap can be seen again in the same sectional plane, but in the state firmly screwed onto a bottle neck.
  • the sealing olive 3 has been pushed inwards by the engagement of its rounded free end with the end face of the bottle neck 10, the bead lies against the inner, cylindrical surface of the bottle neck.
  • the cylindrical olive 3 is pushed inwards and compressed, so that there is a corresponding elastic restoring force, which produces a tight sealing engagement.
  • the seal results from the engagement with the sealing strip 4, which when its free, rounded or beveled end comes into engagement with the end face of the bottle neck is pushed outward and then clamped between the outer surface of the bottle neck and a cylindrical bead 5 and is drawn through the bead around the upper outer edge of the bottle, this bead 5 being provided at the transition between the cap jacket and the top plate and having a substantially cylindrical inner surface.
  • the sealing olive 3 is significantly thicker and preferably about twice as thick (without considering the bead) as the sealing strip 4, it is provided in the preferred embodiment of the invention that the outer diameter 2R 1 of the sealing olive, in the area in which it is the upper edge of the bottle neck engages, a smaller difference to the inner diameter d of the Bottleneck edge in this area has as the sealing strip 4 with its inner surface relative to the outer edge of the bottle neck, since the sealing strip 4 is more easily deformable than the sealing olive 3 when the same force is applied. This can also be clearly seen in FIG. 2 and by comparison with FIG .
  • between the sealing olive and the inner edge of the bottle neck when the closure is not screwed onto a bottle neck is only about a third to a quarter of the difference in diameter D - 2r 2 between the inner surface of the sealing strip and the outer edge of the bottle neck.
  • the closure according to the invention ensures that both the upper outer edge and the inner surface of the bottle neck mouth are enclosed and sealed between two opposing sealing elements. You have two almost equivalent and independent seals, so that in the event of unnoticed damage, deformation or tolerance deviations of the upper edge of the bottle neck, the probability that at least one of the two seals ensures a sufficient seal is relatively large, since it is unlikely that a damage or deformation that covers both the upper outer edge and the upper inner surface of the bottle neck edge remains unnoticed.
  • the bottle neck exerts radially opposite forces on the two sealing elements, which largely cancel each other out. This prevents the head plate (or cap base) which absorbs these forces from conventional one-sided seals from yielding to these forces through slow flow and thus gradually weakens the sealing engagement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Insulators (AREA)
  • Finger-Pressure Massage (AREA)
  • Prostheses (AREA)
  • Materials For Medical Uses (AREA)

Abstract

L'invention concerne une fermeture à vis en matière plastique pour bouteilles, comprenant une coiffe présentant une enveloppe sensiblement cylindrique (1) dotée d'un filetage intérieur (8) permettant à cette coiffe d'être vissée sur le filetage extérieur (11) du goulot d'une bouteille (10), une tête de recouvrement en forme générale de disque (2), ainsi qu'une bande d'étanchéité (4) sensiblement cylindrique, s'étendant axialement à partir de l'intérieur de la tête de recouvrement (2) et dont le diamètre extérieur correspond à peu près au diamètre extérieur du goulot de la bouteille ou est légèrement supérieur à celui-ci, et dont le diamètre intérieur (2R2) est nettement inférieur au diamètre extérieur (D) du goulot de la bouteille. L'invention a pour but de fournir une fermeture du type précité, empêchant les fuites en cas de légers dommages ou déformations en bordure du goulot, tout en étant, dans la mesure du possible, légèrement déformable, afin de simplifier la fabrication au moyen d'un outil de moulage par injection aussi simple que possible. Ce but est atteint, conformément à l'invention, grâce au fait qu'il est prévu radialement à l'intérieur de la bande d'étanchéité cylindrique (4), une autre olive d'étanchéité (3) sensiblement cylindrique, dont le diamètre extérieur (2R1), au moins dans la zone voisine de la tête de recouvrement et opposée à ladite bande d'étanchéité (4), est plus grand que le diamètre intérieur (d) du goulot de la bouteille (10) pour lequel la fermeture est prévue.
EP98909299A 1997-02-14 1998-01-29 Bouteille pet avec fermeture a vis en matiere plastique Expired - Lifetime EP0960054B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19705717A DE19705717A1 (de) 1997-02-14 1997-02-14 Kunststoffschraubverschluß
DE19705717 1997-02-14
PCT/DE1998/000266 WO1998035881A1 (fr) 1997-02-14 1998-01-29 Fermeture a vis en matiere plastique

Publications (3)

Publication Number Publication Date
EP0960054A1 true EP0960054A1 (fr) 1999-12-01
EP0960054B1 EP0960054B1 (fr) 2001-10-04
EP0960054B2 EP0960054B2 (fr) 2005-05-04

Family

ID=7820278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98909299A Expired - Lifetime EP0960054B2 (fr) 1997-02-14 1998-01-29 Bouteille pet avec fermeture a vis en matiere plastique

Country Status (18)

Country Link
US (1) US6325226B1 (fr)
EP (1) EP0960054B2 (fr)
JP (1) JP2001511744A (fr)
CN (1) CN1166532C (fr)
AT (1) ATE206379T1 (fr)
AU (1) AU724859B2 (fr)
BR (1) BR9807364A (fr)
CA (1) CA2281705C (fr)
CZ (1) CZ291781B6 (fr)
DE (3) DE19705717A1 (fr)
ES (1) ES2162423T5 (fr)
HU (1) HUP0000612A3 (fr)
PL (1) PL189578B1 (fr)
RO (1) RO117781B1 (fr)
RU (1) RU2182877C2 (fr)
TR (1) TR199901960T2 (fr)
UA (1) UA42884C2 (fr)
WO (1) WO1998035881A1 (fr)

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WO2014060893A1 (fr) 2012-10-18 2014-04-24 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Capuchon de contenant

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JP6282354B2 (ja) 2014-02-14 2018-02-21 クロージヤー・システムズ・インターナシヨナル・インコーポレーテツドＣｌｏｓｕｒｅ Ｓｙｓｔｅｍｓ Ｉｎｔｅｒｎａｔｉｏｎａｌ Ｉｎｃ． 改良された不正開封証拠明示蓋
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JP7332613B2 (ja) * 2018-09-13 2023-08-23 日本山村硝子株式会社 合成樹脂製キャップ
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2828172A1 (fr) * 2001-07-31 2003-02-07 Rical Sa Bouchon comportant un joint solidarise a sa paroi transversale, au centre d'une jupe interieure
WO2014060893A1 (fr) 2012-10-18 2014-04-24 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Capuchon de contenant

Also Published As

Publication number Publication date
ES2162423T5 (es) 2005-09-01
US6325226B1 (en) 2001-12-04
TR199901960T2 (xx) 1999-12-21
HUP0000612A3 (en) 2000-10-30
RU2182877C2 (ru) 2002-05-27
AU724859B2 (en) 2000-10-05
CN1251073A (zh) 2000-04-19
UA42884C2 (uk) 2001-11-15
DE19705717A1 (de) 1998-08-20
CZ291781B6 (cs) 2003-05-14
BR9807364A (pt) 2000-03-14
WO1998035881A1 (fr) 1998-08-20
EP0960054B1 (fr) 2001-10-04
PL189578B1 (pl) 2005-08-31
CZ9902846A3 (cs) 2001-02-14
RO117781B1 (ro) 2002-07-30
HUP0000612A2 (en) 2000-07-28
DE19880115D2 (de) 2000-01-27
AU6390798A (en) 1998-09-08
ES2162423T3 (es) 2001-12-16
DE59801631D1 (de) 2001-11-08
CA2281705C (fr) 2008-04-01
CA2281705A1 (fr) 1998-08-20
EP0960054B2 (fr) 2005-05-04
CN1166532C (zh) 2004-09-15
JP2001511744A (ja) 2001-08-14
ATE206379T1 (de) 2001-10-15
PL335256A1 (en) 2000-04-10

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