EP0983200A1 - Fermeture - Google Patents

Fermeture

Info

Publication number
EP0983200A1
EP0983200A1 EP98922929A EP98922929A EP0983200A1 EP 0983200 A1 EP0983200 A1 EP 0983200A1 EP 98922929 A EP98922929 A EP 98922929A EP 98922929 A EP98922929 A EP 98922929A EP 0983200 A1 EP0983200 A1 EP 0983200A1
Authority
EP
European Patent Office
Prior art keywords
container
closure
gasket
skirt
end panel
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.)
Withdrawn
Application number
EP98922929A
Other languages
German (de)
English (en)
Inventor
Malcolm George Collins
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.)
Crown Packaging Technology Inc
Original Assignee
Crown Cork and Seal Technologies Corp
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 Crown Cork and Seal Technologies Corp filed Critical Crown Cork and Seal Technologies Corp
Publication of EP0983200A1 publication Critical patent/EP0983200A1/fr
Withdrawn legal-status Critical Current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
    • B65D41/0435—Threaded or like caps or cap-like covers secured by rotation with separate sealing elements
    • B65D41/0457—Threaded or like caps or cap-like covers secured by rotation with separate sealing elements the sealing element covering or co-operating with the screw-thread or the like of a container neck

Definitions

  • This invention relates to closure caps, to closure/neck finish combinations, and to a method of manufacturing closure caps.
  • the invention relates to PT (Press-On/Twist-off ) closures which are designed to be applied to a container by an axial movement and removed from the container by a rotary movement .
  • a plastJsol compound is flowed into a cap to provide sealing and thread forming features.
  • the compound is injected as a viscous fluid onto the inside of the wall portion of the metal cap, which is spun in order to distribute the compound evenly.
  • the compound is then subjected to a moulding operation by means of a plug pressed into the closure to produce the desired distribution of compound.
  • the cap is then passed through an oven, the heat from which causes the compound to expand and solidify.
  • An example of this type of closure is described in US4562930.
  • a closure cap of the press-on/twist-off type comprising a shell including a skirt and an end panel, a first sealing portion adapted to form a seal between the end panel and at least the end sealing surface of a container, and a second liner portion adapted to be located between the skirt and a thread finish provided on the container, the liner portion being such that the closure may be applied to a container by an axial movement and removed from the container by a rotary movement, characterised in that the first sealing portion and the second liner portion are both provided by means of a single pre-formed gasket which is firstly moulded and subsequently secured in position within the closure.
  • the closure skirt conveniently includes an inwardly facing projection, and the pre-formed gasket is secured in position by means of this inwardly facing projection.
  • the skirt includes an inwardly facing curl at the extremity thereof, and the pre-formed gasket is crimped in position by means of the curl. This avoids the need for any adhesives, or any heat treatment of the gasket as is required with flowed-in p] astisoJ compounds.
  • the cap is provided with a tamper evident band
  • the tamper evident band is also secured into position by means of the inwardl facing projection or curl.
  • the pre-formed gasket is conveniently formed of a polymeric material having a flexural modulus of between 30 and 900 MPa, typically between 36 and 500, and ideally around 100.
  • the pre-formed gasket is preferably formed of polypropylene, although alternative materials such as polypropylene/nylon blends or even thermoplastic elastomers (TPEs) such as Santoprenes may be appropriate.
  • the pre-formed gasket is preferably such that the thread finish on the container forms complementary threads on the gasket when the closure is applied to the container.
  • the pre-formed gasket provides both the sealing function between the end panel and the end sealing surface of a neck finish, and also the thread retention function which allows the PT cap to be twisted off and also reapplied to the neck finish by the user. Whereas pre-formed gaskets have been proposed for vacuum closures, this has typically only been to carry out the sealing function in closures other than PT closures.
  • the pre-formed gasket is preferably provided with a plurality of projections adapted to be deformed by the thread finish on a container, so as to retain the impression of the complementary threads on the gasket.
  • the projections are conceivably ribs running transverse to the thread finish on the conainer, although other projections, such as pimples etc., could be envisaged.
  • the pre-formed gasket is provided with preformed thread formations, adapted to engage the thread finish on the container.
  • the preformed gasket has or rec e ives thread formations, to allow the closure to be ramped-off by the user and reapplied with a twist-on action.
  • a closure and neck finish combination wherein the neck finish has a rim and at least one helically extending thread, and the closure has a shell including a skirt and an end panel, a first sealing portion forming a seal between the end panel and at least the rim of the container, and a second liner portion located between the skirt and the at least one helically- extending thread, the liner portion being such that the closure may be applied to a container by an axial movement and removed from the container by a rotary movement, characterised in that the first sealing portion and the second liner port. ion are both provided by means of a single pre-formed gasket which is firstly moulded and subsequently secured in position within the closure.
  • a method of manufacturing a press-on/twist- off type closure comprising the steps of:- i) stamping a shell including a skirt and an end panel, ii) moulding a gasket of polymeric material, comprising a first sealing portion and a second liner portion, and iii) attaching the gasket to the shell such that the first sealing portion is adjacent the end panel to form a seal between the end panel and at least the end sealing surface of the container, and the second liner portion is adjacent the skirt such that it is adapted to be located between the skirt and the thread finish provided on the container, the liner portion being such that the closure may be applied to a container by an axial movement and removed from the container by a rotary movement.
  • the invention further resides in a method of manufacturing a press-on/twi st-off type closure comprising the steps of :- i) stamping a shell including a skirt and an end panel, ii) moulding a gasket of polymeric material comprising a first sealing portion and a second liner portion, iii) presenting the gasket to the shell such that the first sealing portion is adjacent the end panel, and a second liner portion is adjacent the skirt, and iv) forming the edge of the shell into a curl such that the polymeric gasket is crimped in position such that the first sealing portion is adapted to form a seal between the end panel and at least the end sealing surface of a container, and the second liner portion is adapted to be located between the skirt and the thread finish provided on the container, t " liner portion being such that the closure may be applied t o the container by an axial movement and removed from the container by a rotary movement.
  • Fig.l is a schematic cross sectional view of a vacuum closure in accordance with the present inventon
  • Fig.2 is a schematic cross sectional vie'-/ of the vacuum closure of Fig.l shown applied to the neck finish of a container
  • Fig.3 is a sectional- perspective view of an alternative embodiment of vacuum closure according to the present invention
  • Fig.4 is a schematic sectional He of a further alternative embodiment of vacuum closure according to the present invention.
  • Fig.5 is a schematic sectional ⁇ of an alternative embodiment of the vacuum closure of Fig.3 incorporating a tamper-evident band.
  • the vacuum closure is shown generally at 1, and comprises a metal shell 2, including an end panel 3 and a downwardly dependant skirt 4.
  • a polypropylene gasket 6 is received within the shell 2, and comprises a sealing portion 7, a thread retention portion 8, and a securing rim 9.
  • the gasket is typically formed by injection moulding.
  • the gasket 6 is applied to the shell 2, and the skirt 4 is curled over to form an inwardly facing curl 5.
  • the curl 5 traps the rim 9 and secures the gasket 6 within the shell.
  • Fig.2 shows the vacuum closure applied to the neck finish 10 of a container such as a glass jar.
  • the neck finish includes thread formations 11 and an end sealing surface 12.
  • the sealing portion 7 of the gasket 6 forms a hermetic seal between the end panel 3 and the end sealing surface 12 of the container at Area 'A'.
  • a side seal is also formed between a portion of the gasket and the neck finish at Area '--.'.
  • a lower portion of the gasket 6 cooperates with the sidewall of the neck finish at Area 'C, in order to provide a barrier to the ingress of foreign bodies such as dust, dirt and insects etc.
  • the thread retention portion 8 of the gasket is deformed by the thread format ions 11 on the neck finish so that the vacuum closure 1 can be removed from the container by the user in a "twist-off" manner.
  • the thread retaining portion 8 of the gasket 6 remains at least partially deformed by the thread formations 11, so that the closure can be reapplied to the glass jar by twisting it back on to the neck finish.
  • Suitable materials for the gasket 6 are shown in Table 1.
  • Fig.3 shows a variant to the vacuum closure of
  • Figs. 1 and 2 in which the gasket 6 is provided with pre-formed longitudinally extending ribs 13.
  • the ribs are typically 0.35 mm in radial depth as compared to an overall gasket radial thickness of 0.6 mm.
  • the thread formations 11 make indentations in the ribs 13 which allow the closure to be easily reapplied to the container, whilst ensuring that the initial opening torque necessary to remove the closu-e from the container is not excessive and typically in the range 10 - 30 Kgf-cm.
  • the ribs 13 also act as a cushion, so as to improve the abuse resistance of the closure.
  • Other forms of projections, such as pimples etc. could also be employed to retain the impression of the thread formations 11 and so as to ensure that the closure 'ramps off when twisted.
  • Fig. shows an alernative design of closure in which the gasket 6 has thread features 14 pre-formed therein, as opposed to relying on the impressions formed from the thread formation 11.
  • Fig.5 shows an embodiment in which a tamper-evident plastics band 15 is crimped under the curl 5 together with the securing ring 9 of the gasket 6.
  • the tamper- evident band 15 has weak sections (not- shown) which cause the band to break as the closure 1 is first removed from the container neck finish 10, as described in our European Patent No. 0450959B.

Landscapes

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

Abstract

L'invention se rapporte à une capsule à fermeture par pression et ouverture par dévissage. Cette capsule comporte une enveloppe (2) dotée d'une jupe (4) et d'une extrémité plane (3). Un joint d'étanchéité composé d'une seule pièce et préformé (6) est fixé à demeure à l'intérieur de l'enveloppe et remplit une double fonction, premièrement, celle d'un joint entre l'extrémité plane (3) et une surface d'obturation étanche terminale (12) située sur un contenant tel qu'un bocal en verre et, deuxièmement, celle d'une partie de maintien filetée (8) située entre la jupe (4) et la bague filetée (11) du contenant. Grâce à cette partie de maintien filetée (8), la fermeture peut d'abord être appliquée par mouvement axial puis annulée au moyen d'un mouvement rotatoire. Le joint d'étanchéité préformé est de préférence formé dans une matière polypropylène ou une matière élastomère thermoplastique présentant un module d'élasticité en flexion situé entre 30 et 900 MPa.
EP98922929A 1997-05-23 1998-05-20 Fermeture Withdrawn EP0983200A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9710538.1A GB9710538D0 (en) 1997-05-23 1997-05-23 Closure
GB9710538 1997-05-23
PCT/GB1998/001467 WO1998052833A1 (fr) 1997-05-23 1998-05-20 Fermeture

Publications (1)

Publication Number Publication Date
EP0983200A1 true EP0983200A1 (fr) 2000-03-08

Family

ID=10812857

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98922929A Withdrawn EP0983200A1 (fr) 1997-05-23 1998-05-20 Fermeture

Country Status (4)

Country Link
EP (1) EP0983200A1 (fr)
AU (1) AU7539198A (fr)
GB (1) GB9710538D0 (fr)
WO (1) WO1998052833A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2802181B1 (fr) * 1999-12-14 2002-01-18 Pechiney Emballage Alimentaire Capsule de bouchage composite
FR2803827B1 (fr) * 2000-01-13 2002-03-08 Pechiney Emballage Alimentaire Capsule de bouchage pour bague de verrerie standard
EP1155966A1 (fr) * 2000-05-16 2001-11-21 Crown Cork & Seal Technologies Corporation Insert pour fermeture
US7134565B1 (en) 2001-02-22 2006-11-14 Crown Cork & Seal Technologies Closure having band with internal thread formed by impression
DE102004038144B4 (de) 2004-07-30 2007-05-10 Silgan Holdings Inc.(n.d.Ges.d.Staates Delaware), Stamford Verschlussvorrichtung für Behälter
FR2900143B1 (fr) * 2006-04-24 2010-08-13 Alcan Packaging Capsules Procede de capsule et capsule de bouchage correspondante
RU2384409C1 (ru) * 2008-11-06 2010-03-20 Общество С Ограниченной Ответственностью "Завод Упаковочных Изделий "Токк" Способ изготовления металлопластикового или бипластикового изделия, преимущественно укупорочного колпачка для бутылки
EP3524538B1 (fr) 2018-02-12 2022-11-09 Vidrala, S.A. Récipient à ouverture facile
WO2020214128A1 (fr) * 2019-10-11 2020-10-22 Артур Артемович ХОРТИЕВ Capuchon de fermeture à visser pour bouteille de liquide
US11794450B2 (en) * 2020-12-18 2023-10-24 Altria Client Services Llc Polymer-laminated metal lid

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE790608A (fr) * 1971-10-27 1973-02-15 Anchor Hocking Corp Capuchon etanche de fermeture d'un recipient de
US4709825A (en) * 1982-09-15 1987-12-01 Owens-Illinois Closure Inc. Press-on twist-off closure for container
US4552279A (en) * 1984-09-14 1985-11-12 Owens-Illinois, Inc. Container closure
AU653334B2 (en) * 1990-04-06 1994-09-29 Carnaudmetalbox Plc Metal screw closures for packaging containers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9852833A1 *

Also Published As

Publication number Publication date
AU7539198A (en) 1998-12-11
GB9710538D0 (en) 1997-07-16
WO1998052833A1 (fr) 1998-11-26

Similar Documents

Publication Publication Date Title
EP1048585B1 (fr) Fermeture de sécurité avec arrangements d'écoulement
KR100194500B1 (ko) 플라스틱 셀과 플라스틱 라이너를 가진 용기 밀폐기
US5685443A (en) Composite closure and method of making same
US8071004B2 (en) Closure having band with internal thread formed by impression
US3991904A (en) Hinged closures
CN1080237C (zh) 显示打开过的瓶盖
CN1106991C (zh) 塑料盖
EP1055609B1 (fr) Fermeture inviolable et procédé de fabrication associé
WO1996027532A9 (fr) Fermeture composite et son procede de production
WO1998052833A1 (fr) Fermeture
IL27965A (en) Press-on turn-off closure cap
CN1367751A (zh) 在螺纹上带防逆转齿的塑料封盖
JPH08504710A (ja) インサートライナを有する閉鎖体
US4938371A (en) Closure having improved sealant channel for receiving sealant by spin lining
US20020011458A1 (en) Closure having an improved thread design
EP1155966A1 (fr) Insert pour fermeture
US6981601B2 (en) Tamper-evident snap-on closure with sealing plug and liner
WO1984000346A1 (fr) Ameliorations a des fermetures pour recipients filetes
CN219905054U (zh) 防加热拔出瓶盖的外主体与瓶颈的固定结构
CA1045078A (fr) Capuchon a scellement lateral et contenant scelle
JP4350440B2 (ja) キャップ、および該キャップと容器の組合せ
CN114476354A (zh) 容器塞子
JPH08210413A (ja) トップキャップ構造

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19991111

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20001201