GB2311283A - Cap for a container - Google Patents

Cap for a container Download PDF

Info

Publication number
GB2311283A
GB2311283A GB9605741A GB9605741A GB2311283A GB 2311283 A GB2311283 A GB 2311283A GB 9605741 A GB9605741 A GB 9605741A GB 9605741 A GB9605741 A GB 9605741A GB 2311283 A GB2311283 A GB 2311283A
Authority
GB
United Kingdom
Prior art keywords
cap
container
projection
rim
membrane
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Withdrawn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
GB9605741A
Other versions
GB9605741D0 (en
Inventor
Karl Mondszein
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.)
Amcor Specialty Cartons Americas LLC
Original Assignee
Lawson Mardon USA Inc
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 Lawson Mardon USA Inc filed Critical Lawson Mardon USA Inc
Priority to GB9605741A priority Critical patent/GB2311283A/en
Publication of GB9605741D0 publication Critical patent/GB9605741D0/en
Priority to EP97906305A priority patent/EP0889835B1/en
Priority to PCT/GB1997/000668 priority patent/WO1997034814A1/en
Priority to DE69703835T priority patent/DE69703835T2/en
Priority to ES97906305T priority patent/ES2154894T3/en
Priority to CA 2249302 priority patent/CA2249302A1/en
Publication of GB2311283A publication Critical patent/GB2311283A/en
Withdrawn legal-status Critical Current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
    • B65D41/0407—Threaded or like caps or cap-like covers secured by rotation with integral sealing means
    • B65D41/0428—Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a collar, flange, rib or the like contacting the top rim or the top edges or the external surface of a container neck
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D51/00—Closures not otherwise provided for
    • B65D51/18—Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
    • B65D51/20—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing
    • 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
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0006—Upper closure
    • B65D2251/0015—Upper closure of the 41-type
    • 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
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0068—Lower closure
    • B65D2251/0093—Membrane

Landscapes

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

Abstract

The cap comprises a one-piece plastics moulding including a skirt (12), with a screw thread (13), a top (11) and sealing means (20,30) depending from the top. The sealing means comprises an annular projection (30) and an annular sealing member (20) whose root is radially spaced from the projection. The sealing member (20) curves towards the projection (30) and, in use, is clamped between the projection and the rim (22) of a container. The cap may include support means (17) for a sealing membrane (25), which adheres to the container rim (22) with the cap engaged on the container.

Description

CAP FOR A CONTAINER The present invention relates to a cap for a container and is concerned with providing an improved seal between the cap and a container.
The invention is applicable to the type of cap in which there is means for effecting rotary disengagement with the container, usually by means of screw threads, but also, for example, by a bayonet fitting.
Caps of this type are known having an annular projection for sealingly engaging the rim of a container.
The cap of the present invention provides an improved seal and is especially useful for containing hygroscopic materials. One particular use is for a container of tea, or coffee to permit resealing of the container, with exclusion of water vapour.
One example of a prior art cap is disclosed in GB-2123392. This cap has an annular projection of triangular cross-section and, initially a frangible sealing membrane is weakly adhered in the top of the cap across the projection. The opposite side of the membrane carries an adhesive which strongly adheres to the rim of a glass jar when the cap is secured on the jar. The cap can then be removed, the membrane broken and the jar resealed by engagement of the annular projection with the container rim.
One disadvantage with this arrangement is that, once the membrane seal is broken, the resealing of the jar is insufficiently effective. Due to variations in manufacture, especially of glass jars, resealing may be poor with resultant deterioration of the contents, such as coffee.
It is, therefore, usual for a cap for a coffee jar, for example, to have a separate, resilient wad adhered in the cap. The frangible membrane is initially carried by the wad and adheres to the jar, so that, on opening of the jar, the wad separates from the membrane.
This arrangement still does not, however, provide a good seal, once the membrane has been broken, due to undulations in the rim of the jar.
Furthermore, this is an expensive addition to a coffee cap.
GB-2117360 discloses a cap which has an improved sealing arrangement for taking account of thickness tolerances in a glass jar. This document provides two radially spaced annular seals, dependent from the top of the cap. One of these seals is resiliently flexible and is curved, so that a convex face of the seal engages with the jar rim. The provision of two seals improves the probability of good overall sealing. The design, however is not suitable for supporting a frangible membrane and sealing is still unreliable, especially with glass containers.
The present invention provides a cap which provides an improved seal with a container, despite frequent removal of the cap, and is easy to manufacture at low cost.
The present invention provides a cap for a container having a skirt provided with means for effecting rotary disengagement of the cap from a container and rotary re-engagement with the container so as axially to urge an annular seal of the cap against a rim of the container, the annular seal comprising an annular projection extending inwardly from the top of the cap, and an annular, resiliently flexible, curved sealing member projecting inwardly from the cap, the sealing member curving towards the projection so as to be deflectable by engagement with the rim of a container into contact with the projection, whereby the sealing member is sealingly clamped between the rim and the annular projection.
Reference is now made to the accompanying drawings, wherein the sole figure is a cross-sectional view of a part of a cap according to the invention.
The cap shown is a one-piece injection moulding of plastics material and has a top 11 and a skirt 12. The skirt has an internal threads, or part threads, 13 for screw-engagement with threads 14 on a container, such as a glass jar 16.
The skirt also has an annular, radial inward support flange 17 between the top 11 and the threads 13.
A sealing member 20, which is an integral part of the cap moulding, projects from the top 11 of the cap. In this embodiment, the sealing member projects from a location adjacent to the skirt 12 inwardly away from the skirt, but could be radially spaced from the skirt and project towards the skirt. The sealing member is an annular projection, which is elongate in cross-section and curves, so as to present a convex surface 21 to the top of the rim 22 of the jar 16, in use. The curved surface 21 flattens at the free end part of the sealing member and lies generally in a radial plane relative to the skirt 12.
The arrangement is such that a frangible membrane 25 can be supported between the support flange 17 and the free end part of the sealing member 20. The membrane 25 has an adhesive surface opposite to the top 11 of the cap, so that, when the cap is screwed down onto a jar, the membrane adheres to the rim 22 of the jar and is resiliently urged against the rim by the sealing member 20. On removal of the cap, the support flange 17, is released from the membrane and the sealing member 20 will re-engage with the rim of the jar on re-closure.
Reliance on the sealing member alone, however, is insufficient to ensure a good seal, once the membrane 25 has been broken. There is provided an inwardly extending, annular projection 30 of triangular crosssection, integrally formed with the top 11 of the cap. The root of the projection 30 is radially spaced from the root of the sealing member 20, but the inner edge of the projection is located in axial alignment with a portion of the sealing member.
The arrangement is such that, when the cap is screwed down on the jar, the sealing member is clamped between the projection 30 and the rim of the jar. This provides a highly effective seal, which does not rely on maintenance of resilience in the sealing member.
A sealed chamber 31 is defined between the top 11 of the cap, the projection 30 and the sealing member 20, in the jar-closing position of the cap. This sealed chamber 31 provides resilience, urging the sealing member 20 into sealing engagement with the cap.
The cap provides reliable, resealability in a single plastics moulding avoiding the need for a sealing wad, while providing superior sealing to that provided by a wad.

Claims (9)

1. A cap for a container having a skirt provided with means for effecting rotary disengagement of the cap from a container and rotary reengagement with the container so as axially to urge an annular seal of the cap against a rim of the container, the annular seal comprising an annular projection extending inwardly from the top of the cap, and an annular, resiliently flexible, curved sealing member projecting inwardly from the cap, the sealing member curving towards the projection so as to be deflectable by engagement with the rim of a container into contact with the projection, whereby the sealing member is sealingly clamped between the rim and the annular projection.
2. A cap according to Claim 1, wherein the top, the skirt, the projection and the sealing member are integral parts of a one-piece plastics moulding.
3. A cap according to Claim 1 or 2, wherein a sealed annular chamber is defined between the top of the cap, the projection and the sealing member in the clamped position of the sealing member.
4. A cap according to Claim 1, 2 or 3, wherein the projection is generally of triangular cross-section.
5. A cap according to any preceding claim, wherein the skirt has circumferential, inwardly extending support means and a membrane is provided and is held by the support means, the membrane having an adhesive on its surface opposite to the top of the cap for adherence to the rim of a container, the membrane being releasable from the support means on disengagement of the cap from the container, leaving the membrane adhered to the rim.
6. A cap according to Claim 5, wherein the sealing member bears on the membrane and urges the membrane against the support means.
7. A cap according to Claim 5 or 6, wherein the support means comprises a continuous, circumferential ring.
8. A cap according to Claim 5, 6 or 7, in combination with a container on which the cap is screw-engaged, the membrane being adhered to the container rim and the sealing means urging the membrane against the rim, with the sealing means being clamped between the rim and the projection.
9. A cap for a container substantially as herein described with reference to the accompanying drawings.
GB9605741A 1996-03-19 1996-03-19 Cap for a container Withdrawn GB2311283A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB9605741A GB2311283A (en) 1996-03-19 1996-03-19 Cap for a container
EP97906305A EP0889835B1 (en) 1996-03-19 1997-03-12 Cap for a container
PCT/GB1997/000668 WO1997034814A1 (en) 1996-03-19 1997-03-12 Cap for a container
DE69703835T DE69703835T2 (en) 1996-03-19 1997-03-12 CAP FOR CONTAINERS
ES97906305T ES2154894T3 (en) 1996-03-19 1997-03-12 CLOSING COVER FOR CONTAINER.
CA 2249302 CA2249302A1 (en) 1996-03-19 1997-03-12 Cap for a container

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9605741A GB2311283A (en) 1996-03-19 1996-03-19 Cap for a container

Publications (2)

Publication Number Publication Date
GB9605741D0 GB9605741D0 (en) 1996-05-22
GB2311283A true GB2311283A (en) 1997-09-24

Family

ID=10790644

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9605741A Withdrawn GB2311283A (en) 1996-03-19 1996-03-19 Cap for a container

Country Status (6)

Country Link
EP (1) EP0889835B1 (en)
CA (1) CA2249302A1 (en)
DE (1) DE69703835T2 (en)
ES (1) ES2154894T3 (en)
GB (1) GB2311283A (en)
WO (1) WO1997034814A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003059768A1 (en) * 2002-01-16 2003-07-24 Dimitrios Pairis Plastic closing cap with sealing ring
WO2006000532A1 (en) * 2004-06-23 2006-01-05 Obrist Closures Switzerland Gmbh Wadless closure
US7830263B2 (en) 2006-04-28 2010-11-09 Obrist Closures Switzerland Gmbh Closure with RFID device
USD630093S1 (en) 2010-06-11 2011-01-04 Obrist Closures Switzerland Gmbh Closure
US8413830B2 (en) 2008-04-04 2013-04-09 Obrist Closures Switzerland Gmbh Closure
US8453856B2 (en) 2007-07-13 2013-06-04 Obrist Closures Switzerland Gmbh Tamper-evident closure
US8490804B2 (en) 2007-10-31 2013-07-23 Obrist Closures Switzerland Gmbh Closure with movable tamper-evident member
US8522991B2 (en) 2003-10-31 2013-09-03 Obrist Closures Switzerland Gmbh Tamper evident closure
US8672155B2 (en) 2006-08-01 2014-03-18 Fresenius Kabi Deutschland Gmbh Closure cap for a container filled with medicinal fluid, and container having a closure cap
US9102448B2 (en) 2007-07-13 2015-08-11 Obrist Closures Switzerland Gmbh Tamper-evident closure

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3814274A (en) * 1972-04-05 1974-06-04 Mack Wayne Plastics Co Linerless closure for a container
US4398645A (en) * 1981-06-29 1983-08-16 Thurston Toeppen Closure for pressurized containers
GB2120219A (en) * 1982-05-17 1983-11-30 Metal Closures Group Plc Containers
GB2123392A (en) * 1982-07-10 1984-02-01 Mardon Illingworth Container sealing devices and method of sealing oontainers
EP0109631A2 (en) * 1982-11-17 1984-05-30 Walter Wiedmer Thread closure of elastic material for a container
GB2148861A (en) * 1983-10-29 1985-06-05 Metal Box Plc One-piece plastics closure
GB2222821A (en) * 1988-09-20 1990-03-21 Massmould Holdings Closures for releasably sealing containers
EP0568288A1 (en) * 1992-04-27 1993-11-03 Owens-Illinois Closure Inc., Plastic container package with linerless sealing closure system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1572960A (en) * 1977-12-05 1980-08-06 Metal Closures Group Ltd Closure for containers
US4531649A (en) * 1984-04-23 1985-07-30 Anchor Hocking Corporation Molded plastic cap with sealing liner
EP0460813A3 (en) * 1990-05-25 1992-03-11 Tredegar Molded Products Company Threaded closure with integral sealing means
CA2069585C (en) * 1992-05-26 1997-03-04 Michel Painchaud Bottle assembly with improved seal

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3814274A (en) * 1972-04-05 1974-06-04 Mack Wayne Plastics Co Linerless closure for a container
US4398645A (en) * 1981-06-29 1983-08-16 Thurston Toeppen Closure for pressurized containers
GB2120219A (en) * 1982-05-17 1983-11-30 Metal Closures Group Plc Containers
GB2123392A (en) * 1982-07-10 1984-02-01 Mardon Illingworth Container sealing devices and method of sealing oontainers
EP0109631A2 (en) * 1982-11-17 1984-05-30 Walter Wiedmer Thread closure of elastic material for a container
GB2148861A (en) * 1983-10-29 1985-06-05 Metal Box Plc One-piece plastics closure
GB2222821A (en) * 1988-09-20 1990-03-21 Massmould Holdings Closures for releasably sealing containers
EP0568288A1 (en) * 1992-04-27 1993-11-03 Owens-Illinois Closure Inc., Plastic container package with linerless sealing closure system

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003059768A1 (en) * 2002-01-16 2003-07-24 Dimitrios Pairis Plastic closing cap with sealing ring
US9242768B2 (en) 2003-10-31 2016-01-26 Obrist Closures Switzerland Gmbh Tamper evident closure
US8522991B2 (en) 2003-10-31 2013-09-03 Obrist Closures Switzerland Gmbh Tamper evident closure
AU2005256602B2 (en) * 2004-06-23 2010-09-02 Obrist Closures Switzerland Gmbh Wadless closure
GB2415426B (en) * 2004-06-23 2007-05-09 Crown Packaging Technology Inc Wadless closure
WO2006000532A1 (en) * 2004-06-23 2006-01-05 Obrist Closures Switzerland Gmbh Wadless closure
US7830263B2 (en) 2006-04-28 2010-11-09 Obrist Closures Switzerland Gmbh Closure with RFID device
US8672155B2 (en) 2006-08-01 2014-03-18 Fresenius Kabi Deutschland Gmbh Closure cap for a container filled with medicinal fluid, and container having a closure cap
US8453856B2 (en) 2007-07-13 2013-06-04 Obrist Closures Switzerland Gmbh Tamper-evident closure
US9102448B2 (en) 2007-07-13 2015-08-11 Obrist Closures Switzerland Gmbh Tamper-evident closure
US8490804B2 (en) 2007-10-31 2013-07-23 Obrist Closures Switzerland Gmbh Closure with movable tamper-evident member
US8413830B2 (en) 2008-04-04 2013-04-09 Obrist Closures Switzerland Gmbh Closure
USD630093S1 (en) 2010-06-11 2011-01-04 Obrist Closures Switzerland Gmbh Closure

Also Published As

Publication number Publication date
GB9605741D0 (en) 1996-05-22
EP0889835A1 (en) 1999-01-13
EP0889835B1 (en) 2001-01-03
WO1997034814A1 (en) 1997-09-25
DE69703835D1 (en) 2001-02-08
ES2154894T3 (en) 2001-04-16
CA2249302A1 (en) 1997-09-25
DE69703835T2 (en) 2001-05-31

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)