EP0637550A2 - Joint profilé pour fermeture de récipient - Google Patents

Joint profilé pour fermeture de récipient Download PDF

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Publication number
EP0637550A2
EP0637550A2 EP94305588A EP94305588A EP0637550A2 EP 0637550 A2 EP0637550 A2 EP 0637550A2 EP 94305588 A EP94305588 A EP 94305588A EP 94305588 A EP94305588 A EP 94305588A EP 0637550 A2 EP0637550 A2 EP 0637550A2
Authority
EP
European Patent Office
Prior art keywords
liner
closure
container
crown
rim
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
EP94305588A
Other languages
German (de)
English (en)
Other versions
EP0637550B1 (fr
EP0637550A3 (fr
Inventor
Nigel Thompson
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.)
Arconic Closure Systems International UK Ltd
Original Assignee
Metal Closures Ltd
MCG Closures Ltd
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 Metal Closures Ltd, MCG Closures Ltd filed Critical Metal Closures Ltd
Publication of EP0637550A2 publication Critical patent/EP0637550A2/fr
Publication of EP0637550A3 publication Critical patent/EP0637550A3/fr
Application granted granted Critical
Publication of EP0637550B1 publication Critical patent/EP0637550B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65D41/02—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
    • B65D41/045—Discs

Definitions

  • the present invention relates to a profiled liner for container closures and particularly those adapted to alleviate the problem of leakage of gas from containers under pressure.
  • FIG. 1A to 2B of the drawings accompanying this Specification closures having profiled liners for disposition upon the neck of a container are known.
  • prior art closures comprise a crown (1) with a circumferentially depending skirt (2) formed of a plastics material.
  • the outer surface of the skirt (2) is provided with a knurl (3) in order to assist gripping of the closure in use.
  • a profiled liner (4) is disposed on the underside of the crown.
  • the neck of a container (7) which is provided with a screw thread (8) and a rim (9) is provided for interengagement with this prior art closure.
  • the contact face (10) of the rim (9) is driven upwardly until it contacts the underside of the profiled liner (4).
  • the liner is formed in situ from a thermoplastic or a thermosetting material and is retained against separation prior to use within the closure by means of an outer annular rib (14) which acts to retain the profiled liner within the closure and to provide a reservoir of material for sealing purposes against the contact face (10) of the rim (9).
  • Closures of this prior art type may be utilised with plastics or glass containers which are almost always moulded.
  • the glass or plastics rim (9) is normally moulded to close tolerances, inevitably some moulded products have discontinuities in their external face and accordingly leakage paths (12), as shown in Figure 1B, allow gas under pressure to escape from containers, e.g. bottles, such as those used for carbonated beverages, particularly if returned for reuse. This happens, for example, particularly when the ambient temperature is raised.
  • the liner material is comparatively hard and this contributes to the possibility that leakage paths (12) will be formed in the event that the container rim is damaged.
  • the invention is to be found in Figures 4A to 7B and provides a pair of juxtaposed, symmetric or asymmetric, concentric ribs downwardly depending from the liner (4); these have the effect of alleviating the problems described above in respect of the prior art closures.
  • a liner for a container closure for disposition upon a neck of the container, said closure comprising a crown and peripheral depending skirt, which liner is formed of a resilient material retained on the underside of the crown, the liner being provided on its downwardly directed face with a pair of radially spaced annular ribs for cooperation with the rim of the container neck with which it is intended to utilise the closure.
  • the radially inner of said ribs is provided with an unsupported inclined plane.
  • the invention is characterised in that the liner at its intended point of contact with the rim of the container neck, is provided with a pair of concentric annular ribs for contract with said rim, disposed adjacent each other, the juxtaposed faces of said annular ribs exceeding in width the contact surface of the rim of the intended container neck, with the proviso that the radially inner of said ribs does not comprise an unsupported inclined plane.
  • Most preferably juxtaposed faces of unsupported ribs have mutually asymmetric surfaces whereby, for example, the outer rib surface maybe an inclined plane and the inner rib surface may be convex.
  • the juxtaposed faces of the ribs may be spaced apart at their point of juncture with the liner; said space being adjusted to accommodate the width of the container neck with which the closure is to be used.
  • the ribs when supported may be symmetric or asymmetric and it is desirable that the configuration of the support is formed with the crown to be generally of the same transverse cross section, although smaller, than the sealing rib it supports. Thus it may be asymmetric with an inclined plane or a symmetric convex annulus for example.
  • supported as used herein relates to the effect of a downwardly depending formation on the under side of the crown.
  • This formation may have a cross section which is the same as, or as different from, the configuration of the rib.
  • a notional median line of the intended container neck passes in use through, or immediately adjacent, the point of a juncture of the juxtaposed face of the outer rib with the liner.
  • the liner may be formed in situ on the underside of the crown, or maybe a loose liner disposed in the container closure prior to use, and optionally secured to the underside of the crown adhesively.
  • Container closures containing liners in accordance to the present invention may be provided on the inner face of the skirt adjacent the crown with a radially inwardly directed projection adapted to retain the liner in situ against the underside of the rim.
  • Such a radial projection is preferably configured to retain the distal surface of the outer annular rib of the liner in close abutment therewith.
  • the configuration of the radial projection and the distal surface of the outer rib of the liner are preferably arranged to be mutually interengaging.
  • the distal surface of the liner's outer rib conjoins the closure's radial projection at the point at which the distal surface of the outer rib also conjoins a planar contact surface of the rib.
  • the underside of the crown is provided with a downwardly directed annulus in register with an annular rib of the profiled liner; preferably the inner concentric annular rib.
  • the crown is provided with two concentric radially spaced annuli in register with each of said ribs respectively.
  • a method of forming a profiled liner in situ within a container closure comprises; disposing sufficient of a plastics formable material on the underside of the crown of the closure; applying a shaped platen to said plastics material or a predetermined temperature and pressure to so formed assembly and then withdrawing said platen; whereby the platen has an obverse configuration to that of the liner to provide a configuration as defined above.
  • Such a method is particularly effective where at least one of the sealing ribs is supported by an annulus downwardly depending from the crown.
  • the invention may also comprise a container closure and liner assembly, said closure being adapted for disposition upon the neck of the container and comprising a crown and a peripherally depending skirt, said liner being formed of a resilient material retained on the underside of the crown and being provided on its downwardly directed face with at least one annular sealing rib for cooperation with the rim of the container; characterised in that the underside of the crown is provided with at least one downwardly depending formation in register with said annular sealing rib thereby to support the same in use.
  • the arrangements shown in Figures 4A to 5B provide a crown portion formed of a plastics material (1) with a peripheral depending skirt (2), said peripheral depending skirt being provided with a plurality of vertically extending knurls (3) to assist gripping of the closure.
  • the closure is formed with an inwardly directed radial projection (5) spaced downwardly of the crown (1) to locate the liner (4).
  • the closure Figures 4A to 5B is adapted for cooperation with the neck of a container (7) which neck is provided with a screw thread portion (8) to its exterior, and with a rim (9) adapted to be forced into contact with the profiled liner (4) by operation of the screw thread (8).
  • a notional median line (11) is shown in Figure 4A for purposes to be elucidated later.
  • the rim (9) is provided with a contact surface (10) which should be as smooth and entire as possible having regard to the usual moulding constraints.
  • the rim (9) may be formed of glass, but the invention is particularly effective on plastics beverage containers, for example those formed of PET.
  • FIG. 4A and 4B resides in the utilisation of a profiled liner (4) provided with an outer concentric rib (19) of an asymmetric inclined plane configuration, and an inner concentric rib (20) of a generally symmetric convex configuration.
  • Each of the ribs (19) and (20) is provided with a juxtaposed face (21), the juxtaposed face of the outer concentric rib being, in this case inclined and planar, whereas the juxtaposed face of the inner concentric rib (21) is convex.
  • the juxtaposed faces (21) are spaced apart by means of a radially spaced portion (22) which may be adjusted to accommodate various widths of container neck (7).
  • the median line (11) although it notionally passes in use through the spaced portion (22) does so in this instance immediately adjacent the point of juncture of the planar juxtaposed face (21) and the spaced portion (22).
  • This arrangement taken with the planar configuration tends to increase the inwardly directed force on the contact surface (10) of the container rim (9) for the purpose of reducing the possibility of leakage paths (12) forming.
  • the arrangement is shown in its assembled condition in Figure 4B, wherein the container neck (9) has deformed the juxtaposed surfaces (21) of the profiled liner (4) and the spaced portion (22) such that the liner is moulded about the neck of the container thereby reducing significantly the chances of formation of leakage paths (12).
  • the liner material is made from a polyolefin/synthetic rubber admixture with a Shore hardness of 55 to 95 or preferably 58 to 75.
  • FIGS 5A, 5B, 6A and 6B A similar arrangement is shown in Figures 5A, 5B, 6A and 6B the only differences being the provision of a symmetric annular rib support (13) on the underside of the crown (1) of the container closure and/or an outer asymmetric/symmetric rib support (25) as shown in Figures 6A and 6B.
  • the outer rib may be as shown with a generally V-shaped configuration, or may be convex as seen from the underside of the crown.
  • the transverse cross-sectional shape of either the inner or outer rib may be asymmetric, e.g. may comprise a planar portion and a convex portion.
  • the juxtaposed surfaces are envisaged to be both symmetrical and asymmetrical; the precise configuration and width of the spacer portion (22) is selected having regard to the particular requirements of the container closure, its width and the material from which the liner is formed.
  • the liner is formed of a plastics material selected from non-p.v.c. plastisols conventional in the art.
  • Figures 7A and 7B show an arrangement similar to that shown in Figures 4A and 4B wherein the radially outer rib (19) is specially formed such that the inclined plane is formed with a related part (26) of an L-shape in cross section, such that the radially outboard end of the inclined plane (21) remains. This allows a more effective sealing about the outer rim (9) of the container.
  • the invention relates therefore to a liner whether loose or formed in situ and configured as above described, to a closure member containing such a liner, and a method for the production of such a profiled liner utilising a platen as hereinbefore described.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
EP94305588A 1993-08-05 1994-07-28 Fermeture de récipient avec joint profilé Expired - Lifetime EP0637550B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB939316264A GB9316264D0 (en) 1993-08-05 1993-08-05 Container closure with liner
GB9316264 1993-08-05

Publications (3)

Publication Number Publication Date
EP0637550A2 true EP0637550A2 (fr) 1995-02-08
EP0637550A3 EP0637550A3 (fr) 1995-07-19
EP0637550B1 EP0637550B1 (fr) 1999-10-27

Family

ID=10740030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94305588A Expired - Lifetime EP0637550B1 (fr) 1993-08-05 1994-07-28 Fermeture de récipient avec joint profilé

Country Status (7)

Country Link
EP (1) EP0637550B1 (fr)
AT (1) ATE186033T1 (fr)
DE (1) DE69421344T2 (fr)
DK (1) DK0637550T3 (fr)
ES (1) ES2138044T3 (fr)
GB (1) GB9316264D0 (fr)
GR (1) GR3032125T3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997031834A1 (fr) * 1996-03-01 1997-09-04 Alplast S.P.A. Capuchon filete en matiere plastique
EP0900742A1 (fr) * 1997-08-04 1999-03-10 Weiss K.G. Capuchon à vis en matière plastique
EP0931728A1 (fr) * 1998-01-27 1999-07-28 Rical Capsule de bouchage à vis pour un goulot de bouteille
FR2783240A1 (fr) 1998-09-16 2000-03-17 Novembal Sa Bouchon avec joint d'etancheite, procede de realisation d'un tel bouchon et ensemble comprenant un recipient et le dit bouchon avec joint d'etancheite
EP1683731A1 (fr) * 2005-01-19 2006-07-26 Rieke Corporation Disque d'étanchéité pour une fermeture, fermeture et récipient munis dudit disque
US20110220651A1 (en) * 2007-08-01 2011-09-15 Hee Kwon Rho Closure of vessel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4308965A (en) * 1979-10-24 1982-01-05 Sun Coast Plastic Closures, Inc. Unitary cap of two dissimilar materials
WO1985000153A1 (fr) * 1983-06-23 1985-01-17 Bev-Cap Plastics Pty. Ltd. Fermeture composite
US5060818A (en) * 1988-08-08 1991-10-29 Japan Crown Cork Co., Ltd. Heat-resistant liner-provided vessel closure and process for preparation thereof
DE9214073U1 (de) * 1992-10-09 1992-12-17 Hertrampf, Michael, Dr., 3007 Gehrden Verschluß für eine Flasche o.dgl.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4308965A (en) * 1979-10-24 1982-01-05 Sun Coast Plastic Closures, Inc. Unitary cap of two dissimilar materials
WO1985000153A1 (fr) * 1983-06-23 1985-01-17 Bev-Cap Plastics Pty. Ltd. Fermeture composite
US5060818A (en) * 1988-08-08 1991-10-29 Japan Crown Cork Co., Ltd. Heat-resistant liner-provided vessel closure and process for preparation thereof
DE9214073U1 (de) * 1992-10-09 1992-12-17 Hertrampf, Michael, Dr., 3007 Gehrden Verschluß für eine Flasche o.dgl.

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997031834A1 (fr) * 1996-03-01 1997-09-04 Alplast S.P.A. Capuchon filete en matiere plastique
EP0900742A1 (fr) * 1997-08-04 1999-03-10 Weiss K.G. Capuchon à vis en matière plastique
EP0931728A1 (fr) * 1998-01-27 1999-07-28 Rical Capsule de bouchage à vis pour un goulot de bouteille
FR2783240A1 (fr) 1998-09-16 2000-03-17 Novembal Sa Bouchon avec joint d'etancheite, procede de realisation d'un tel bouchon et ensemble comprenant un recipient et le dit bouchon avec joint d'etancheite
EP0987187A1 (fr) 1998-09-16 2000-03-22 Novembal (Société Anonyme) Bouchon avec joint d'étanchéité, procédé de réalisation d'un tel bouchon et ensemble comprenant un récipient et le dit bouchon avec joint d'étanchéité
WO2000015517A1 (fr) 1998-09-16 2000-03-23 Novembal Bouchon avec joint d'etancheite
EP1683731A1 (fr) * 2005-01-19 2006-07-26 Rieke Corporation Disque d'étanchéité pour une fermeture, fermeture et récipient munis dudit disque
US20110220651A1 (en) * 2007-08-01 2011-09-15 Hee Kwon Rho Closure of vessel

Also Published As

Publication number Publication date
DE69421344T2 (de) 2000-03-30
ES2138044T3 (es) 2000-01-01
ATE186033T1 (de) 1999-11-15
GR3032125T3 (en) 2000-04-27
GB9316264D0 (en) 1993-09-22
EP0637550B1 (fr) 1999-10-27
EP0637550A3 (fr) 1995-07-19
DK0637550T3 (da) 2000-03-06
DE69421344D1 (de) 1999-12-02

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