EP1201553A2 - Capsule métallique de bouchage à insert plastique - Google Patents

Capsule métallique de bouchage à insert plastique Download PDF

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Publication number
EP1201553A2
EP1201553A2 EP01308751A EP01308751A EP1201553A2 EP 1201553 A2 EP1201553 A2 EP 1201553A2 EP 01308751 A EP01308751 A EP 01308751A EP 01308751 A EP01308751 A EP 01308751A EP 1201553 A2 EP1201553 A2 EP 1201553A2
Authority
EP
European Patent Office
Prior art keywords
closure
insert
outer shell
lower edge
closure according
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Withdrawn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
EP01308751A
Other languages
German (de)
English (en)
Other versions
EP1201553A3 (fr
Inventor
Stuart Giles
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
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 filed Critical Metal Closures Ltd
Publication of EP1201553A2 publication Critical patent/EP1201553A2/fr
Publication of EP1201553A3 publication Critical patent/EP1201553A3/fr
Withdrawn legal-status Critical Current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
    • B65D41/0457—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

  • the present invention relates to a closure for a container and it has special, though not exclusive, application to closures for bottles.
  • bottles are formed with screw threaded necks and the closure is correspondingly threaded, allowing the closure to be removed and replaced.
  • Such bottles when used to contain certain high quality/high cost products such as for example spirits, are often provided with metallic cap-like closures.
  • Such closures generally take the form of an outer metallic shell, enclosing an inner plastics insert.
  • the outer shell provides both strength to the closure as well as an attractive outer surface whereas the insert provides the profile for sealing and attaching the closure to a bottle neck.
  • a problem experienced by known closures of this type is that on attempted removal of the closure from the bottle, the outer shell can become free of the plastics insert, and "spins" when further rotational force is applied thereto.
  • the outer shell presents the only available surface for removal of the closure, it has to be damaged to allow access to the plastics insert and hence the interior of the bottle.
  • UK patent 727 529 describes a closure where an outer metal cap is curled around a lower edge of an insert. However, the outer cap requires bonding to the insert using an adhesive coating.
  • a closure for a container comprising:-
  • the lower edge portion of the insert tapers in a direction away from a crown of the closure. Tapering the lower edge portion of the insert provides an inclined surface which assists in the optimisation of the contact characteristics between the shell and the insert.
  • the outer shell is configured to wrap around a lower edge of the insert.
  • the outer shell is configured to wrap around a lower edge of the insert.
  • a lower portion of an edge of the outer shell is formed to be re-entrant into the closure. This presents an aesthetically pleasing and safe edge at the lower portion of the closure.
  • a lower portion of an edge of the outer shell forms a substantially U-shaped groove in cross-section.
  • the provision of a U-shaped groove affords a large and thus secure contact surface area between the insert and the shell.
  • the outer shell is coated with a flexible and high scratch resistant clear lacquer.
  • the lacquer is an Epoxy-Amino based product.
  • the shell is formed of an aluminium alloy.
  • a closure 1 takes the form of a cap-like member.
  • the closure comprises an outer shell 2 formed of aluminium alloy and a plastics insert 3.
  • the plastics material used for the insert is polypropylene which affords suitable stiffness and strength characteristics. Other suitable materials may be used such as polyethylene.
  • a liner 4 is seated within the closure for enhancing the sealing properties thereof.
  • the liner is formed of EPE (expanded polyethylene).
  • the insert 3 is provided with an internal threaded portion comprising ridges 10 and grooves 11, which will interengage with corresponding ridges and grooves on a bottle neck.
  • the lower edge of the outer shell 2 is formed to be re-entrant into the closure so as to make a "U" shaped groove or lip 5.
  • a lower edge portion 7 of the plastics insert 3 is provided within this groove and is clamped there in position.
  • a plurality of passages 14 are provided between the insert 3 and outer shell 2, by channels formed in the insert. These passages allow escape of air from between the shell and insert as the shell is applied over the insert.
  • the lower edge portion 7 of the plastics insert is formed by first stepping down the insert's thickness from where the threaded portion ends. This stepped down lower edge portion 7 is then tapered by providing an inclined inner surface thereon (at angle ⁇ ) towards its end 8.
  • This angle is preferably between 1 and 3° and more preferably 2 °.
  • the taper is provided so as to enhance the contact of the inner surfaces of the groove with the edge portion 7 and also to ensure that the combined thickness of the insert and outer shell at the lower edge of the closure is such so as not to interfere with the contacting ridges 10 and grooves 11 of the closure and bottle neck (shown in respect of the closure only).
  • the end 8 of the plastic insert edge 7 is spaced from the adjacent bottom inner surface 12 of the groove 5 to form a gap X. This gap ensures the corners at the bottom of the closure are aesthetically and safely radiussed.
  • the lower edge configuration shown in the Figures is formed in three main steps.
  • the outer shell 2 is placed over the plastics insert 3 with its lower edge or skirt projecting downwardly past the insert. Suitable first tooling then curls or bends the edge or skirt inwardly by 30°.
  • second tooling bends the skirt so that it projects inwardly at 90° to the axis of the closure.
  • third tooling bends the skirt round by around a further 90° so that it clamps around the lower edge portion 7 of the insert 3.
  • the skirt has in effect been bent around 180 ° at this point.
  • the thickness of the outer shell needs to be increased to around 3 mm to ensure there is sufficient material to allow for the stretching that occurs in the forming process.
  • the outer shell may in this respect be slightly thickened just in the region of the groove 5 to afford such extra material.
  • the shell By providing the lower edge portion of the insert with an inclined surface, the shell can more readily be formed into enhanced close contact with the insert without distorting the material of the shell. As a result, the extent to which the shell is re-entrant into the interior of the closure can be minimised. Further the provision of an inclined surface onto which the shell is clamped facilitates manufacture of the closure in that withdrawal of the third tooling following its forming step, is less likely to damage the closure as the aperture into which the third tooling is inserted in effect widens in its direction of withdrawal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
EP01308751A 2000-10-19 2001-10-15 Capsule métallique de bouchage à insert plastique Withdrawn EP1201553A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0025671A GB0025671D0 (en) 2000-10-19 2000-10-19 Closure
GB0025671 2000-10-19

Publications (2)

Publication Number Publication Date
EP1201553A2 true EP1201553A2 (fr) 2002-05-02
EP1201553A3 EP1201553A3 (fr) 2002-07-17

Family

ID=9901636

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01308751A Withdrawn EP1201553A3 (fr) 2000-10-19 2001-10-15 Capsule métallique de bouchage à insert plastique

Country Status (2)

Country Link
EP (1) EP1201553A3 (fr)
GB (1) GB0025671D0 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11097872B2 (en) 2017-12-29 2021-08-24 Altria Client Services Llc Composite lid of container and method of attaching metal lid to plastic lid to form composite lid of container

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB727529A (en) 1953-03-10 1955-04-06 Metal Box Co Ltd Improvements in or relating to closures for jars, bottles, or similar containers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1992181A (en) * 1932-05-13 1935-02-26 Hazel Atlas Glass Co Bottle or jar closure
US2744647A (en) * 1951-08-14 1956-05-08 Owens Illinois Glass Co Closures
US4552279A (en) * 1984-09-14 1985-11-12 Owens-Illinois, Inc. Container closure
GB9900257D0 (en) * 1999-01-08 1999-02-24 Dragon Plastics Ltd Cap

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB727529A (en) 1953-03-10 1955-04-06 Metal Box Co Ltd Improvements in or relating to closures for jars, bottles, or similar containers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11097872B2 (en) 2017-12-29 2021-08-24 Altria Client Services Llc Composite lid of container and method of attaching metal lid to plastic lid to form composite lid of container

Also Published As

Publication number Publication date
GB0025671D0 (en) 2000-12-06
EP1201553A3 (fr) 2002-07-17

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