GB2131774A - Improvements relating to closures for bottles and other containers - Google Patents

Improvements relating to closures for bottles and other containers Download PDF

Info

Publication number
GB2131774A
GB2131774A GB8332572A GB8332572A GB2131774A GB 2131774 A GB2131774 A GB 2131774A GB 8332572 A GB8332572 A GB 8332572A GB 8332572 A GB8332572 A GB 8332572A GB 2131774 A GB2131774 A GB 2131774A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
top
closure
sealing
skirt
formed
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
GB8332572A
Other versions
GB8332572D0 (en )
GB2131774B (en )
Inventor
Peter Reginald Haines
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
Arconic Closure Systems International UK 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

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D41/00Caps, 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
    • B65D41/02Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04Threaded or like caps or cap-like covers secured by rotation
    • B65D41/0407Threaded or like caps or cap-like covers secured by rotation with integral sealing means
    • B65D41/0428Threaded 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

Abstract

A closure for a bottle or other container is moulded in one piece from a flexible resilient plastics material and has a sealing fin 14 which extends from the region of the junction between the top and the skirt and which is inclined radially inward and away from the top 10. The underside of the sealing fin is formed with sealing ribs 15 which are of triangular section. Above the screw- thread ridge 12 in the internal surface of the skirt a shoulder 20 is formed and its radially inwardly facing surface is formed with sealing ribs 21 for engaging the cylindrical surface of the neck of the container above its screw- thread. Further sealing ribs 22 are formed between the shoulder 20 and the root of the sealing fin 14. A groove 24 confines inward or outward doming of top 10 to the central area thereof. <IMAGE>

Description

SPECIFICATION Improvements relating to closures for bottles and other containers This invention relates to closures for containers and has a particularly useful but not exclusive application in closures for bottles intended to contain carbonated or still beverages.

According to this invention there is provided a container closure moulded from a resilient plastics material and having a top, a depending peripheral skirt, and a flexible annular sealing fin extending from the region of the junction between the top and the skirt and inclined radially inward and away from the top, said fin having on its lower surface a plurality of annular sealing ribs, and the portions of the underside of the top axially aligned with the sealing fin being continuous and substantially planar.

The sealing fin may extend from said junction, or from either the top or the skirt at a location adjacent said junction. If the container on which the closure is to be used is to hold carbonated liquids, and the sealing fin extend-either from the junction or from the top of the closure the annular groove may be provided on the underside of the top at a location radially inward of the root portion of the sealing fin so as to localise doming of the top under the pressure within the container substantially to the area enclosed by the annular groove.In this way any tendency for the root of the fin to be lifted due to doming of the top and any consequent loss of sealing pressure between the fin and the top of the container are reduced such an annular groove can similarly be employed where the container is a vacuum container to mitigate any adverse effects on the seal resulting from inward doming of top due to the vacuum within the container.

In one arrangement according to the invention, the radially inner surface of the skirt is formed with a screw-threaded ridge and an annular portion of the skirt above the ridge extends radially inward beyond the screw-thread ridge for forming a seal with the container neck. Preferably this annular portion of the skirt is formed with one or more inwardly projecting annular sealing ribs. Where the sealing fin depends from the top of the closure, the portions of the underside of the top between the root of the sealing fin and said annular portion of the skirt above the screwthread ridge are formed with annular sealing ribs.

One embodiment of the invention will now be described by way of example with reference to the accompanying drawing which shows a sectional view of a closure according to the invention.

Referring to the drawing, the closure is moulded in one piece from a resilient plastics material and has a top 10 with a depending skirt 1 A screw thread ridge 12 is formed on the internal surface of the skirt, and the external surface of the skirt has serrations 1 3 to provide improved manual grip.

A flexible annular sealing fin 14 extends from the underside of the top adjacent its junction with the skirt and is inclined downwardly and radially inwardly. The underside of the fin is formed with triangular-section ribs 1 5 and a V-section groove 1 6 is defined between each pair of adjoining ribs.

The radially inwardly facing wall 1 7 of these grooves is inclined inwardly and upwardly at a small angle of approximately 10 to the central axis of the closure.

A shoulder 20 is formed on the internal surface of the skirt above the screw-thread and extends up to the junction with the top. The radially-inwardly facing surface of the shoulder has annular triangular-section sealing ribs 21 which project inward beyond the screw-thread ridge 12 for the purpose of making sealing contact with the cylindrical surface of the neck of the bottle above its screw-thread. The part of the underside of the top between the shoulder and the root of the sealing fin is similarly provided with triangularsection sealing ribs 22.

When the closure is applied to the externally threaded neck of a bottle the top of the neck comes into sealing engagement with the ribs 1 5 on the sealing fin 14 and the ribs 21 on the shoulder 20 form a seal with the side and corner portions of the neck above the screw-thread.

Upward deflection of the fin 1 9 is limited by the top, the parts of the undersurface of which axially aligned with the fin are continuous (i.e. devoid of interruptions such as ribs and grooves) and are substantially planar.

An annular groove 24 may be formed in the underside of the top 10 at a location radially inwardly of the portions thereof which may come into contact with the sealing fin 14. Such a groove forms an annular hinge enabling upward or downward bulging of the central area of the top to take place without substantially affecting the outer portions of the top and hence the backing force afforded to the sealing fin thereby.

The neck of the bottle is formed in a multi-part mould the various parts of which are required to move relative to each other and are therefore provided with appropriate clearances, and these clearances produce flashing which interrupts the smooth curves which are desirable at the radially inner and outer edges of the top of the neck. The shape of the grooves 1 6 resulting from the undercut form of the ribs on the lower surface of the fin is thought to be particularly beneficial in providing surfaces which operate to deflect the flashing into the grooves 16 where it is accommodated and does not interfere with the formation of a gas-tight seal.

The shoulder 20 may be omitted in some cases since the friction between the ribs 21 and the bottle may increase to an unacceptable value the torque necessary to remove and/or replace the closure, and in other cases where the bottle has what is known as an extended finish i.e. where the thread extends to a point so close to the end of the neck to leave an insufficiently long cylindrical sealing surface on the bottle.

Claims (9)

1. A container closure moulded from a resilient plastics material and having a top, a depending skirt, and a flexible annular sealing fin extending from the region of the junction between the top and the skirt and inclined radially inward and away from the top, said fin having on its lower surface a plurality of annular sealing ribs, and the portions of the underside of the top axially aligned with the sealing fin being continuous and substantially planar.
2. A closure as claimed in claim 1 wherein the radially inner surface of the skirt is formed with a screw-thread ridge and an annular portion of the skirt above the ridge extends radially inward beyond the screw-thread ridge for forming a seal with the container neck.
3. A closure as claimed in claim 2, wherein said annular portion of the skirt is formed with one or more inwardly projecting annular sealing ribs.
4. A closure as claimed in any one of claims 1 to 3, wherein the sealing fin depends from the top of the closure.
5. A closure as claimed in claims 4 and 5 wherein the portions of the underside of the top between the root of the sealing fin and said annular portion of the skirt above the screwthread ridge are formed with annular sealing ribs.
6. A closure as claimed in any one of claims 1 to 5 wherein the sealing ribs are of triangular cross-section.
7. A closure as claimed in claim 6, wherein the sealing ribs on the underside of the sealing fin are adjacent each other so as to form triangular section grooves between adjoining ribs, the radially outer walls of which grooves are inclined towards the top of the closure.
8. A closure as claimed in any one of claims 1 to 7, wherein an annular groove is formed on the underside of the top at a location radially inward of said planar portions of the top.
9. A container closure substantially as hereinbefore described with reference to and as illustrated in the accompanying drawing.
GB8332572A 1982-12-14 1983-12-07 Improvements relating to closures for bottles and other containers Expired GB2131774B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB8235539 1982-12-14
GB8332572A GB2131774B (en) 1982-12-14 1983-12-07 Improvements relating to closures for bottles and other containers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8332572A GB2131774B (en) 1982-12-14 1983-12-07 Improvements relating to closures for bottles and other containers

Publications (3)

Publication Number Publication Date
GB8332572D0 true GB8332572D0 (en) 1984-01-11
GB2131774A true true GB2131774A (en) 1984-06-27
GB2131774B GB2131774B (en) 1986-01-15

Family

ID=26284677

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8332572A Expired GB2131774B (en) 1982-12-14 1983-12-07 Improvements relating to closures for bottles and other containers

Country Status (1)

Country Link
GB (1) GB2131774B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5423444A (en) * 1988-06-17 1995-06-13 Mk Plastics Pty Ltd. Linerless closure for carbonated beverage container
US5638972A (en) * 1988-06-17 1997-06-17 Druitt; Rodney Malcolm Linerless closure for carbonated beverage container
GB2429971A (en) * 2005-09-12 2007-03-14 Ecocap Ltd Closure with projection having an angled sealing surface
GB2432360A (en) * 2005-11-25 2007-05-23 Beeson & Sons Ltd Jaw seals for container closure assemblies
US7651004B2 (en) 2005-05-12 2010-01-26 Rexam Closure Systems Inc. Linerless closure and package
GB2467355A (en) * 2009-01-30 2010-08-04 Beeson & Sons Ltd Container closure with pressure seal

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB904908A (en) * 1958-04-24 1962-09-05 Alrik Civer Lindstrom Improvements in or relating to closures
GB970531A (en) * 1963-09-13 1964-09-23 William Hartill Improved closure member for bottles
GB1547854A (en) * 1975-04-07 1979-06-27 Freda T Closure cap particulary for containers having a screwthreaded nack
GB1547712A (en) * 1976-01-28 1979-06-27 Nauvelle De Bouchons Plastique Screw caps for containers
GB2120219A (en) * 1982-05-17 1983-11-30 Metal Closures Group Plc Containers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB904908A (en) * 1958-04-24 1962-09-05 Alrik Civer Lindstrom Improvements in or relating to closures
GB970531A (en) * 1963-09-13 1964-09-23 William Hartill Improved closure member for bottles
GB1547854A (en) * 1975-04-07 1979-06-27 Freda T Closure cap particulary for containers having a screwthreaded nack
GB1547712A (en) * 1976-01-28 1979-06-27 Nauvelle De Bouchons Plastique Screw caps for containers
GB2120219A (en) * 1982-05-17 1983-11-30 Metal Closures Group Plc Containers

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5423444A (en) * 1988-06-17 1995-06-13 Mk Plastics Pty Ltd. Linerless closure for carbonated beverage container
US5638972A (en) * 1988-06-17 1997-06-17 Druitt; Rodney Malcolm Linerless closure for carbonated beverage container
US5836464A (en) * 1988-06-17 1998-11-17 Closures And Packaging Services Limited Closure for beverage container
US7651004B2 (en) 2005-05-12 2010-01-26 Rexam Closure Systems Inc. Linerless closure and package
GB2429971A (en) * 2005-09-12 2007-03-14 Ecocap Ltd Closure with projection having an angled sealing surface
GB2430930A (en) * 2005-09-12 2007-04-11 Ecocap Ltd Closure with a projection having an angled surface
GB2432360A (en) * 2005-11-25 2007-05-23 Beeson & Sons Ltd Jaw seals for container closure assemblies
GB2467355A (en) * 2009-01-30 2010-08-04 Beeson & Sons Ltd Container closure with pressure seal
WO2010086609A1 (en) 2009-01-30 2010-08-05 Beeson And Sons Limited Container closure assembly with pressure seal

Also Published As

Publication number Publication date Type
GB8332572D0 (en) 1984-01-11 application
GB2131774B (en) 1986-01-15 grant

Similar Documents

Publication Publication Date Title
US3572413A (en) Container and snap-on cover
US3568871A (en) Closure cap
US3612325A (en) Plastic screwcap with rotatable washer
US3323671A (en) Container closure with hinged cover portion
US3189072A (en) Container outlet and closure therefor
US3255907A (en) Linerless screw closure for containers
US3223269A (en) Snap-on closure
US3203576A (en) Container closure
US2969887A (en) Threaded pouring lip stopper combination for vacuum bottle
US3463340A (en) Screw cap with locking means
US3203571A (en) Self sealing cap construction
US5794803A (en) Child-resistant measuring cup closure and dispensing container
US3815771A (en) Linerless closure cap
US5785196A (en) Closure for a pressurized container
US6338414B1 (en) Plastic closing cap with a separable safety seal and inner seal
US4640435A (en) Plastic closure for beverage container
US4310101A (en) Combined bottle and screw cap assembly
US7134565B1 (en) Closure having band with internal thread formed by impression
US4997097A (en) Screw closure for bottles with venting means
US4699285A (en) Closure device for bottles comprising a screwable cap
US3227332A (en) Captive closure
US3489307A (en) Screw-type cap having fulcrum seal
US3286866A (en) Plastic cap
US4407422A (en) Composite closure
US6299005B1 (en) Closure

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee