US 7,922,018 B2 · Bottle closure with improved thread

Abstract

A closure, embodied to cooperate with a neck of a container, the neck, having a wide mouth on the upper part thereof, an external thread and a tapering piece on the lateral wall, for sealing the closure which includes a) an external body having an external head and skirt, b) an insert, enclosed within the body and fixed thereto, including an internal head and skirt, provided with an internal thread, for cooperation with the external thread of the neck and c) a sealing joint, forming an inset piece, fixed to the insert. The joint has a central piece and a border piece. The insert includes a radial compression element, for the sealing joint against the neck, such that when the bottle closure is screwed to the neck, the border is compressed radially between the insert and the neck.

Drawings

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Drawings

Claims15

Dependent claims

A screw closing cap, designed to cooperate with a neck of a receptacle, said neck forming a mouth lip on an upper part and comprising an outer thread on a sidewall and a recessed part on which said cap will be crimped, said cap comprising:

an outer shell,
an insert, said insert being contained in said outer shell and being fixed to said outer shell and comprising an inner head forming a bottom of said insert and an inner skirt provided with an inner thread that cooperates with the outer thread of said neck, and
a seal forming an add-on part fixed to said insert, said seal comprising a central part and a peripheral edge, wherein
said inner skirt comprises a circular tab that is axial spaced from said inner head, so as to form an annular groove with an axial height equal to at least a thickness of said seal, said annular groove being limited at a top part by said circular tab and at a lower part by said thread,
a diameter of said seal is such that said peripheral edge cooperates with said annular groove, said seal having annular overlap areas with said tab, so that said seal remains fixed to said insert before said cap is screwed onto said neck, or after said cap is unscrewed from said neck,
said circular tab has a flexible radial end and a radial width such that, when said cap is screwed onto said neck, said flexible radial end of the said circular tab and said peripheral edge of said seal simultaneously bend from positions that are substantially parallel to each other, said circular tab applying a radial compression on said peripheral edge, so as to apply said peripheral edge in contact with said neck, forming an overlap area inclined at more than 45° from the horizontal between said peripheral edge and said flexible radial end, thus sealing said cap screwed to said neck.

3 more elements

Dependencies are inferred from the claim text.

Description4,686 words

Summary761 words

#The invention relates to the domain of metal closing caps with plastic inserts, typically designed for closing bottles with screw caps.

#A number of closing caps with metal shells and plastic inserts are already known, the metal shell being used for capping by crimping the cap onto the threaded glass ring, and the threaded insert performing the cap open-close function by screwing—unscrewing the cap, and creating the leak tight closing seal.

#Thus, the applicant's patents include: French patent No. 2 763 046 that discloses a means of fixing the insert to the metal shell, French patent No. 2 792 617 that discloses composite closing caps in which the appearance of the cap can be modified by keeping the same insert and therefore without needing to modify the technical functions of the cap, French patent No. 2 793 216 that discloses composite closing caps with an add-on seal, French patent No. 2 803 827 that discloses closing caps with a thin insert.

Brief description of the drawings15 figures

#All figures are related to the invention.

#FIG. 1a is a view of an axial section of an insert (3) without its seal (4).

#FIG. 1b is an enlarged view of part of the insert in FIG. 1a (part at the top left).

Detailed description3,203 words

#According to the invention, so as to form the said radial compression means (6):

#a) the said inner skirt (31) may comprise a circular tab (32) with an axial spacing equal to h1 from the said inner head (30) forming the bottom of the said insert, the said distance h1 typically varying from 0.5 mm to 5 mm, so as to form an annular groove (35) with an axial height equal to at least the thickness e of the said seal (4), the said annular groove (35) being limited at its top part by the said tab (32) and at its lower part typically by the said thread (33), the said tab (32) having a radial width 1 typically varying from 0.2 mm to 2 mm,

#b) the diameter of the said seal (4) may be chosen such that the said edge (41) is capable of cooperating with the said annular groove (35), the said seal (4) having an annular overlap area with the said tab and typically with the said thread called the upper area and the lower area respectively, so that the said seal (4) remains fixed to the said insert (3) before the said cap (1) is screwed onto the said neck (5), or after the said cap (1) is unscrewed from the said neck (5),

Facts

Application

10/561,818Filed 23 Jun 2004

Priority

FR 03 0761024 Jun 2003

Published

US 2007/0095782 A13 May 2007

Granted

12 Apr 2011

Term ends

18 Oct 2027

Estimated · how

20 years from earliest known nonprovisional domestic filing plus recorded patent term adjustment, including 1,212 days of adjustment. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination.

Classification4 codes

B65D 41/045
With separate sealing elements: discs
Y10S 215/01
Bottles and jars: fins
B65D
Containers for storage or transport of articles or materials
Y10S
Technical subjects covered by former uspc cross-reference art collections [xracs] and digests

Timeline

24 Jun 2003Priority claimedFR 03 07610
23 Jun 2004Application filedUS 10/561,818
21 Dec 2005Assigned to Alcan Packaging Capsulesassignment of assignor's interest
3 May 2007PublishedUS 2007/0095782 A1
5 Jan 2011Assigned to Amcor Flexibles Capsules Francechange of name
12 Apr 2011GrantedUS 7,922,018 B2
12 Oct 2026TodayWithin its term
18 Oct 2027Term endsEstimated, includes 1,212 days of adjustment

Bottle closure with improved thread

Life of this patent

Bottle closure with improved thread

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims15

Description4,686 words

Classification4 codes

Life of this patent

Drawings

Description4,686 words