Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
151 words
A container closure moulded in one piece from a plastics material and comprising a top, a dependent skirt the radially inner surface of which is formed with a screw-thread, a surface which is flared in a direction away from the top being formed on the internal surface of the skirt where it joins the top, and an annular resiliently flexible fin extending from the underside of the top at a position spaced radially inwardly of said flared surface, said fin having an increasing diameter in a direction away from the top and having a length such as to permit at least its portion adjoining its free edge to lie against said flared surface when the fin is deformed outwardly by the top of the neck of a container to which the closure is to be applied and to extend round the outer corner portion of the neck of a co-operating container.
Claim 2
Dependent Claim
151 words
A container closure moulded in one piece from a plastics material and comprising a top, a dependent skirt the radially inner surface of which is formed with a screw-thread, a surface which is flared in a direction away from the top being formed on the internal surface of the skirt where it joins the top, and an annular resiliently flexible fin extending from the underside of the top at a position spaced radially inwardly of said flared surface, said fin having an increasing diameter in a direction away from the top and having a length such as to permit at least its portion adjoining its free edge to lie against said flared surface when the fin is deformed outwardly by the top of the neck of a container to which the closure is to be applied and to extend round the outer corner portion of the neck of a co-operating container.
Claim 3
Dependent Claim
13 words
A closure as claimed in claim 1, wherein said flared surface is conical.
Claim 4
Dependent Claim
24 words
A closure as claimed in claim 2, wherein said flared surface extends at an angle of 30° to the central axis of the closure.
Claim 5
Dependent Claim
19 words
A closure as claimed in any one of claims 1 to 3, wherein the fin is of conical form.
Claim 6
Dependent Claim
24 words
A closure as claimed in claim 4 in conjunction with claim 2 or claim 3, wherein the fin extends parallel to the flared surface.
Claim 7
Dependent Claim
28 words
A closure as claimed in any one of the preceding claims, wherein the free end portion of the fin is thicker than the main body of the fin.
Claim 8
Dependent Claim
35 words
A closure as claimed in claim 6, wherein the free end portion is thickened by reason of the provision of a peripheral rib formed locally on the radially outer surface of said free end portion.
Claim 9
Dependent Claim
23 words
A closure as claimed in any one of the preceding claims wherein the main body of the fin is of substantially uniform thickness.
Claim 10
Dependent Claim
38 words
A closure as claimed in any one of claims 1 to 7 wherein the radially inner surface has a plurality of annular grooves therein, each pair of adjacent grooves defining between them an annular rib of triangular cross-section.