Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
115 words
A safety closure comprising a cap having a screw-thread for threaded connection with the neck of a container, and at least one internal fin on the skirt of the cap engaging a projection on the container neck when the cap is turned in the unscrewing direction to prevent unscrewing until the skirt of the cap is deformed to place the said fin clear of the said projection, characterised in that the fin has a base portion integrally formed with the skirt and extending substantially radially of the skirt and an outer portion for contact with the projection on the container, the fin being capable of flexing about an elbow intermediate the base and outer portions.
Claim 2
Dependent Claim
25 words
A safety closure according to claim 1 wherein the angle formed between the base and outer portions of the fin is in the range 90-135°.
Claim 3
Dependent Claim
25 words
A safety closure according to claim 2 wherein the angle formed between the base and outer portions of the fin is in the range 100-115°.
Claim 4
Dependent Claim
22 words
A safety closure according to any of claims 1 to 3 wherein the skirt of the cap has two diametrically-opposed internal fins.
Claim 5
Dependent Claim
39 words
A safety closure according to any of claims 1 to 4 wherein the screw-thread on the cap is provided on an inner annular wall of the cap and the internal fin or fins is provided on an outer skirt.
Claim 6
Dependent Claim
36 words
A safety closure according to any of claims 1 to 5 in which a tear-band is provided at the lower end of the skirt, removal of the tear-band being necessary before the skirt can be deformed.
Claim 7
Dependent Claim
37 words
A safety closure according to claim 6 wherein the inside surface of the tear-band comprises a series of spaced axial ribs the radially-inward surfaces of which are a tight fit against an annular shoulder on the container.
Claim 8
Dependent Claim
17 words
A safety closure according to claim 7 wherein the axial ribs are connected by an arcuate membrane.
Claim 9
Dependent Claim
39 words
A safety closure according to claim 6 wherein the internal surface of the tear-band is provided with inwardly and obliquely directed teeth or ratchets which mesh with corresponding teeth or ratchets formed on an annular shoulder on the container.
Claim 10
Dependent Claim
25 words
A safety closure according to any of claims 1 to 9 wherein the lower portion of the deformable skirt is surrounded by an annular collar.
Claim 11
Dependent Claim
25 words
A safety closure according to claim 10 wherein the annular collar is an axial extension of the tear-band of any of claims 6 to 9.
Claim 12
Dependent Claim
78 words
A safety closure according to claim 1 wherein a security ring is provided at the lower end of the deformable skirt, and joined thereto by a frangible web or spaced frangible bridges, the inner wall of the security ring being provided with one or more inwardly-directed projections which act against the surface of the container such that when the closure is unscrewed from the container the web or bridges fracture and the security ring remains on the container.
Claim 13
Dependent Claim
27 words
A safety closure as claimed in claim 12 wherein the inwardly-directed projections are upwardly- and inwardly-directed spaced fins which act against an annular shoulder on the container.