Abstract This disclosure relates to a closure cap having a pilfer-proof band wherein the closure cap is formed entirely by a die punching operation, including the perforation thereof to define the pilfer-proof band. The cap is initially die formed with an intermediate shoulder formed in the skirt, after which in a simultaneous operation the upper portion of the cap body is provided with knurling and the lower portion of the cap body or skirt is sheared through the shoulder to define a circumferential line of perforation interrupted by connecting tabs. The shoulder formation is such that when severed, reinforcing curls are provided on opposite sides of the perforation. Another feature of the die is that the knurling is effected by cooperating projections on the die with certain of the projections being in the form of pins.
A closure cap having a pilfer-proof band, said closure cap including a cylindrical skirt and said band being an extension of said skirt and disposed adjacent said skirt in closely spaced relation, said band being connected to said skirt by integral circumferentially spaced tabs, said band being of a larger diameter than said skirt, adjacent edges of said skirt and said band being reinforced by integral flanges generally bridging the difference in circumference between said band and said skirt.
Claim 2
Dependent Claim
79 words
A closure cap having a pilfer-proof band, said closure cap including a cylindrical skirt and said band being an extension of said skirt and disposed adjacent said skirt in closely spaced relation, said band being connected to said skirt by integral circumferentially spaced tabs, said band being of a larger diameter than said skirt, adjacent edges of said skirt and said band being reinforced by integral flanges generally bridging the difference in circumference between said band and said skirt.
Claim 3
Dependent Claim
16 words
The closure cap of claim 1 wherein said flanges are of complementary configuration and axially spaced.
Claim 4
Dependent Claim
18 words
The closure cap of claim 2 wherein said flanges have substantially cylindrical free edges of a like diameter.
Claim 5
Dependent Claim
23 words
The closure cap of claim 1 wherein each flange is arcuate in axial section and said flanges when combined defining a reversing bend.
Claim 6
Dependent Claim
22 words
The closure cap of claim 4 wherein said flanges are axially displaced and the material of said tabs has been axially stretched.