Container closure having frangible skirt

Claim 2

A pilferproof closure of the type having a security band attached to the skirt of the closure by a series of spaced bridges in a peripheral slit line, the security band being split vertically at at least two positions, the portion of the security band between two splits being arranged to hinge outwardly during removal of the closure while remaining secured to the skirt by one or more unsevered bridges, characterized in that the portion of the security band between two adjacent vertical splits is joined to the skirt by at least one relatively strong bridge arranged at or near the middle of such portion, a relatively weak bridge in close proximity to the vertical split at each end of said portion and spaced from the strong bridge.

Claim 3

A pilferproof closure according to claim 1 further characterised in that there are a pair of strong bridges located substantially symmetrically in relation to the middle of each portion of the security band.

Claim 4

A pilferproof closure according to claim 2 further characterised in that a weak bridge is arranged between the pair of strong bridges.

Claim 5

A pilferproof closure according to claim 1 further characterized in that the splits are cut completely through the security band except for a bridge near, but spaced from, the lower end of the split, and smaller than the bridges joining the security band to the skirt of the closure.

Claim 6

A pilferproof closure of the type having a security band attached to the skirt of the closure by a series of spaced bridges in a peripheral slit line, the security band being split vertically in at least two positions, the portion of the security band between two splits being arranged to hinge outwardly during removal of the closure while remaining secured to the skirt by one or more unsevered bridges, charcterized in that the portion of the security band between two adjacent vertical splits is joined to the skirt by at least one relatively strong bridge arranged at or near the middle of such portion, a relatively weak bridge in close proximity to the vertical split at each edge of said portion and spaced from the strong bridge, and a bead formed near the upper margin of the security band, the said bead being flattened in register with each vertical slit, whereby the vertical slits may be easily formed after formation of the bead.

Claim 7

A pilferproof closure of the type having a security band attached to the skirt of the closure by a series of spaced bridges in a peripheral slit line, the security band being split vertically in at least two positions, the portion of the security band between two splits being arranged to hinge outwardly during removal of the closure while remaining secured to the skirt by one or more unsevered bridges, charcterized in that the portion of the security band between two adjacent vertical splits is joined to the skirt by at least one relatively strong bridge arranged at or near the middle of such portion, a relatively weak bridge in close proximity to the vertical split at each edge of said portion and spaced from the strong bridge, and a bead formed near the upper margin of the security band, the said bead being flattened in register with each vertical slit, whereby the vertical slits may be easily formed after formation of the bead.

Claim 8

A pilferproof closure according to claim 5 further characterised by a first band of knurling at a position close to the upper margin of the skirt, a second band of knurling at a position immediately above said peripheral slit line and a series of flats in said bead in said security band, the number of teeth in said bands of knurling and the number of flats formed in said bead bearing a whole number relationship with each other.

Claim 9

A pilferproof closure according to claim 5 further characterized in that there are a pair of strong bridges located substantially symetrically in relation to the middle of each portion of the security band.

Claim 10

A pilferproof closure according to claim 7 further characterized in that a weak bridge is arranged between the pair of strong bridges.

Claim 11

A pilferproof closure according to claim 5 further characterized in that the splits are cut completely through the security band except for a bridge near, but spaced from, the lower end of the split, and smaller than the bridges joining the security band to the skirt of the closure.