Tamper indicating closure

摘要

A tamper indicating closure comprising a base wall and a peripheral skirt having an internal thread adapted to engage the threads of a container wherein a tamper indicating band is provided on the skirt by a plurality of circumferentially spaced bridges (29). The band includes portions adapted to engage an annular bead on the container. The bridges (29) are formed by using a primary knife (35) having an interrupted cutting edge (36) to produce a circumferential score (28) in the side wall of the closure leaving spaced connectors or bridges (29) followed by using a secondary knife (40) having a continuous cutting edge (41) to provide a continuous external score line and an accurately dimensional radial thickness of the bridges. In a preferred method and apparatus, the closures engage the successive primary and secondary knives and are moved such that the closures roll relative to the knives.