Tamper indicating closure

Details Tamper indicating closure Tamper indicating closure

B - Operations, Transporting

65

D

B65D 41/34 (2006.01) B26D 9/00 (2006.01) B26F 1/18 (2006.01) B26F 1/20 (2006.01)

Patent

CA 2103108

TAMPER INDICATING CLOSURE Abstract of the Disclosure 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. The band includes portions adapted to engage an annular bead on the container. The bridges are formed by using a primary knife having an interrupted cutting edge to produce a circumferential score in the side wall of the closure leaving spaced connectors or bridges followed by using a secondary knife having a continuous cutting edge 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.

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