CLOSURES FOR CONTAINERS

摘要

A line of weakening (24) formed of spaced bridges (44) separated by slits (42) is formed in the skirt of a temperevident closure after the closure has been moulded. The line of weakening (24) is formed by a cutting operation using a knife blade (32) along the edge of which the closure is rolled without slipping. During the operation the snap-engagement band (20) of the closure is held in contact with the interior face of the skirt in transverse alignment with the knife blade (34) and the location of the line of weakening (24).