公开(公告)号：US3713545A

公开(公告)日：1973-01-30

申请号：US3713545D

申请日：1971-09-14

Applicant: ALUMINUM CO OF AMERICA

Inventor： LAWRENCE K ,  MILLS J

IPC: F16K24/04 ,  B65D41/04 ,  B65D51/16 ,  B65D51/24 ,  G01S1/02 ,  G01S1/38 ,  G01S19/35 ,  H03D3/04

CPC classification number: B65D51/1661 ,  B65D41/045 ,  B65D51/1638 ,  G01S1/024 ,  G01S1/38 ,  H03D3/04

Abstract: A sheet metal container closure is provided which has a top panel and a depending skirt for affixation to a container and a sealing liner of resilient deformable material underlying the top panel of the closure for sealing against a sealing surface of the container, and further having a score line centrally located in the top panel of the closure, which score line is rupturable by excessive pressure in a container on which the closure is sealed to provide an aperture in the top panel of the closure through which a portion of the sealing liner can be forced to permit gas to escape from the container between the sealing liner and the sealing surface of the container.