Patent ID: 7513381

Claim:
A closure for the open mouth of a container, the closure including: a resiliently flexible diaphragm including a sealing edge with a perimeter defining a periphery of the diaphragm, the sealing edge of the diaphragm being sealable against an inside wall surface of the open mouth of the container; a cover with which the diaphragm is mounted; and a deformation mechanism, whereby the diaphragm can be deformed so as to reduce a length of the perimeter of the sealing edge of the diaphragm to break a sealing effect between the sealing edge of the diaphragm and the inside wall surface, wherein the cover comprises first and second cover sections coupled together and retaining therebetween at least part of the deformation mechanism, wherein the first and second cover sections are coupled together by first and second separate mechanical connections, and wherein the first mechanical connection is formed by fitting together a peripheral skirt of the first cover section and a peripheral wall of the second cover section in an overlapping arrangement.