Reclosable beverage can closure with improved pressure seal

摘要

A beverage can closure assembly with an improved pressure seal includes an insert (8) hermetically installed in the can top (2), and a closure (4) comprising a plug (14) received in an aperture in the insert. A plate portion of the closure, above the plug, has an outwardly extending rim whose lower surface abuts the top of the insert when the plug is screwed into the insert. A good seal is obtained by providing a groove (15) in the bottom surface of the rim and a complementary bead on the insert, around the aperture. The bead has an interference fit in the groove when the plug is secured in the insert.