Hermetically seamed composite container - has metal ends and fibre composition body joined by double seams

摘要

The hermetically sealed composite container is formed by double-seaming a pair of compounded metal ends (16) to extended flanges (22) having a length of at least 0.075 in. on the opposite ends of a can body. The compound (34) is bonded to an inner liner (20) on the can body to provide an effective seal. The compound material is placed in the seaming panel (30) and curl area (32) of the metal ends so as to provide a more extensive seal area when the metal ends are double-seamed with the extended flanges on the can body. The extended length flanges provide a considerably greater contact area between the can body inner liner and the metal ends when the metal ends are double-seamed to the can body.