Patent ID: 6471082
Filing Date: 2002-10-29
Classification: B65D,Y10T

Abstract:
A closure adapted to be removably seated within an opening of a container for selective access to materials within the container, said closure comprising:an annular sidewall adapted to be removably received within a container opening, the annular sidewall having an annular flange integrally molded with said sidewall, said flange extending radially outwardly, substantially perpendicular to said sidewall; and a base wall integrally molded said sidewall to extend across said closure, said base wall having a top side and an underside, and further having a downwardly depending annular flange integrally formed on said underside of said base wall, and including a substantially annular, outer, planar portion having a first material thickness and a center, planar portion disposed within said annular, outer, planar portion, said center portion having a second material thickness less than the thickness of said outer portion, and wherein said center portion is deformable upon exposure to elevated temperatures and pressures to allow escape of fluid through said base wall of said closure.