Patent ID: 6761275
Filing Date: 2004-07-13
Classification: B65D

Abstract:
For a closure having threads for engaging a container, and closing an opening of the container defined by a container wall, a separate liner disc comprising:an annular seal portion including an annular side wall having an outside surface substantially parallel all around its circumference to an inside surface of said container wall for radially pressing said inside surface of the container wall to seal thereto; a convex portion closing said annular seal portion and exposed to pressure from within the container, said convex portion extending in a direction into the container and including a convex surface facing into the container; and a sealing layer applied to said outside surface of said annular side wall and to said convex surface of said convex portion continuously, said sealing layer forming a relatively thick annular seal layer covering said annular side wall and a relatively thin bottom layer covering said convex portion.