Patent ID: 7306108

Claim:
A closure device, comprising: a top wall; a skirt depending from the top wall, the skirt having an inner wall; a plurality of pads arranged circumferentially on the top wall, the pads extending into a space formed by the top wall and the skirt, the space being generally cylindrical with a central axis extending generally parallel to the skirt and generally perpendicular to the top wall, the pads having a first surface extending generally parallel to the axis for abutting an outer edge of a liner and a second surface having a first portion generally perpendicular to the first surface and configured to engage a face of an outer punch of a liner-molding device during compression of the liner material against the top wall by an axially movable inner punch of the liner-molding device and a second portion forming a transition with the inner wall of the skirt, and spaces between the pads, the spaces being of a size sufficient to vent gas that would be trapped between the top wall and a liner-molding device during molding of a liner material against the top wall.