Unitary cap of two dissimilar materials

Abstract

A unitary cap of two dissimilar materials for sealing containers such as bottles or jars comprising a rigid outer closure member and a substantially resilient inner sealing member formed together as a unitary cap wherein the substantially rigid outer closure member includes a top wall and a depending annular side wall which extends over and is adapted to be secured to the neck of a container, serrations are provided on the exterior surface of the substantially rigid outer closure member for gripping purposes, and a reinforcement shoulder is located on the outer perimeter of the depending annular side wall adjacent the lower edge thereof to prevent excessive cap expansion upon application to a container and the substantially resilient inner closure member includes a base sealing element bonded or anchored to the substantially rigid closure member disposed to engage the inner and outer rim edges and/or top surface of the container to which the unitary cap is applied.

Dependencies are inferred from the claim text.