Toyo Seikan Kaisha, Ltd.

Koichi Doi

Fumio Mori

Isao Ichinose

Tetsuomi Ogimoto

Katsuhiko Kitakawa

A container closure for use in packaging flowable materials is disclosed comprising a closure shell, a peelable thermoplastic liner disposed on the inner surface of the shell and having a thick periphery and a comparatively thin central portion with a demarcated peeling tab extending to the periphery of the liner, and at least one adhesive interfacial layer separating the liner from and peelably bonding said liner to the shell and having a non-adhesive or weakly adhesive zone underlying and corresponding to the periphery of the liner and a relatively strongly adhesive zone underlying and corresponding to the central portion of the liner.

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Inuyama, Japan

Koichi Doi