Showa Denko K.k.

Showa Denko Kabushiki Kaisha

Nissei Plastic Industrial Co., Ltd.

Wasuke Sato

Yoshihiko Yuzawa

Fumio Iriko

Setsuyuki Takeuchi

Nobukuni Ibe

A lid for a can-shaped container which lid is adapted to be connected to a peripheral wall of the can-shaped container is disclosed which comprises a can-shaped container lid base having a gas barrier-type multi-layer base, a thermoplastic resin layer, a score portion formed by thinning part of the thermoplastic resin layer on the upper surface of the bottom of the base into an annular shape; and a synthetic resin tab for opening the can-shaped container lid. The tab is connected to an upper surface of a tab seat constituted by that portion of the thermoplastic resin layer disposed inwardly of the score portion. The score portion is provided by forming a tunnel-like groove at the outer periphery of the tab seat in such a manner that the tunnel-like groove has a suitable height from the surface of contact between the tab seat and the bottom of the can-shaped container lid base, with the thermoplastic resin layer remaining on its outer side above the tunnel-like groove, so as to expose the upper bottom surface of the base to the base to the interior of the tunnel-like groove.

Lid for can-shaped container

A method for making a lid for a can-like container is disclosed which comprises a gas barrier-type multi-layer base for the lid, a reinforcing thermoplastic resin layer formed on said multi-layer base, and a tab seat of synthetic resin having a tab and formed on that portion of the upper surface of the bottom surrounded by said reinforcing thermoplastic resin layer. The tab seat is disposed in spaced relation to said upper surface of the bottom and disposed in such a manner that a score portion having as small a width as possible is formed between the outer periphery of the tab seat and the inner peripheral edge of said reinforcing thermoplastic resin layer. The upper surface of said bottom is exposed through the score portion.

Lid for can-like container and method for making an easily opened

A lid for a can-like container is disclosed which comprises a gas barrier-type multi-layer base for the lid, a reinforcing thermoplastic resin layer formed on said multi-layer base, and a tab seat of a synthetic resin having a tab and formed on that portion of the upper surface of the bottom surrounded by said reinforcing thermoplastic resin layer. The tab seat is disposed in spaced relation to said upper surface of the bottom and disposed in such a manner that a score portion having as small a width as possible is formed between the outer periphery of the tab seat and the inner peripheral edge of said reinforcing thermoplastic resin layer. The upper surface of said bottom is exposed through the score portion.

Lid for can-like container and method of manufacturing same

A method for manufacturing shaped articles by injection-blow molding. A thermoplastic material is first formed into a bottomed parison by injection-molding said material onto the surface of an injection molding core. The bottomed parison formed on the surface of the core is cooled to a temperature at which it is easily removed from the core, and is removed therefrom. The parison is heated again to a predetermined temperature and the reheated parison is transferred to a blow molding mold, wherein the parison is blow-molded.

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Tokyo, Japan

Wasuke Sato