Daiwa Can Company

Takashi Kawada

Kenji Takagi

Eiji Fujishige

Eiji Araki

Junji Matsumura

Yukikazu Hiraide

Kenji Kawahara

A cap comprising a cap body including a top plate portion which is disk-shaped, and a skirt portion which is cylindrical and provided at a peripheral edge portion of the top plate portion, the top plate portion including a substrate and a resin coating film provided on a cap inner surface side of the substrate, the resin coating film including a polyester-based resin and a lubricant, and a sealing member provided in the cap body separately from the cap body so as to face the top plate portion, and having an outer diameter smaller than an inner diameter of the skirt portion.

A cap comprises a cap body including a top plate portion and a skirt portion integrally provided with the top plate portion through a corner portion and screwed to a mouth portion of a can container, and a disk-shaped sealing member including a sliding layer which is provided separately from the cap body to face the top plate portion, includes a protrusion portion formed on an outer peripheral side of a portion opposed to the mouth portion when the cap body is screwed with the can container and gradually decreasing in thickness toward an outer peripheral edge, and slides on the top plate portion and a sealing layer which is integrally provided with the sliding layer and seals the mouth portion.

Cap, mold and manufacturing method of cap

A cap includes a cap body including a top plate portion and a skirt portion; a sealing member that is a separate member from the cap body and is provided in the cap body, the sealing member having an outer diameter smaller than an inner diameter of the skirt portion; a plurality of locking portions provided in a circumferential direction of the skirt portion, and configured to regulate a movement of the sealing member in a direction away from the top plate portion and support the sealing member; and a plurality of regulating portions provided in the circumferential direction of the skirt portion, protruding inward in a radial direction than an inner peripheral surface of the skirt portion, and configured to regulate a radial movement of the sealing member.

Cap configured to retain sealing member in cap body

A manufacturing method of a cap () includes: supplying a first resin material to a molded product (A) having a top plate portion () and a skirt portion () integrally formed on the top plate portion () through a corner portion (); molding the first resin material of the molded product (A) disposed in a first lower mold () into a sliding layer () with a first upper mold (); supplying a second resin material to the sliding layer (); molding the second resin material of the molded product (A) disposed in a second lower mold () into a sealing layer () with a second upper mold (); taking out a sealing member () in the molded product (A); and inserting the sealing member () into another molded product (A).

Growing community of inventors

Sagamihara, Japan

Takashi Kawada