Daiwa Can Company

Kenji Takagi

Eiji Araki

Eiji Fujishige

Takashi Kawada

Junji Matsumura

Yukikazu Hiraide

Kenji Kawahara

Keisuke Hashimoto

A cap includes: a cap body including a top plate portion and a cylindrical skirt portion; a sealing member provided in the cap body separately from the cap body so as to face the top plate portion; a plurality of locking portions arranged in a circumferential direction in the skirt portion, the locking portions protruding inward in a radial direction of the skirt portion and supporting the sealing member; a plurality of small diameter portions arranged between the top plate portion and the locking portions of the skirt portion, the small diameter portions being respectively provided on a top plate portion side of the locking portions in the axial direction; and a plurality of large diameter portions provided adjacent to the small diameter portions in the circumferential direction and having an inscribed circle diameter larger than an inscribed circle diameter of the plurality of small diameter portions.

Cap and method for manufacturing cap

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 disk-shaped top plate portion and a cylindrical skirt portion provided at a peripheral edge portion of the top plate portion; and a disk-shaped sealing member including a sliding layer and a sealing layer, the sliding layer disposed on the top plate portion side and having a thin portion thinner than at least a center side provided on an outer peripheral edge side, and the sealing layer provided on a main surface opposite to the top plate portion side of the sliding layer and sealing a mouth portion of a can container.

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

Kenji Takagi