Toyo Seikan Kaisha, Ltd.

Japan Crown Cork Co Ltd.

Yoshiharu Shibata

Kashiwa Murayama

Masakazu Tatsuta

Hideki Yajima

Hiroshi Sato

Tateo Kubo

Yuji Kano

Kinji Fuchie

A molding system for molding a plastic grip member and, at the same time, linking it to a linking protruding piece of a container closure body. The molding system comprises a rotary container closure body conveyor apparatus and a compression molding apparatus. The container closure body conveyor apparatus is provided with a rotary disc that has a plurality of container closure body-receiving portions formed therein and a rotation preventing mechanism that prevents the rotation of the container closure bodies held in the receiving portions. The compression molding apparatus has a mold constituted by a first mold portion and a second mold portion. The first mold portion includes a moving member that moves between a mold position and a separated position. The moving member has a supporting surface for supporting the skirt wall of the container closure body and a support projection for supporting the linking protruding piece of the container closure body. A moving member-moving mechanism is disposed to selectively move the moving member to the mold position or to the separated position.

Apparatus for forming plastic grip member of container closure

A container closure is disclosed having a metallic body and a plastic grip piece. The body includes a top panel wall, a skirt wall extending down from the perepheral edge of the top panel wall, and a linking protruding piece that protrudes from the lower end of the skirt wall. The grip piece includes a linking base portion that covers at least both surfaces of the end portion of the linking protruding piece of the body, and a grip portion that extends from the linking base portion. The grip piece is formed and is, at the same time, linked to the linking protruding piece of the body by flowing a plastic material from one side of the linking protruding piece that positions in the space of the mold. A plastic material inflow groove that extends from the free end thereof toward the lower end of the skirt wall is formed on the side of the other surface of the linking protruding piece of the body.

Container closure having metallic body and plastic grip piece

Growing community of inventors

Hiratsuka, Japan

Yoshiharu Shibata