Bando Chemical Industries, Inc.

Bando Kagaku Kabushiki Kaisha

Hirotaka Hatai

Yoshitaka Tajima

Takamitsu Akashi

Shinichi Kaji

Yoshio Morishita

Akira Mayahara

Sizuaki Tsuruta

Power transmission belt and method of manufacturing the same

Vulcanizing apparatus including a sealable vulcanizing vessel having an access cover on the top thereof, and a mold to be inserted in the vulcanizing vessel. The length of a rubber sleeve provided to cover the unvulcanized rubber belt molding A formed over the external circumference of the mold is sized a little longer than the height of the mold so that both ends of the rubber sleeve when placed in covering position protrude slightly from both the top and bottom ends of the mold. A holding seat is provided in the lower part of the vulcanizing vessel, and a pressing seat corresponding to the holding seat is provided on the access cover via a cylinder unit so that the pressing seat can be extended and retracted as required. The inner structures of both the pressing seat and holding seat include cooling jackets.

Endless rubber belt vulcanizing apparatus

A metallic mold for vulcanizing molding of cogged V-belt with unvulcanized belt material, including a lower mold having a gentle back curve in lengthwise direction thereof and an upper mold having a cogged surface with cog peak parts and cog trough parts arranged alternately. The upper mold is so designed that cog peak parts in the specific range at both end portions thereof are narrower than those at the other part but both are the same in height in lengthwise direction.

Metallic mold for cogged V-belt

Growing community of inventors

Kobe, Japan

Hirotaka Hatai