Nippon Sanso Corporation

Jun Yamaki

Takashi Kato

Seiichi Itoh

Yasuhiko Satomi

Eiji Otsuka

A metallic vacuum double-walled container and manufacturing method therein is provided in which an inner container and outer container are both formed from a metal. From among the aforementioned, at least the outer container possesses a body which is formed by rolling a steel plate with a Vickers hardness of 250.about.600. The outer container is then shaped into a cylindrical body, and joined to a processed inner container at their mouth portions to form a metallic double-walled container. This metallic double-walled container is then heat treated at a temperature of 200.degree..about.600.degree. C. under a vacuum, and the space between the two walls of the metallic double-walled container is vacuum sealed to form the final product.

Method of manufacturing metallic vacuum double-walled container

A metallic vacuum double-walled container is provided in which an inner container and outer container are both formed from a metal. From among the aforementioned, at least the outer container possesses a body which is formed by rolling a steel plate with a Vickers hardness of 250.about.600.

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Tokyo, Japan

Jun Yamaki