Zojirushi Corporation

Hiroshi Haita

Mamoru Fujiyama

Toyohiko Takatsuki

Shinya Yasuda

The present invention is a method of sealing a metal vacuum structure (vacuum bottle) for evacuating a space S closed by component members (an inner shell,and an outer shell,) through an evacuation port and then sealing the evacuation port. Forming a brazing-material placing recess,in one of the component members, the brazing-material placing recess opening downward when the structure is set for evacuation; forming an aperture,in the brazing-material placing recess; placing brazing material, in molten state, in the brazing-material placing recess in such a way as to block the aperture and fixing the brazing material; forming an evacuation port,in the brazing material; fixing a drop preventing member,having a through hole,on the component member in opposed relation to the brazing material; evacuating the space closed by the component members through the evacuation port of the brazing material; melting the brazing material; and making the evacuation port disappear to seal it by melting the brazing material as the drop preventing member prevents the brazing material from dropping.

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Osaka, Japan

Hiroshi Haita