Antonelli, Terry, Stout & Kraus
Structure of metal container having trunk pipe and branch pipe, and manufacturing method and apparatus therefor
 A method for manufacturing a welded metal container by first arc welding a branch pipe to a trunk pipe. The arc welding of the pipes together causes both of the pipes to be thermally deformed. The end surfaces of the pipes are then cut by a laser cutting or mechanical cutting process so that the ends of the trunk pipe are in parallel and perpendicular to the end of the branch pipe. Subsequently flanges are laser welded to the ends of the pipes without further thermally deforming the pipes. The metal container made by this process can be used as a sheath for a gas insulated switch gear. 
Hitachi, Ltd.
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inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional additional inventional inventional inventional
Katsuro Takashi Hideaki Seizo Osamu Osamu Sadao Takashi Koji Masaki Shinji Yutaka Masayoshi
Ota Sato Kikuchi Nakano Matsushima Isshiki Nakagawa Satoh Goto Murashita Fukuda Kobayashi Hashiura