The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 17, 1996
Filed:
Aug. 03, 1995
Michio Ishida, Nara, JP;
Tsutomu Kuwahara, Nara-ken, JP;
Hideo Sato, Toyonaka, JP;
Yoshitoshi Sekiguchi, Maizuru, JP;
Kunio Sasaki, Maizuru, JP;
Shiro Sakata, Maizuru, JP;
Hiroshi Kosaka, Yao, JP;
Toshio Hirai, Yamatokouriyama, JP;
Hitachi Zosen Corporation, , JP;
Abstract
A plasma melting furnace has a melting chamber having an anode torch and a cathode torch made of graphite and having a electric conductor disposed on the bottom thereof. When the furnace is operated, the anode torch, having an inflow of electrons, which forms an unstable plasma arc is contacted with the electric conductor and is not used, while the cathode torch, having an outflow of electrons, which forms a stable plasma arc, is utilized for heating, whereby the furnace can be stably and continuously operated. Thus, since the cathode torch which is used is not heated so much and the anode torch, which is liable to be heated to a great degree, is not used, the electrode consumption rate can be greatly reduced.