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:
Apr. 24, 2001
Filed:
Dec. 04, 1998
Kozo Wada, Hiroshima, JP;
Etsurou Hirai, Hiroshima, JP;
Kazuya Tsurusaki, Hiroshima, JP;
Yuuji Asahara, Hiroshima, JP;
Kwang-Hee Han, Tokyo, JP;
Jae-Young Lee, Tokyo, JP;
Kyung-Zoon Min, Tokyo, JP;
Kwang-Hum Han, Kwangyang-shi, KR;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
An alloying system for a galvanized steel sheet, the alloying system using an induction heating coil, wherein an impedance matching apparatus is provided between the induction heating coil and a high frequency power source. The impedance matching apparatus comprises a matching transformer having a plurality of intermediate contact points for arbitrarily selecting a turn ratio, and a switching device for alternative changeover of the intermediate contact point, whereby even when the load impedance of the steel sheet varies, maximum power source output is obtained, such that an appropriate heating temperature necessary for forming an alloy layer of the steel sheet can be supplied.