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. 05, 2005
Filed:
Sep. 17, 2002
Shinji Yamaguchi, Ama-gun, JP;
Yoshinobu Goto, Nagoya, JP;
Hisakazu Okajima, Nishikasugai-gun, JP;
Yutaka Unno, Handa, JP;
Shinji Yamaguchi, Ama-gun, JP;
Yoshinobu Goto, Nagoya, JP;
Hisakazu Okajima, Nishikasugai-gun, JP;
Yutaka Unno, Handa, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A heating systemhas a main electric heat-generating elementand a heating surfacefor heating an object, auxiliary electric heat-generating elementsA toD, and a main power sourcefor supplying power to the main heating element. The systemfurther has an auxiliary power sourcefor supplying power to the auxiliary heating elements, and a power source controller for controlling the power supplied to the main heating element and to the auxiliary heating elements respectively and independently. Power supplied to the main heating elementis controlled by the controller within a first power range and power supplied to the auxiliary heating elements is controlled by the controller within a second power range. The second power range has a width smaller than that of the first power range so as to control temperature distribution on the heating surface