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:
Aug. 07, 2012
Filed:
Apr. 06, 2009
Setsuo Takada, Shizuoka, JP;
Setsuo Takada, Shizuoka, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Tec Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus having a fixing devicethat includes a fixing roller, a center coilfor induction heating a substantially central part in the axial direction of the fixing roller, side coilsfor induction-heating end parts in the axial direction of the fixing roller, induction heating power sourceswhich supply a high-frequency pulse voltage to these coils, and a power control circuitwhich variably controls output power of the induction heating power sourcesso that the output power increases or decreases stepwise on a predetermined cycle, and has a function of selectively setting maximum power supply and a function of selectively setting the output power variance cycle.