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:
Nov. 25, 2014
Filed:
Apr. 26, 2012
Atsushi Yamaguchi, Tahara, JP;
Seiichi Kirikubo, Toyohashi, JP;
Yutaka Yamamoto, Shinshiro, JP;
Takahiro Tsujimoto, Toyokawa, JP;
Hiroyuki Watanabe, Toyokawa, JP;
Hidenori Mine, Toyohashi, JP;
Masato Ishii, Toyokawa, JP;
Atsushi Yamaguchi, Tahara, JP;
Seiichi Kirikubo, Toyohashi, JP;
Yutaka Yamamoto, Shinshiro, JP;
Takahiro Tsujimoto, Toyokawa, JP;
Hiroyuki Watanabe, Toyokawa, JP;
Hidenori Mine, Toyohashi, JP;
Masato Ishii, Toyokawa, JP;
Konica Minolta, Inc., Chiyoda-Ku, Tokyo, JP;
Abstract
An induction heating device including a coil which inductively heats a workpiece of a fuser with an input voltage obtained from an alternating current voltage by rectification; a switching element coupled in series with the coil; a peak voltage detector which detects a peak value of the input voltage; an effective voltage detector which detects an effective value of the input voltage; a crest factor calculator which calculates an actual crest factor of the input voltage based on the peak value of the input voltage and the effective value of the input voltage; and a power controller which achieves control of power to the fuser by controlling the duty ratio of ON and OFF periods of the switching element.