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. 24, 2013
Filed:
Feb. 02, 2010
Atsushi Yamaguchi, Tahara, JP;
Seiichi Kirikubo, Toyokawa, JP;
Akihiro Hayashi, Okazaki, JP;
Yutaka Yamamoto, Shinshiro, JP;
Naoto Sugaya, Toyokawa, JP;
Atsushi Yamaguchi, Tahara, JP;
Seiichi Kirikubo, Toyokawa, JP;
Akihiro Hayashi, Okazaki, JP;
Yutaka Yamamoto, Shinshiro, JP;
Naoto Sugaya, Toyokawa, JP;
Konica Minolta Business Technologies, Inc., Chiyoda-Ku, Tokyo, JP;
Abstract
While a recording sheet is passing through a fixing nip formed between a heating rollerhaving a heating layer and a pressing rollerpressed against the roller, a coilis exited by high-frequency power from a power source and causes the layer to generate heat. An unfixed image on the recording sheet is fixed by the heat. The power source detects a zero cross timing of a rectified alternating current, detects an instantaneous value at a point a predetermined period after the zero cross timing, calculates an effective power of the alternating current based on the instantaneous value, and controls the output power to be a desired value determined based on the effective power and the surface temperature of the roller. Thus power input to the power source can be quickly detected and power output to the coil can be quickly and stably controlled.