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. 19, 2016
Filed:
Dec. 26, 2013
Kazuya Saito, Kanagawa, JP;
Takayuki Seki, Kanagawa, JP;
Hiroshi Yoshinaga, Chiba, JP;
Yuji Arai, Kanagawa, JP;
Ryuuichi Mimbu, Kanagawa, JP;
Yutaka Ikebuchi, Kanagawa, JP;
Yoshiki Yamaguchi, Kanagawa, JP;
Shuntaroh Tamaki, Kanagawa, JP;
Toshihiko Shimokawa, Kanagawa, JP;
Shuutaroh Yuasa, Kanagawa, JP;
Kazuya Saito, Kanagawa, JP;
Takayuki Seki, Kanagawa, JP;
Hiroshi Yoshinaga, Chiba, JP;
Yuji Arai, Kanagawa, JP;
Ryuuichi Mimbu, Kanagawa, JP;
Yutaka Ikebuchi, Kanagawa, JP;
Yoshiki Yamaguchi, Kanagawa, JP;
Shuntaroh Tamaki, Kanagawa, JP;
Toshihiko Shimokawa, Kanagawa, JP;
Shuutaroh Yuasa, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A fixing device includes a fixing rotary body rotatable in a predetermined direction of rotation and a heater disposed opposite and heating the fixing rotary body. A heat shield is movable in a circumferential direction of the fixing rotary body and interposed between the heater and the fixing rotary body to shield the fixing rotary body from the heater. A driver is connected to the heat shield to drive and move the heat shield within a circumferential moving span in the circumferential direction of the fixing rotary body. An abnormal temperature detector detects an abnormal temperature of the fixing rotary body that is not lower than a predetermined temperature. The abnormal temperature detector is disposed opposite a circumferential outboard span outboard from the circumferential moving span of the heat shield in the circumferential direction of the fixing rotary body.