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:
Sep. 22, 2015
Filed:
Mar. 12, 2014
Tsukasa Satoh, Kanagawa, JP;
Hironori Yamaoka, Kanagawa, JP;
Shinichi Namekata, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A fixing device, corresponding to a plurality of sheet passing widths, includes a rotating member configured to convey a recording medium, rise in temperature, and fix toner; temperature sensors configured to detect the surface temperature of the rotating member; heating members including at least one heat generating unit, provided inside the rotating member; and a control unit configured to control a heating state obtained by the heating members. The heat generating units are provided not to overlap each other in the direction of the sheet passing width orthogonal to the recording medium conveying direction. The temperature sensors are only placed at positions corresponding to the heat generating units used when printing on the recording medium having a minimum width. The control unit controls the heating state in accordance with the surface temperature, a sheet passing width, and an operational state of the rotating member that changes with time.