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:
Feb. 21, 2017
Filed:
Mar. 11, 2014
Takuya Seshita, Kanagawa, JP;
Hajime Gotoh, Kanagawa, JP;
Takahiro Imada, Kanagawa, JP;
Kensuke Yamaji, Kanagawa, JP;
Akira Suzuki, Tokyo, JP;
Takuya Seshita, Kanagawa, JP;
Hajime Gotoh, Kanagawa, JP;
Takahiro Imada, Kanagawa, JP;
Kensuke Yamaji, Kanagawa, JP;
Akira Suzuki, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A fixing device in an image forming apparatus includes a rotatable fixing member; a plurality of heat sources to heat each area of the fixing member in a longitudinal direction thereof; a pressure member configured to contact the fixing member and forming a nip in association with the fixing member; a nip forming member disposed inside the fixing member and opposite the pressure member to form a fixing nip; a temperature controller to detect temperature at each area of the fixing member and control the temperature via lighting control performed by the heat sources; and a plurality of temperature sensors to detect temperature of the fixing member or the pressure member in each heating area heated by the plurality of heat sources. When a sheet size set by the image forming apparatus and an actually conveyed sheet size are different, operating speed of the device is adjusted.