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. 26, 2017
Filed:
May. 02, 2016
Shohta Kobashigawa, Tokyo, JP;
Kenji Ishii, Kanagawa, JP;
Kazuhito Kishi, Kanagawa, JP;
Takayuki Seki, Kanagawa, JP;
Hiroshi Yoshinaga, Chiba, JP;
Takashi Seto, Kanagawa, JP;
Hiromasa Takagi, Tokyo, JP;
Ippei Fujimoto, Kanagawa, JP;
Hiroshi Seo, Kanagawa, JP;
Takamasa Hase, Tokyo, JP;
Kazunari Sawada, Tokyo, JP;
Yasuhiko Ogino, Kanagawa, JP;
Shohta Kobashigawa, Tokyo, JP;
Kenji Ishii, Kanagawa, JP;
Kazuhito Kishi, Kanagawa, JP;
Takayuki Seki, Kanagawa, JP;
Hiroshi Yoshinaga, Chiba, JP;
Takashi Seto, Kanagawa, JP;
Hiromasa Takagi, Tokyo, JP;
Ippei Fujimoto, Kanagawa, JP;
Hiroshi Seo, Kanagawa, JP;
Takamasa Hase, Tokyo, JP;
Kazunari Sawada, Tokyo, JP;
Yasuhiko Ogino, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A fixing device includes a primary heater disposed opposite a fixing rotator to heat a circumferential span of the fixing rotator other than a fixing nip formed between the fixing rotator and a pressure rotator and a secondary heater disposed outboard from the primary heater in an axial direction of the fixing rotator to heat the fixing rotator at the fixing nip. The primary heater and the secondary heater heat a bi-heating span of the fixing rotator in the axial direction thereof. The secondary heater heats a mono-heating span of the fixing rotator in the axial direction thereof and generates a decreased amount of heat to be conducted to the bi-heating span of the fixing rotator. The decreased amount of heat is smaller than an increased amount of heat to be conducted to the mono-heating span of the fixing rotator that is heated by the secondary heater only.