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:
Jun. 13, 2017
Filed:
Mar. 08, 2016
Takamasa Hase, Tokyo, JP;
Susumu Matsusaka, Kanagawa, JP;
Yasuhiko Ogino, Kanagawa, JP;
Shohta Kobashigawa, Tokyo, JP;
Kenji Ishii, Kanagawa, JP;
Kazuhito Kishi, Kanagawa, JP;
Takashi Seto, Kanagawa, JP;
Hiroshi Seo, Kanagawa, JP;
Ippei Fujimoto, Kanagawa, JP;
Hiroshi Yoshinaga, Chiba, JP;
Hiromasa Takagi, Tokyo, JP;
Kazunari Sawada, Tokyo, JP;
Takamasa Hase, Tokyo, JP;
Susumu Matsusaka, Kanagawa, JP;
Yasuhiko Ogino, Kanagawa, JP;
Shohta Kobashigawa, Tokyo, JP;
Kenji Ishii, Kanagawa, JP;
Kazuhito Kishi, Kanagawa, JP;
Takashi Seto, Kanagawa, JP;
Hiroshi Seo, Kanagawa, JP;
Ippei Fujimoto, Kanagawa, JP;
Hiroshi Yoshinaga, Chiba, JP;
Hiromasa Takagi, Tokyo, JP;
Kazunari Sawada, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A fixing device includes a primary heater, a secondary heater, and a tertiary heater to heat a primary heating span, a secondary heating span, and a tertiary heating span of a fixing rotator, respectively. A primary temperature detector and a secondary temperature detector detect a temperature of the fixing rotator. A tertiary temperature detector detects a temperature of a pressure rotator. A controller selectively performs a primary control mode to de-energize the tertiary heater and a secondary control mode to connect the secondary heater and the tertiary heater in series to energize the primary heater, the secondary heater, and the tertiary heater. The controller energizes the secondary heater and the tertiary heater in the secondary control mode based on the temperature of the fixing rotator and the pressure rotator detected by the secondary temperature detector and the tertiary temperature detector, respectively.