Image forming device and photographic fixing device

Application Number: 00120148
Application Date: 2000.07.18
Publication Number: 1282006
Publication Date: 2001.01.31
Priority Information: 1999/7/23 JP 208686/99
International: G03G15/20
Applicant(s) Name: Ricoh Co., Ltd.
Inventor(s) Name: Yamada Masamichi
Patent Agency Code: 11105
Patent Agent: yang wu
Abstract The present invention relates to an image forming apparatus and a fixing device such as a printer, a copier, a Fax etc. This image forming device is constituted so that the surface of either a fixing roller 35 on a pressure roller 38 is harder than that of the other. Besides, the image forming device is provided with a 1st gear arranged on the square shaft and a 2nd gear arranged on the identical shaft of the other roller through a unidirectional clutch. Then, the 2nd and the 1st gears are meshed at a pressuring time. Under the condition of small coating weight, the durability is excellent, the linear velocity is stable, on foldings on the transfer printing materials and the rising time can be shortened.