Invention Grant
- Patent Title: Fixing device and image forming apparatus employing the fixing device
- Patent Title (中): 固定装置和采用定影装置的成像装置
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Application No.: US12461314Application Date: 2009-08-07
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Publication No.: US08417137B2Publication Date: 2013-04-09
- Inventor: Yutaka Naitoh , Toshio Ogiso , Tamotsu Ikeda
- Applicant: Yutaka Naitoh , Toshio Ogiso , Tamotsu Ikeda
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company Limited
- Current Assignee: Ricoh Company Limited
- Current Assignee Address: JP Tokyo
- Agency: Harness, Dickey & Pierce, P.L.C.
- Priority: JP2008-205737 20080808; JP2009-085467 20090331
- Main IPC: G03G15/20
- IPC: G03G15/20

Abstract:
A fixing device includes a rotary fixing member, a counter member to contact the rotary fixing member, a first heater to heat the rotary fixing member, a driving unit to rotate the rotary fixing member, a temperature detector to detect a temperature of the rotary fixing member, and a contact-and-separation unit to switch between contact and separation states of the rotary fixing member relative to the counter member. In a temperature-raising operation, the driving unit causes the rotary fixing member to rotate when the temperature detector detects that the temperature of the rotary fixing member has reached a first setting temperature. The contact-and-separation unit causes the rotary fixing member in rotation and the counter member to contact each other when the temperature detector detects that the temperature of the rotary fixing member has reached a second setting temperature that is higher than the first setting temperature.
Public/Granted literature
- US20100034548A1 Fixing device and image forming apparatus employing the fixing device Public/Granted day:2010-02-11
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