Electrophotography – Control of electrophotography process – Control of fixing
Patent
1998-06-01
2000-04-25
Lee, Susan S. Y.
Electrophotography
Control of electrophotography process
Control of fixing
219216, 399329, G03G 1520
Patent
active
060553901
ABSTRACT:
A belt fixing device including a fixing roller, a heating roller, an endless fixing belt spanned around the fixing roller and the heating roller and a pressing roller disposed opposing the fixing roller via the fixing belt, a heater disposed at least in the inside of the heating roller for heating the fixing belt, a heating area where the fixing belt is heated by the heating roller, a fixing area including a first fixing part where the pressing roller contacts the fixing belt without pressing the fixing roller and a second fixing part where the pressing roller presses the fixing roller via the fixing belt, a temperature detect device which detects a surface temperature of the fixing belt in the heating area, and a temperature control device which controls the surface temperature of the fixing belt in the heating area to a prescribed temperature according to a detect result of the temperature detect device. The prescribed temperature includes at least a first prescribed temperature and a second prescribed temperature, the first prescribed temperature being higher than the second prescribed temperature, and the temperature control device changes the first prescribed temperature to the second prescribed temperature when fixing is started after the fixing belt starts rotating upon receiving a start signal to start an image forming operation.
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Hirai Kazumasa
Kurotaka Shigeo
Lee Susan S. Y.
Ricoh & Company, Ltd.
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