Electrophotography – Control of electrophotography process – Control of fixing
Patent
1997-08-29
1999-05-04
Grimley, Arthur T.
Electrophotography
Control of electrophotography process
Control of fixing
399 70, 430124, G03G 1520
Patent
active
058995994
ABSTRACT:
A fixing device capable of producing fixed images of excellent quality by using a thin-layer rotating heating member and a heating element capable of rapidly and directly heating a rotating heating member to shorten the warm-up time of the rotating heating member, and capable of suppressing fluctuation of the rotating heating member temperature when a recording member is inserted between the rotating heating member and a rotating pressure member after the rotating heating member has been warmed up. The fixing device has a heating roller heated by a resistance heating element, a pressure roller opposite the heating roller, a temperature detector to detect the heating roller temperature, and a control unit to control the power supplied to the resistance heating element based on the temperature detected by the temperature detector. The heating roller and the pressure roller start rotating before the warm-up period ends, and power is supplied to the resistance heating element at a power level required to maintain the temperature of the heating roller at a predetermined fixing temperature directly after insertion of a recording member, bearing an unfixed image, between the heating roller and the pressure roller in accordance with the rate of temperature rise of the heating roller, during rotation of the heating roller, from the start of rotation or after the start of rotation of the hearing roller, but before the warm-up period ends.
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Chen Sophia S.
Grimley Arthur T.
Minolta Co. , Ltd.
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