Image forming apparatus with temperature control

Details Image forming apparatus with temperature control Image forming apparatus with temperature control

2007-02-13

2007-02-13

Beatty, Robert (Department: 2852)

Electrophotography

Control of electrophotography process

Having temperature or humidity detection

C399S094000

Reexamination Certificate

active

10827372

ABSTRACT:
An image forming section forms a visible image on a charged surface of an image bearing body. A transfer section transfers the visible image onto a recording medium. A fixing unit fixes the visible image on the recording medium. A temperature detecting section outputs a signal indicative of a temperature of the image bearing body. A controller performs a cooling operation in which the temperature of the image bearing body is lowered when the signal is higher than a first predetermined value. When the controller performs the cooling operation, the controller turns on and off the heater of the fixing unit with a first duty cycle. When the controller does not perform the cooling operation, the controller turns on and off the heater of the fixing unit with a second duty cycle higher than the first duty cycle. During the cooling operation, the controller may drive the medium-transporting mechanism to rotate in an idling mode in which no printing is performed.

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