Image heating apparatus

Details Image heating apparatus Image heating apparatus

2008-05-27

2008-05-27

Gleitz, Ryan (Department: 2852)

Electrophotography

Control of electrophotography process

Control of fixing

Reexamination Certificate

active

07379685

ABSTRACT:
An image heating apparatus that enables a temperature of an image heating element to be stably maintained at a target temperature as a fixing speed varies. A Proportional-Integral-Derivative (PID) controller determines whether a temperature control computation results in a range that allows temperature control with one IGBT, and a linear control is performed if the result is at least equal to a minimum power obtained as IH output. PWM control is performed at minimum power if the power is less than a required minimum power. Thus, a computation method of a supply power computator need not be switched according to the fixing speed, and a calorific value of a fixing belt can be controlled using one computation method.

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English Language Abstract of JP 2002-169410.
English Language Abstract of JP 2002-304083.
English Language Abstract of JP 9-006180.
English Language Abstract of JP 2000-259018.
English Language Abstract of JP 7-175363.
English Language Abstract of JP 61-075409.

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