Fixing device

Details Fixing device Fixing device

2007-01-19

2009-10-27

Lee, Susan S (Department: 2852)

Electrophotography

Diagnostics

Fixing

C399S069000

Reexamination Certificate

active

07609984

ABSTRACT:
The fixing device includes a pair of rotating bodies which conveys a recording medium between a nip; a heating unit which heats at least one of the rotating bodies; and a temperature detection unit which detects a temperature of at least one of the rotating bodies. The temperature detection unit detects a temperature change until an image forming apparatus is normally operated since the heating unit starts the heating, and the temperature change is stored. It is judged that the image forming apparatus is in an abnormal state when the temperature detection unit detects a temperature change different from the temperature change in the normal operation. A temperature control unit stops passage of current through the heating unit when it is judged that the image forming apparatus is in the abnormal state.

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