Fixing device

Details Fixing device Fixing device

2007-07-24

2007-07-24

Ngo, Hoang (Department: 2852)

Electrophotography

Diagnostics

Fixing

C399S069000, C399S070000

Reexamination Certificate

active

11063989

ABSTRACT:
A fixing device includes a heater; a fixing rotary body having a circumferential surface which paper carrying an unfixed image makes contacts with and passes on, and heated to a predetermined temperature by a heating operation of the heater; a temperature detecting unit which detects the temperature of a portion of the circumferential surface inside a widest paper passage region in an axial direction of the fixing rotary body; a control unit which stops the heating operation of the heater when a temperature detected by the temperature detecting unit exceeds a predetermined overheat temperature; and a measuring unit which measures a continuous heating time from a point of time when the heating operation of the heater starts. The control unit stops the heating operation of the heater when the continuous heating time measured by the measuring unit exceeds a predetermined scheduled heating time.

REFERENCES:
patent: 5987275 (1999-11-01), Toyohara et al.
patent: 11-242405 (1999-09-01), None

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