Method and apparatus for controlling a temperature of a fixing r

Details Method and apparatus for controlling a temperature of a fixing r Method and apparatus for controlling a temperature of a fixing r

1997-04-30

1998-11-03

Grimley, Arthur T.

Electrophotography

Diagnostics

Fixing

399 43, 399 45, 399 69, G03G 1520

Patent

active

058323309

ABSTRACT:
In a fixing system used to an electrophotographic recording apparatus, when a fixing roller is heated to a temperature above a preset fixing temperature by a heater and then a thermistor senses that the surface temperature of the fixing roller falls below the fixing temperature, a heater controller energizes the heater for a predetermined driving time and then deenergizes of the heater for a predetermined heater interrupting time to thereby control the surface temperature of the fixing roller. The heater driving time and the heater interrupting time may be stored in a memory region in accordance with respective sizes of recording papers. The duty ratio of the heater may be changed when a predetermined number of images have been recorded or when the fixing system is continuously operated for longer than a predetermined time.

REFERENCES:
patent: 5249062 (1993-09-01), Ejiri et al.
patent: 5365314 (1994-11-01), Okuda et al.
patent: 5465141 (1995-11-01), Asano et al.
patent: 5682577 (1997-10-01), Kiyoi

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