Method of and apparatus for controlling fixing device in electro

Details Method of and apparatus for controlling fixing device in electro Method of and apparatus for controlling fixing device in electro

1991-06-13

1992-08-18

Grimley, A. T.

Electric heating

Heating devices

Combined with diverse-type art device

219490, 219494, 355282, 355285, G03G 1520

Patent

active

051401320

ABSTRACT:
A method and an apparatus for controlling a fixing device in an electrophotographic recording system provides for periodically sampling the temperature of the fixing device, detecting whether the sampled temperature of the fixing device is on an upward trend of a downward trend, and controlling the on/off operation of the fixing device on the basis of the detected trend and on a predetermined changeover temperature range.

REFERENCES:
patent: T100804 (1981-07-01), Ernst
patent: 4113375 (1978-09-01), Murata et al.
patent: 4348102 (1982-09-01), Sessink
patent: 4415800 (1983-11-01), Dodge et al.
patent: 4512649 (1985-04-01), Derimiggio
patent: 4603245 (1986-07-01), Yagasaki
patent: 4868368 (1989-09-01), Araki

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