Temperature control for a fixing device

Details Temperature control for a fixing device Temperature control for a fixing device

1997-04-09

1998-10-06

Grimley, Arthur T.

Electrophotography

Control of electrophotography process

Control of fixing

399 92, G03G 1520

Patent

active

058191364

ABSTRACT:
A control operation for a fixing device which may find application in an image forming apparatus such as a printer, facsimile, or copier machine, etc. The fixing device controls a temperature of a fixing element therein, for example a fixing roller, based on a calculated compensated temperature T' of the fixing roller, which is calculated based on detected temperature of the fixing element T0 and a reference environmental temperature T1 within the image forming apparatus according to the following equations: ##EQU1## in which each of A1-A4, a1-a4, b1-b4 and c1-c4 are constants. Experimental results have indicated that such a compensation temperature value T' closely approximates an actual temperature of the fixing element. Thus, with such an operation, a temperature of a fixing element can be controlled to an appropriate value.

REFERENCES:
patent: 4248520 (1981-02-01), Kurita et al.
patent: 4556779 (1985-12-01), Hashimoto et al.
patent: 4821069 (1989-04-01), Kusumoto
patent: 5502546 (1996-03-01), Muto
patent: 5561512 (1996-10-01), Fukano et al.
patent: 5581341 (1996-12-01), Tanaka

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