| 摘要 |
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: T' = C(T1) + f(T1)xT0 = g(T1) x (T0)2 + h(T1) x (T0)3 + . . . (equation A) C(T1) = A1 = a1xT1 + b1x (T1)2 + c1x (T1)3 + . . . g(T1) = A2 + a2xT1 + b2x (T1)2 + c2x (T1)3 . . . (equations B) h(T1) = A3 + a3xT1 + b3x (T1)2 + c3x (T1)3 . . . , 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.
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