The fixing unit employing the on-demand fixing method consists of a fixing film unit (incorporating a fixing heater, thermistor, and temperature huse), a pressure

roller, and a delivery roller.

The fixing pressure roller and the delivery roller are driven by the main motor (M1). The paper separated from the photosensitive drum is moved to the inside of

the fixing assembly; the paper is then moved outside it after the toner is fused to the paper by the work

of the fixing film and the fixing pressure roller.

The delivery sensor (SR5) is used to detect paper coming out of the fixing assembly.

Function/Method

by fixing film + pressure roller

Unitary flat heater incorporating both main heater and sub heater

[1] Main thermistor (TH1): Temperature control and fault detection

[2] Sub thermistor (TH2): Fault detection

[3] Temperature-switch (TP): Fault detection

[1] Warm-up temperature control

[2] Normal temperature control

[3] Sheet-to-sheet temperature control