45530603TH Rev.2
2-4
Oki Data CONFIDENTIAL
2. DESCRIPTION OF OPERATION
(6) Fusing
The toner image transferred on the paper is fused to the paper by heat and
pressure when the paper passes through between the portion of the fuser belt
(mainly comprised with the fuser roller, the pat and the fuser belt) and the pressure
roller in the fuser unit.
The fuser belt unit is heated by internal heater Assy. with specified wattage (e.g.
1200W in 230V environment). The fusing temperature is determined by the value
of the temperature that is the measurement of the thermistor. The thermistor is
arranged as it is contacted with the inside of the fuser belt.
There is also a thermostat for safety purposes. When the heater temperature rises
above a specific temperature, the thermostat opens and shuts down the power
supplied to the heater. The pressure roller is pressed against the fuser belt by press
springs those arranged both sides of the pressure roller.
Heater Assy
Pad
Fuser belt
(7) Drum cleaning
Unfixed toner remaining on the OPC drum is removed by the drum cleaning blade
and collected into the waste toner area of the toner cartridge.
(8) Belt cleaning
To ne r r em ai ni ng on th e i nt er m ed ia te tr an sfe r be lt is sc ra pe d o ff by th e b el t cl ea nin g
blade and collected into the waste toner box of the transfer belt unit.
Drum
Belt cleaning blade
(9) Intermediate transfer roller cleaning
Toner remaining on the intermediate transfer roller is return to transfer belt by
electric field cleaning, and clean by belt cleaning structure.
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