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PTM 2-73 B070/B071
2.10 FUSING
2.10.1 OVERVIEW
After transferring the image, the copy paper enters the fusing unit. A heat and
pressure process using a hot roller [A] and a pressure roller [B] fuses the image to the
copy paper. There are three fusing lamps of different wattage [C] inside the hot roller.
They are turned on and off to maintain the target fusing temperature.
The CPU monitors the hot roller surface temperature through a thermistor [D], which is
in contact with the hot roller’s surface. A thermostat [E] protects the fusing unit from
overheating.
The fusing exit sensor [F] monitors the progress of the copy paper through the fusing
unit and acts as a mis-feed detector while the exit rollers drive the copy paper to the
inverter section.
The oil supply roller and cleaning web [G] applies a light coat of silicone oil to the hot
roller. It also removes the paper dust on the hot roller.
The hot roller and pressure roller have stripper pawls [H] to prevent wrap-around jams.
The pressure roller is cleaned by a steel cleaning roller [I]. Toner adheres to steel
more readily than to silicone rubber.
B070D501.WMF
[E]
[B]
[G]
[A]
[D]
[I]
[F]
[H]
[C]