Gestetner B070 Service Manual page 644

FUSING
6.16 FUSING
6.16.1 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.
(!6.16.4)
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.
B070/B071
CÓPIA NÃO CONTROLADA
[F]
[H]
[I]
6-128
CÓPIA NÃO CONTROLADA
[E] [D]
[A]
B070D501.WMF
[G]
[C]
[B]
SM