Image Fusing - Ricoh FT6645 Manual

IMAGE FUSING

23 April 1993
7. IMAGE FUSING
7.1 OVERVIEW
[D]
[E]
[F]
[A]
[G]
[C]
[H]
[I]
[B]
[J]
After the image is transferred, the copy paper enters the fusing unit. Then the
image is fused to the copy paper by a heat and pressure process through the
use of a hot roller [A] and pressure roller [B].
The fusing lamp [C] located inside the hot roller is turned on and off to
maintain the operating temperature of 185°C. The CPU monitors the hot
roller surface temperature through a thermistor [D] which is in contact with
the hot roller's surface. A thermofuse [E] protects the fusing unit form
overheating.
This model uses an oilless hot roller system and does not have a hot roller
cleaning mechanism.
The hot roller strippers [F] separate the copy paper from the hot roller and
direct it to the fusing exit rollers [G]. The exit sensor [H] monitors the progress
of the copy paper through the fusing unit and acts as a misfeed detector
while the exit rollers drive the copy paper to the inverter section.
The hook positions of the tension springs [I] on the pressure lever [J] adjusts
the roller pressure.
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