Ricoh FT8680 Service Manual page 119

31 July 1995 FUSING
13.5 DE-CURLING AND COOLING MECHANISM
[C]
[A]
[B]
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[C]
[E]
[G]
[F]
[B]
[A] [D]
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The de-curling roller [A] cools the copy paper exiting through the fusing unit.
This prevents sheets in the duplex tray from sticking together because the
toner is too hot.
The copy paper may be back-curled after it passes the fusing unit. The
de-curling roller and the de-curling belt [B] make the copy paper face curl to
improve paper stacking in the sort mode. It is better for copy paper to be
face-curled than to be back-curled in this copier because the copy paper is
stacked facing down in sort mode.
The de-curling roller has, inside it, a heat pipe similar to the hot roller heat
pipe. It releases the heat from the paper to the fins [C]. The fusing cooling fan
[D] in the duct [E] at the machine rear side cools the fins. There is a duct [F],
above the de-curling roller, and a fusing exhaust fan [G] that discharge the
heat in the de-curling unit through the inverter unit, out of the machine.
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