Duplex Paper Feed - Ricoh FT5540 Service Manual

31 August 1989

14.5 DUPLEX PAPER FEED

Basic Operation
Duplex paper feed uses an FRR (Feed + Reverse Roller) paper feed system. This is similar to
the cassette feed system, except that the duplex pick-up roller [A] remains on the paper stack
after feeding a sheet to the duplex feed roller [B]. (The cassette pick-up roller lifts after paper
feed starts.) This mechanism prevents the sheet below the top sheet from being pushed
backwards by the duplex separation roller [C]. The pick-up roller slows down the next sheet
rejected by the duplex separation roller so that it remains in position for feeding at the next
copy cycle.
During duplex feed, the duplex stopper [D] is moved under the duplex paper feed guide plate
[E] and the duplex positioning roller [F] is lifted out of the way.
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