Ricoh Di-C1 Manual page 260

Duplex Entrance
Sensor
Duplex Exit
Sensor
Slide 260
With interleaving, there can be two sheets of paper in the machine at the
same time.
Duplex Upper
Drive
Motor
Three motors control
the rollers.
Duplex inverter
motor (explained
previously)
Duplex upper
motor
Duplex lower
motor
Two sensors control
the paper feed timing
and detect jams.
Duplex entrance
sensor
Duplex exit sensor
Duplex Lower
Motor
260
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