Oki MC561 Maintenance Manual page 42

Oki Data CONFIDENTIAL
(6) Duplex printing system (paper flipping and returning to the paper feed route)
1. In a cer tain period of time af ter the fuser motor star ts running
counterclockwise and the rear end of paper being fed passes the eject
sensor, the fuser motor starts running clockwise. (It changes from the state
shown in Figure 2-7 to the state shown in Figure 2-8.)
2. As a result of that, the eject rollers start rotating in the reverse direction, and
the paper is flipped and carried to the duplex unit.
3. When the duplex unit clutch becomes on, the paper is transferred by the
duplex unit transport rollers.
4. In a certain period of time after the rear end of the paper passes the eject
rollers, the fuser motor starts running counterclockwise, and as a result of
this, the eject rollers can carry the next paper to the exit. (It changes from
the state shown in Figure 2-8 to the state shown in Figure 2-7.) (The duplex
unit transport rollers rotate in the same direction regardless of the running
direction of the motor.)
5. The paper that is carried by the duplex unit transport rollers comes back to
the route for paper feeding from a tray. After that, the paper is handled in
the same way as paper fed from a tray for simplex printing.
44473001TH Rev.1
Eject roller (drive)
Fuser unit
Heat roller (drive)
Fuser motor (counterclockwise)
Eject sensor
Duplex unit clutch
Figure 2-7
Eject roller (drive)
Fuser unit
Heat roller (drive)
Eject sensor
Fuser motor (clockwise)
Duplex unit clutch
Duplex unit transport roller
Figure 2-8
2. DESCRIPTION OF OPERATION
Duplex unit transport roller
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