19
SYNCHRONIZING ROLLERS
The Synchronizing Rollers, operating in phase with the Scanners’ scan
motion and paper feeding, synchronize the leading edge of the copy paper
accurately with the leading edge of the toner image on the PC Drum.
The Upper Synchronizing Roller is a metal roller covered with a polyvinyl
chloride tubing, while the Lower one is a rubber roller.
Paper Leading Edge Detecting
Sensor PC54
Lower Synchronizing Roller
Synchronizing
Roller Clutch CL1
Upper Synchronizing Roller
To facilitate clearing of misfeeds, the Upper Synchronizing Roller is installed
in the Imaging Unit. It is fitted to the Guide Frame of the Imaging Unit and
the Compression Coil Springs at the front and rear ends press the Roller
downward so that it makes contact with the Lower Synchronizing Roller. The
Lower Roller is driven by the drive source, while the Upper Roller follows the
turning of the Lower Roller.
To ensure good image transfer during conditions of high humidity, an
82-megohm resistor is connected to the Pre-Synch Guide Plate and the
Guide Plate is electrically insulated by a plastic spacer installed between the
frame and Guide Plate.
Upper Synchronizing Roller
Compression Coil Spring
Pre-Image Transfer
Guide Plate
Lower Synchronizing Roller
Actuator
Paper Leading Edge
Detecting Sensor PC54
Pre-Synch Guide Plate
Guide Frame
M-67
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