Ricoh FT6645 Manual page 52

23 April 1993 DRUM UNIT
2.5.3 Cleaning Blade Pressure Mechanism and Side-to-Side Movement
[C]
[A]
[D]
[B]
The spring [A] always pushes the cleaning blade against the OPC drum. The
cleaning blade pressure can be manually released by pushing up the release
lever [B]. To prevent cleaning blade deformation during the transportation,
the release lever is locked in the pressure release (upper) position.
The pin [C] at the rear end of the cleaning blade holder touches the cam gear
[D] which gives a side-to-side movement to the blade. This movement helps
to disperse accumulated toner to prevent early blade edge deterioration.
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