Wear Prevention - Ricoh FT5540 Service Manual

31 August 1989

6. WEAR PREVENTION

The rear side of the feed roller shaft drive gear has an eccentric cam [A]. This cam contacts
the wear prevention lever [B] which is attached via a one-way clutch to the friction roller shaft
[C]. This lever is free to rotate in the direction of the white arrow [D].
As the feed roller drive gear rotates, the high point of the cam pushes back the wear
prevention lever in the direction of arrow [D]. As the cam rotates to the low point, a spring
returns the wear prevention lever to its original position (black arrow [E]). When the wear
prevention lever returns, it rotates the friction roller shaft through the one-way clutch.
Every time the feed roller shaft rotates once, the friction roller shaft rotates a few degrees. This
prevents the friction roller from wearing unevenly or too quickly.
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