Wear Prevention - Ricoh FT4430 Service Manual

16 April '88

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
As the feed roller drive gear rotates, the high point of the cam pushes back
the wear prevention lever in the
point, a spring returns the wear prevention lever to its original position (black
arrow B). 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 is rotated
a few degrees. This prevents the friction roller [D] from wearing unevenly or
too quickly.
A.
A
direction. As the cam rotates to the low
7-8