Separation Mechanism - Ricoh FT5540 Service Manual

31 August 1989

4. SEPARATION MECHANISM

µ1 - Coefficient of friction between the feed rollers [A] and the original [B].
µ2 - Coefficient of friction between the friction rollers [C] and the original.
µ3 - Coefficient of friction between originals.
This model uses an FFR (Feed and Friction Roller) original feed system with three sets of
rollers (feed, friction and pick-up rollers). The feed and friction rollers have grooves in them
which interlock with one another. The rollers interlock to decrease damage to the originals
(particularly pencil written originals) from direct roller-to-roller pressure.
The pick-up roller sometimes sends more than one original to the feed and friction rollers.
When this happens, the friction rollers strip the extra original from the top original. m1 is
greater than m3 and m2 is greater than m3. Therefore, the top original will slide past the
friction rollers while lower originals stop.