Ricoh C211 Service Manual page 470

4. Separation Mechanism
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The separation plate [A] is in contact with the upper separation roller [C] due to the
spring [B]. This is to prevent multiple paper feed.
As the lower separation roller [D] does not turn clockwise due to the one way clutch
bearings [G] provided on both right and left separation levers [E], the sheets are
separated and a sheet of paper is fed to the second feed rollers. When 2 sheets of paper
are fed, brake force is applied to the lower sheet of paper.
The pressure between upper and lower separation rollers can be adjusted in two steps
by changing the right and left separation pressure adjusting levers [F].
Up (Weak position)
+ Spring tension and separation pressure decrease.
Down (Standard position) + Spring tension and separation pressure increase.
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