13-6.Paper Take Up Mechanism; Paper Separating Mechanism - Minolta Di450 Service Manual

13-6. Paper Take Up Mechanism
Drive for the paper take-up sequence comes from a motor.
Paper Take-Up Roll
Separator Roll
Front
(1)

Paper Separating Mechanism

The difference in friction coefficient between the Feed Roll and Separator Roll is used to
stop the rotation of the Separator Roll for the prevention of double feed.
Normal feeding: When only one sheet of paper is taken up, the friction coefficient on the
top side of the paper is equal to that on the underside. The Separator Roll
is driven by the Feed Roll, which results in the paper being fed on.
Double feeding: Since the friction coefficient between the second sheet of paper and the
Separator Roll is greater than that between the first and second sheets of
paper, the Separator Roll remains stationary, allowing the Feed Roll to
feed only the first sheet of paper.
Normal Feeding
Feed Roll
Paper
Separator Roll
Driven or stationary
1st Drawer Paper Take-Up Motor
Feed Roll M4
2nd Drawer Paper Take-Up Motor
M5
Torque Limiter
Double Feeding
Feed Roll
1st sheet of paper
2nd sheet of paper
Separator Roll
4425M012AA
M-53
Rear
4640M003AA
4425M013AA
Stopped