Fig. 458 Pickup Roller Rotation Drive - Canon NP-70 Service Manual

4-54
NP-70
4.10
PAPER PICKUP ROLLER ASSEMBLY (W/ CONTROLLER ASSEMBLY)
4.10-1 OUTLINE OF ASSEMBLY OPERATION
This assembly functions to pick up a sheet of copy paper from the Cassette Assembly and
feed it into the copier in proper synchronization with drum and copyboard movement.
The synchronization is unsured by the operation of the Paper Feed Controller Assembly;
thus, this assembly is included for explanation purposes. The operation occurs as follows:
a) The paper pickup roller is driven to rotate by the main motor through the drive mecha-
nism shown in Fig. 4-58. The roller rotates continuously while the main motor is in
operation.
Roller Drive Sprocket (A)
Paper Pickup Roller
Idler
Sprocket
Ladder Chain _
Gear Driving
Roller Drive \ ( Sprocket
Sprocket (B)
Pickup Roller
Drive Shaft
Fig. 458 Pickup Roller Rotation Drive
rive Chain
b) Though the pickup roller rotates, it does not pick up any sheet of paper unless the
roller is lowered on the paper in the cassette by the up-down drive of the components
shown in Fig. 4-59.
Second Printing-June, 1974
© CANON INC.