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5.3 Paper Feed System
5.3.1 Outline
The paper feed system feeds a stack of sheets (coming from the finisher) to the position
where the center of the paper stack (stitching position) is aligned to the stapler's staple, al-
lowing the next step (stitching and folding) to be performed.
When sheets of paper have been stacked and aligned on the processing tray, the paddle
motor (M2) rotates in the reverse direction, causing the swing guide to descend. As the
swing guide descends, the paper stack is sandwiched between the upper and lower stack de-
livery rollers. The delivery motor (M3) rotates in the reverse direction, feeding the paper
stack toward the saddle unit. When the leading edge of the paper stack reaches the folding
position sensor (PI10), the finisher controller PCB drives the delivery motor a specified
number of motor pulses to stop the center of the paper stack (stitching position) at the
stapler's staple position. Before the paper stack passes through the stack feed rollers, the
feed motor (M1) is driven to rotate the stack feed roller (lower) so that the leading edge of
the paper stack is not bent.
Stack delivery roller
(lower)
COPYRIGHT © 2001 CANON INC.
Chap02.p65
Stack delivery roller (upper)
Paper stack
F02-503-01
2000 2000 2000 2000
CANON SADDLE FINISHER G1 REV.0 MAR. 2001
43
CHAPTER 2 OUTLINE OF OPERATION
Fold position sensor
Stack feed roller (lower)
3/28/01, 12:07 PM
2-43
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