Canon Finisher-AB1 Service Manual page 266

3)When the trail edge of paper reaches the process stopper, the machine stops the rotation of the stack delivery
roller and the paddle. The swing guide [7] is moved up.
[1]Paper
[2]Stack delivery roller
[3]Sort delivery roller
[4]Processing stopper
[7]
[1]
[6]
[2]
F-3-25
[5]Transport belt
[6]Paddle
[7]Swing guide
Chapter 3
[5]
PS6
[3]
3-27