Canon Finisher-AB1 Service Manual page 280

2) Thereafter, the lead edge of the paper is held down by the paper positioning plate. At the same time, the pull-
in roller stops to rotate and moves away.
[1]Paper
[2]Pull-in roller
[3]Aligning plate
[1]
[2]
[3]
[4]
[5]
F-3-38
[4]Paper positioning plate
[5]Vertical path assembly
Chapter 3
3-41