The third sheet is fed over the stack, and then the aligner paddles push the third sheet to the aligners. Succeeding
sheets are individually fed and aligned in the same manner as the third sheet.
For staple jobs, the trailing edge of the stack is stapled. For two-point staple jobs, the motor (SHPF aligner) drives the
aligner shaft to prevent the front and rear aligners from interfering with the staple unit.
SHPF stapling operation
The motor (SHPF staple unit carriage) controls the movement of the staple unit carriage. The sensors determine the
location of the carriage along the rail. The carriage moves according on the number of staples required.
4021, 7421
Appendix C: Theory of operation
659
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