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When all sheets have been output, the two stitchers stitch the stack. The stitchers are positioned

so that they face the center of a stack.

The two stitchers are not operated simultaneously so as to prevent the paper from wrinkling

between two staples and to limit the load on the power supply.

If only one sheet of paper arrives from the host machine, stitching does not take place and the

sequence goes to the next operation (stack feeding).

Stitcher

Staple

The unit folds the stitched stack of sheets, and then feeds it to the point of delivery. This point

is where the center of the stack, i.e., stapling position, matches the height of the paper pushing plate
and the paper folding roller nip.

The stack is moved forward by operating the paper positioning plate. When the plate is oper-

ated, the guide plate which has been covering the paper folding rollers, also moves down so that the
paper folding rollers directly face the stack.

Paper folding roller

Guide plate

Paper positioning plate

Paper pushing guide

The paper pushing plate pushes against the center of the stack to move it in the direction of the

paper folding rollers. In response, the paper folding rollers pick the stack along its center and fold
it in two. The paper folding rollers together with the delivery roller then move the stack along to
output it on the delivery tray.

Delivery roller

Paper folding 
roller

The paper output mechanism serves to keep a stack of sheets coming from the finisher in place

for the next steps (stapling, folding).

The paper inlet is equipped with the No.1 flapper and the No.2 flapper, which operate to con-

figure the paper path to suit the size of paper. The paper positioning plate is kept in wait at a
predetermined location to suit the size of paper. The paper positioning plate is driven by the paper
positioning plate motor (M4S), and the position of the plate is identified in reference to the number
of motor pulses coming from the paper positioning plate home position sensor (PI7S). A sheet
moved by the inlet roller is handled by the feed rollers and the crescent roller and held in a predeter-
mined position. The feed plate serve to move sheets by coming into contact with or moving away
from sheets as needed.

The alignment plates put the stack into order each time a sheet is output. The alignment plates

are driven by the alignment motor (M5S), whose position is identified in reference to the number of
motor pulses coming from the alignment plate home position sensor (PI5S).

To prevent interference between paper and the paper folding rollers when the paper is being

output, the folding rollers are designed to be covered by a guide plate. The guide plate moves down
before paper is folded so as to expose the paper folding rollers.

The inlet is equipped with the No.1, No.2 and No.3 paper sensors (PI18S, PI19S, PI20S) each

suited to a specific paper size, and the paper positioning plate is equipped with a paper positioning
plate paper sensor (PI8S).