Saddle Unit - Xerox Paser 7400 Service Manual

Saddle Unit

The Saddle Unit stitches (center staples) up to 50 sheets (middle 2-point), then folds
the stack in two in the Finisher. The Finisher Controller Board receives commands
from the printer to control the following operations:
a. Paper feed in - After alignment on the processing tray, the feed drive system
inserts a stack of sheets between the stack delivery rollers. As the stack
delivery rollers rotate, the stack is fed toward the saddle unit.
b.
Stitching - When the center of the paper stack (stitching position) reaches
the stapler's staple position, the unit staples the paper stack. When only one
sheet is fed from the printer, the next step (stack feed) occurs without
performing the stitching operation.
c.
Stack Feed - The stack feed rollers feed the paper stack to the stack folding
and delivery position where the center of the stack (stitched position) is level
with the paper-pushing plate and paper-folding roller.
d. Folding/Delivery - The paper pushing plate pushes the center of the paper
stack inward to feed it toward the paper fold rollers. The paper fold rollers
and bind delivery rollers then deliver the paper stack to the bind tray (
a) Paper Feed-In
2-8
d) Folding/Delivery
e) Bind Tray
Phaser 7400 Color Printer Options Service Manual
b) Stitching
c) Stack Feed
e
s7400-141
).