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Paper Fold System
The paper fold mechanism consists of a guide plate, paper fold rollers, and a paper
pushing plate. The Staple/Fold Motor drives the guide plate, paper-fold rollers, and
paper-pushing plate. A combination of gears and cams transfer the drive force while
the Staple/Fold Motor Sensor monitors the operation.
Until the paper stack reaches the folding position, the guide plate covers the paper
fold rollers to act as a paper path through which the paper stack feeds into the Saddle
Unit, preventing the paper stack from touching the rollers. A Folding Home Position
Sensor detects the positions of the paper-fold rollers and paper-pushing plate.
The bind delivery rollers deliver and folds the paper stack with the paper fold rollers.
The Staple/Fold Motor drives the bind delivery rollers. A Bind Tray Sensor on the
bind tray can then detect the presence of the paper stack.
Paper Stack
Paper Fold
Roller (Upper)
Paper Fold Roller (Lower)
Saddle Unit Components
Component
Stack feed rollers
Paper pushing plate
Stapling mechanism
Swing guide
Theory of Operation
Cam
Function
Rotates to feed the stacking mechanism.
Pushes the center of the paper stack toward the feed rollers.
Performs stitching (term for center punching).
Places the paper stack between the delivery rollers.
Sensor Flag
Folding Home
Position Sensor
Paper Pushing Plate
s7400-148
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Troubleshooting
