Double Folding A Stack - Sharp AR-FN8 Service Manual

4.

Double Folding a Stack

To fold a stack consisting of 10 or more A4-R or LT-R sheets, folding is executed twice for the
same sheet.
The paper folding rollers rotate in reverse for an equivalent of 20 mm after gripping the stack
for a length of 20 mm, enabling the paper folding rollers to apply an increased degree of pressure
along the crease on the stack. Then, the paper folding rollers rotate normally, and the paper pushing
plate returns to its home position while the stack is being delivered.
This way, a stack requiring a large force may properly be folded with less pressure.
1) The paper pushing plate pushes the stack in the direction of the paper folding rollers.
2) The paper folding rollers grip the stack for a length of about 20 mm.
CHAPTER 3 SADDLE STITCHER UNIT BASIC OPERATION
M2S
Paper folding motor
Paper folding roller
Figure 3-507
M2S
Paper folding motor
Figure 3-508
Paper pushing plate
M8S
Paper pushing plate motor
3-37