Ricoh Aficio MP C3001 Service Manual page 1506

Stacking for Booklet Stapling
2.9.3 LONGER THAN 8.5 X 14 INCHES
At the start of the set, the stapler moves to the center position. At this position, a bracket [A]
on the stapler unit pushes stopper L [B]. The pawl [C] on the stopper L assembly then
moves into position to catch the paper. The upper clamp roller holds the stack (see the
previous section).
When the stack is complete, the stapler moves to the rear-side position, and stopper L
moves away. The machine feeds the stack to the correct position for stapling.
B793 54 SM