Ricoh SR5090, Field Service Manual

Page: 52 / 107

1.Detailed Descriptions
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the center of the stack, using pressure from a large spring. Center folding begins when the fold plate [B]
pushes into the center of the stack.
The movement of the fold plate cam stops the fold plate [C] and this holds the center of the stack out in
the folded position. The fold roller [B] applies pressure to the protruding stack and moves it toward the
left as shown below. Next, when the fold plate cam HP Sensor [A] goes on twice (the cam rotated
twice), saddle shaping is half finished, and the fold roller unit is at position [D]. The press fold motor
switches into reverse. At the same time, in the upper path, the top of fold roller unit reverses, releasing
pressure on the fold.
When the fold roller unit [C] releases pressure and starts to reverse, the top of the side-to-side fold
roller presses on switch plate 2 [D] which directs it down into the lower path. When pressure is applied
to the remaining part of the stack, fold roller [A] returns to the home position, detected by the fold plate
HP sensor [B].