12.6.2 Paper Feed System
While paper is being stacked in the duplex tray, the paper flatteners [A]
correct curl at the leading edge of the paper.
After all the paper has been stacked in the duplex tray, the jogger fences
square the paper stack and the duplex feed motor rotates counterclockwise
briefly to prepare to feed the paper from the duplex tray. At this time, the
bottom plate rises and the duplex feed rollers [B] move the flip mylars [C]
back to the right (front view).
The duplex paper feed system consists of three sets of duplex feed rollers
and a friction roller [D]. As the friction roller has a one-way bearing inside, it
rotates freely during paper stacking and locks during paper feeding. The
duplex feed rollers can feed only the top sheet of the stack because the
friction rollers function in the same way as a friction pad does.
After that, the second side copies follow the upper paper tray feed station
paper path.
After the duplex tray feeds out the final copy, the paper end feeler [E] drops
through a slot in the duplex bottom plate. The duplex paper end actuator [F],
which is on the same shaft as the duplex paper end feeler, pivots into the
duplex paper end sensor [G]. The sensor sends the signal to the CPU to
stop the next paper feed cycle.
For a diagram of the paper feed path, see "Paper Path - Duplex Copying" in
the Overall Machine Information section.
[E]
[F]
[G]
[D]
[C]
[A]
[B] [B]
[A]
Detailed
Descriptions
STM 2-103 A156/A160/A162
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