Switch Back Mechanism - Ricoh FT8680 Service Manual

31 July 1995

16.12 SWITCH BACK MECHANISM

[B]
[E]
[D]
To return the inverted originals to their original page order, the originals are
inverted again and traveled to the switch back tray [A] before being fed-out
from the document feeder.
When the inversion signal is received from the copier, the inverter solenoid
turns on to open the upper and lower inverter gates [B]. At the same time, the
switch back gate solenoid [C] turns on to lower the switch back gate [D]. (If
the next original has been set on the original table, the feed-in motor also
turns on.) After 175 ms, the belt motor and the inverter motor turn on to
transport the original to the switch back tray.
When the inverter entrance sensor [E] senses the trailing edge of the original,
the inverter gate solenoid turns off to close the inverter gates. When 54
pulses from the inverter motor encoder are counted after the inverter
entrance sensor senses the trailing edge, the inverter motor starts reversing
to feed-out the original from the machine.
An inverter jam sensor [F] (a reflection-type photosensor) is installed inside of
the switch back path to detect any remaining paper.
[A]
[F]
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[C]
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