Ricoh A028 Service Training Manual page 13

Outline of Mechanism
Duplex original to duplex copy or simplex copy mode
In these modes, the original is set with the image side
down on the original table and is transported as shown.
The original is stopped on the exposure glass and the
front side of the original is exposed first. After exposure,
the original is sent to the reversing unit where it is
switched back.
After the reversing unit, the junction gate pawls are
switched and guide the original to the intermediate
transport. The original is sent back to the exposure glass
again where the reverse side is exposed. After the
second exposure, the original is transported to and
through the reversing unit and is returned with the image
side down to the original table.
RDH mode (sort mode)
Simplex original to simplex copy mode
One original feeding cycle makes one set of copies. To
make more sets of copies, originals recirculate in the
RDH accordingly. (Copies are always collated into sets.)
The original motion in the RDH is just like the simplex
original to simplex copy or duplex copy mode with the
stack mode. However, when one original feeding cycle
is finished, the recycle arm is detected then is soon
placed on the top of the original stack. The next original
feeding cycle is continued without pausing the copy run.
When copy delivery to the finisher is selected, the copies
are inverted in the finisher in order to stack the copies
with the image side down on the shift tray. The copies
are stacked in page order.
When one original is set in the stack original feed table,
the original is recirculated once, as usual. Then, the
machine detects that only one original has been set. The
original is again fed from the table, then the machine
enters the original non-recirculating mode (ADF mode)
to complete copying. The original stays on the exposure
glass until the copy run finishes.
Junction gate
pawls
1-10
1 July 1994
Intermediate transport