Ricoh K-C3.5L Service Training page 131

Model K-C3.5L
Overview
Feeds originals past the DF exposure glass while
scanning
Inverter unit allows duplex copying and stacking in
the correct order after scanning
The DF exposure glass is a narrow glass to the left
of the exposure glass.
The ARDF does not use the main exposure glass,
unless the user selects book mode and places the
originals on the glass (in which case, the ARDF
mechanism isn't used - just the cover).
Slide 131
No additional notes.
131