Ricoh FT4227 Manual page 365

DUPLEX 12 February 1992
The jogger fences move inward to square the paper stack at the same timing
as before. After the last copy of the first side copying run enters the duplex
tray, the jogger fences remain against the paper stack.
In single 2-sided copying mode, the jogger motor rotates at the same time as
in the multiple 2-sided copying mode. But in this mode the jogger motor
moves the jogger fences outward.
The jogger end fence rotates down as it is pressed against the end fence
stopper [G]. The jogger side fences stay at their widest position. This clears
the paper path for inverting the copy paper.
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