Canon NP6621 Service Manual page 123

6. The set-back rollers 1 rotate clockwise, thereby pulling the trailing edge of the second copy paper out the
duplexing unit inlet.
7. The set-back rollers 1 and 2 rotate counterclockwise, and the leading edge of the second copy paper stops
at a point about 12 mm past the set-back roller 1.
8. Operations 4 through 7 are repeated for as many times as there are copies to make, and the copies are
stacked in the duplexing unit.
COPYRIGHT © 1998 CANON INC.
Set-back rollers
Figure 3-418
12mm 12mm
Figure 3-419
CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
OPERATIONS AND TIMING
12mm
3–67