Canon DADF-B1 Service Manual page 55

CHAPTER 2 BASIC OPERATION
13. When the pre-registration sensor (U502) detects the trailing edge of the next original (OFF), the
feed motor (M2) slows down and stops as soon as the trailing edge of the original reaches the
image leading edge position.
When the reversal delivery inlet sensor (SR4) detects the leading edge of the first original (ON)
and the original is then moved over a specific distance, the reversal delivery motor (M3) slows
down and stops as soon as the original reaches the original delivery tray.
The reversal delivery motor stops once, and rotates clockwise for a limited time so that the
reversal delivery flapper closes.
4. Mixed Sizes
The ADF allows placement of originals of different sizes (but of the same configuration width).
Regardless of whether they are small- or large-size, the second original is sent to the copyboard glass
only after the first original has been delivered. The mode of operation is the same as the mode used
for large-size paper or the last of double-sided copying.
5. Jam Removal Mode
When a jam occurs, the originals that may have been copied and that remain on the copyboard
glass are moved without specific operation. The flow of originals is the same as when making single-
sided copies, but scanning does not take place.
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COPYRIGHT © 1999 CANON INC. CANON DADF-B1 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Figure 2-277