Canon FINISHER - D1 Service Manual page 67

2. Operation
When multiple sheets are stacked on tray B, the leading edge of the stack tends to bend down,
and would flap down if the stack was moved halfway off the processing tray, preventing the sheets to
move against the stopper despite tapping by the paddles and, ultimately, causing the following:
a. Poor alignment of sheets in feeding direction at time of stapling
b. Poor alignment of sheets in feeding direction at time of an offset job (on tray B)
To prevent the above, the DC controller PCB slides the tray auxiliary plate outside the machine
while sheets are being placed on the processing tray. With the tray auxiliary plate supporting the
sheets from below, the stack will lie straight maintaining correct alignment.
Since the tray auxiliary plate is retracted when discharging stacks, it will not affect delivery. The
plate is slid out once again when the next sheet is placed on the processing tray (after detecting the
paper surface to prevent interference with detection).
COPYRIGHT © 1999 CANON INC.
Existing
stacks
Tray B
Figure 2-402 (Tray Auxiliary Plate Retracted)
Existing
stacks
Tray B
Figure 2-403 (Tray Auxiliary Plate Out)
CANON FINISHER - D1 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 2 OPERATIONS
Sheets on the
processing tray
Tray auxiliary plate
2-41