Operation - Canon SADDLE FINISHER K3 Service Manual

CHAPTER 2 OPERATION OVERVIEW

4.1.2 Operation

When multiple sheets are stacked on tray B, the leading edge of the stack tends to bend
down. If the sheets were pushed out of the processing tray in this condition, the leading edge
would sag. Therefore, even if the paddle strikes the face of the sheet, the sheet does not butt
against the stopper, which results in the following:
a. Poor alignment of the sheets in feeding direction when stapling.
b. Poor alignment of sheets in feeding direction during offset job processing (on tray B).
To prevent this from happening, the finisher controller PCB slides the tray auxiliary plate
outside the machine while sheets are being placed on the processing tray. With the tray aux-
iliary plate support the sheets from below, the stack will lie straight, maintaining correct
alignment.
Since the tray auxiliary plate is retracted when delivering stacks, it will not affect delivery.
The plate is slid out again when the next sheet is placed on the processing tray (after detect-
ing the paper surface to prevent interference with detection).
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COPYRIGHT© 2001 CANON INC.
Existing
stacks
Tray B
F02-401-02 (Tray Auxiliary Plate Retracted)
Existing
stacks
Tray B
F02-401-03 (Tray Auxiliary Plate Out)
2000 2000 2000 2000
Sheets on the
processing tray
Tray
auxiliary
plate
CANON SADDLE FINISHER K3/K4 REV.0 MAR. 2001