Canon Color imageRunner C3220 Reference Manual page 499

8
Make sure that the staple case is firmly secured, and close the
upper front cover of the finisher.
CAUTION
When closing the upper front cover of the finisher, be careful not to get
your fingers caught, as this may result in personal injury.
NOTE
If there are no staples ready for stapling after the cover is closed, the stapler unit
automatically performs a "dry" stapling operation to reposition the staples.
Clearing Staple Jams
8
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