Canon C9075 PRO Operating Manual page 193

6
Gently push the staple case back into the stapler unit until it is securely in place .
7
Close the front cover of the finisher .
Staple Finisher-B1
When closing the front cover of the finisher, be careful not to get your fingers caught, as this may result in personal injury .
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.
Booklet Finisher-B1
2-105
Clearing Staple Jams
2