HP LaserJet 3055 - Manual (Page 211)

Clearing stapler jams
To reduce the risk of staple jams, make sure that you staple 20 or fewer pages of media (80 g/m 2 or
20 lb) at a time.
To clear a staple jam from the convenience stapler
1. Turn off the HP LaserJet 3392 all-in-one, and then open the stapler door.
NOTE Opening the stapler door disables the stapler.
2. Remove the staple cassette from the all-in-one.
3. Clear any loose staples from the stapler and from the staple cassette.
ENWW Clearing stapler jams 193