Sharp BP-1200S Optional Units Manual page 77

3. Turn it over as the handle is at the moved position
and take out the Staple Cartridge from the unit.
4. Remove the staples that stick out from the Staple
Cartridge.
Please be very careful not to hurt your fingers, etc. when separating staples.
5. Insert the Staple Cartridge into the unit.
Caution
77
Finisher