Canon LBP7660Cdn Manual page 68

You can open the protective bag with your hands from the notch.
Keep the protective bag. Do not discard it. You will need it when you remove the toner cartridge for printer
maintenance or other purposes.
5
Shake the toner cartridge five or six times as shown in the figure to evenly distribute the toner inside
the cartridge.
Do not remove the drum protective cover (A).
6
Place the toner cartridge on a flat surface.
7
Remove the tab, and the pull out the sealing tape.
Pull out the sealing tape (approx. 50cm long) gently.
IMPORTANT
Precautions when pulling out the sealing tape