Canon Color Bubble Jet BJC-1000 Series User Manual page 70

Remove the
BJ cartridge.
Store or
dispose of the
BJ cartridge.
4-12 Maintaining the Printer
Lift the blue lock lever on the cartridge holder.
Slide the BJ cartridge out of the holder.
If you are replacing an old BJ cartridge, dispose of the old
cartridge properly.
If you are switching cartridges, you must store the
cartridge you are removing in the Ink Cartridge
Storage Box.
Chapter 4