Patent ID: 7950788

Claim:
A printing device comprising: a supply of colorant independent of any print cartridge insertable into the printing device; and, a mechanism receptive to removable insertion of a first print cartridge and a second print cartridge, where either one of the first print cartridge and the second print cartridge can be inserted into the mechanism at any given time; wherein the first print cartridge at least ultimately uses the supply of colorant of the printing device to form the images on the media, wherein the second print cartridge has a self-contained supply of colorant that is exclusively used in lieu of the supply of colorant of the printing device to form the images on the media even though the supply of colorant independent of any print cartridge insertable into the printing device is present, and wherein the printing device is adapted to form the images on the media using the supply of colorant independent of any print cartridge insertable into the printing device when the first print cartridge is inserted into the mechanism and to form the images on the media using the self-contained supply of colorant contained within the second print cartridge when the second print cartridge is inserted into the mechanism.