Patent ID: 7244071

Claim:
A printer comprising: a printing head that prints on a print medium; a print medium drive mechanism that moves the print medium relative to the printing head; and an installation section having a rectangular storage area in which a first print medium cartridge and a second print medium cartridge are selectively installable, each of the first print medium cartridge and the second print medium cartridge containing the print medium wound around a winding axis, the first print medium cartridge having a first rectangular shape having a first longitudinal axis, the second print medium cartridge having a second rectangular shape having a second longitudinal axis, the second longitudinal axis being longer than the first longitudinal axis to form a different outline of a cross section perpendicular to the winding axis from that of the first print medium cartridge, the first print medium cartridge including a pair of two side faces opposing each other and a bottom surface between the two side faces along the first longitudinal axis, the second print medium cartridge including a pair of two side faces opposing each other and a bottom surface between the two side faces along the second longitudinal axis, and the bottom surface of the first print medium cartridge and the bottom surface of the second print medium cartridge being completely within the rectangular storage area when either of the first print medium cartridge or the second print medium cartridge is installed in the installation section.