Cartridge and printing material supply system

摘要

A cartridge comprises: a printing material container; a printing material supplier that supplies a printing material contained in the printing material container to a printing device; a first surface and a second surface that are opposed to each other; a third surface that intersects with the first surface and the second surface; a fourth surface that is opposed to the third surface; a cartridge-side engagement structure that is provided on the third surface at a position closer to the first surface than the second surface and is configured to be engaged with a device-side engagement structure of the printing device; and contact portions that are provided in an area where both an end of the first surface proximate to the fourth surface and an end of the fourth surface proximate to the fist surface are located and are configured to be in contact with the printing device. A contact surface defined by the contact portions is inclined to the fourth surface.