Cartridge and printing material supply system

An ink cartridge for mounting on an ink jet printing apparatus, the ink jet printing apparatus comprising a plurality of apparatus-side contact forming members constructed and arranged to apply elastic force to the ink cartridge when the ink cartridge is pressed against said apparatus-side contact forming members, the ink jet printing apparatus also comprising an apparatus-side lever having an apparatus-side engagement portion, the ink cartridge, comprising:

• a cartridge body including a plurality of external surfaces and an ink chamber for storing ink, wherein the cartridge body does not include an elastic lever having an engagement portion to engage the apparatus-side lever;
• an electrical device;
• an ink supply structure adapted and configured to supply ink from the ink chamber to the ink jet printing apparatus, the ink supply structure defining a mounting direction leading edge, the mounting direction leading edge defining a leading edge plane of the ink cartridge;
• a terminal bearing structure located at an external portion of the cartridge body, the terminal bearing structure having a plurality of electrically conductive terminals coupled to the electrical device, the terminals adapted and arranged on the terminal bearing structure to make contact with and receive elastic force from the contact forming members when the ink cartridge is mounted on the printing apparatus, the terminals arranged substantially in a terminal plane which is neither parallel nor perpendicular to the leading edge plane;
• a first restriction portion including a first engagement portion having a first locking surface facing a direction opposite the mounting direction, adapted and positioned to engage with the apparatus-side engagement portion of the apparatus-side lever, so as to restrict movement of the ink cartridge in a direction opposite the mounting direction, the first engagement portion located adjacent the terminal bearing structure;
• and
• a second restriction portion on an opposite location of the ink cartridge than the first restriction portion having a second locking surface facing a direction opposite the mounting direction, adapted and positioned to engage with a respective portion of the printing apparatus, the second restriction portion located farther from the leading edge plane than the terminals when the distances are measured in a direction orthogonal to the leading edge plane.