Patent ID: 7559637

Claim:
A set of plurality of ink cartridges, wherein: each of the ink cartridges comprises: a first wall; an ink supplying part positioned at the first wall; a projection; a first member; and a second member connected to the first member; the cartridges have different patterns from each other in positional relationship among the ink supplying part, the projection and a center of the first wall, as seen from a direction perpendicular to the first wall; the projection is provided at the first member and the first wall is provided at the second member; the first member is common to each of the ink cartridges and the second member is common to each of the ink cartridges, and a positional relationship between the first member and the second member is different among the plurality of ink cartridges; and the first member has a first central axis and a rotational configuration of the first member with respect to the second member around the first central axis is different among the plurality of ink cartridges.