Patent ID: 7318640

Claim:
An ink cartridge, comprising: a first case comprising a wall having a first end and a second end opposite the first end, wherein the wall has a first opening and a second opening formed therethrough, the first opening has a first center, and the second opening has a second center, wherein the wall has a first center line and a second center line which is perpendicular to the first center line, and each of the first center and the second center is offset from each of the first center line and the second center line; a second case enclosed within the first case; an ink supply portion extending from the second case and positioned adjacent to the second end of the wall, wherein at least a portion of the ink supply portion is configured to be received by the first opening; and a protruding portion extending from the second case and positioned at the wall between the first end of the wall and the ink supply portion, wherein at least a portion of the protruding portion is aligned with the second opening and exposed to an outside of the second case, and the protruding portion is opaque, wherein the wall further comprises a third opening formed therethrough, and the third opening has a third center which is offset from each of the first center line and the second center line, wherein the ink cartridge further comprises an air intake portion extending from the second case and positioned at the wall between the first end of the wall and the protruding portion, wherein at least a portion of the air intake portion is configured to be received by the third opening.