Patent ID: 7284848

Claim:
An ink cartridge, comprising: a first wall having a first end and a second end opposite the first end; a second wall opposite the first wall, wherein the second wall has a first end and a second end opposite the first end; an ink chamber; an ink supply portion positioned at the first wall; a translucent portion positioned at the first wall between the first end of the first wall and the ink supply portion; a communication path coupled to the ink supply portion and the ink chamber, wherein the ink supply portion is configured to dispense ink from an interior of the ink chamber to an exterior of the ink chamber via the communication path; at least one third wall which is substantially perpendicular to the second wall; a fourth wall which is substantially perpendicular to each of the second wall and the at least one third wall, wherein an area of the at least one third wall is greater than each of an area of the first wall, an area of the second wall, and an area of the fourth wall, and the at least one third wall has a recess formed therein, wherein the recess is adjacent to the fourth wall, and at least a portion of the recess intersects the fourth wall, wherein the recess extends from the first wall towards the second wall, and a plane which is parallel to the communication path and the fourth wall intersects at least a portion of the recess and at least a portion of the communication path; and a signal blocking portion, wherein the translucent portion has an inner space formed therein, and the signal blocking portion is disposed within the inner space of the translucent portion, wherein the signal blocking portion is configured to move within the inner space of the translucent portion based at least on an amount of ink disposed within the ink chamber.