Patent ID: 7284849

Claim:
An ink cartridge, comprising: an ink chamber comprising a wall having a first end and a second end opposite the first end; a translucent portion extending from the wall, wherein the translucent portion has an inner space formed therein, and the inner space is configured to be in fluid communication with the ink chamber; an ink supply portion having an opening formed therethrough, wherein the ink supply portion is positioned at the wall adjacent to the second end of the wall, and the translucent portion is positioned between the first end of the wall and the ink supply portion; a movable member, comprising: a signal blocking portion, wherein the signal blocking portion is disposed within the inner space of the translucent portion; and a float portion disposed within the ink chamber; and at least one guide, wherein the movable member is configured to move between a first position and a second position based at least on an amount of ink disposed within the ink chamber, wherein when the moveable member moves from the first position to the second position at least a portion of the moveable member slides on and along the at least one guide, wherein as the ink within the ink chamber is dispensed from the interior of the ink chamber to the exterior of the ink chamber a surface of the ink within the ink chamber moves in a predetermined direction, and when the moveable member moves from the first position to the second position the movable member moves in a direction which is slanted with respect to the predetermined direction.