Patent ID: 7419254
Filing Date: 2008-09-02
Classification: B41J

Abstract:
1. An ink cartridge, comprising: a case having at least a portion of an ink chamber defined therein, wherein the ink chamber is configured to store ink; an ink supply portion positioned at the case, wherein the ink supply portion is configured to dispense ink from an interior of the ink chamber to an exterior of the ink chamber; an air intake portion positioned at the case, wherein the air intake portion is configured to draw air into the ink chamber; a movable member configured to move between a first position and a second position relative to the case, wherein the movable member comprises a first face and a second face opposite the first face of the movable member, and the first face of the movable member is positioned further from the case than the second face of the movable member is positioned from the case; and at least one resilient member having a first end which is coupled to the case and a second end which is coupled to the movable member, wherein the at least one resilient member is configured to expand in an expansion direction and to contract in a contraction direction opposite the expansion direction to move the movable member relative to the case between the first position and the second position, and a shape of the case in the expansion and contraction directions is unaltered when the at least one resilient member expands and contracts, wherein the entire moveable member is configured to substantially simultaneously move in a first direction relative to the case when the at least one resilient member expands, and the entire moveable member is configured to substantially simultaneously move in a second direction opposite the first direction when the at least one resilient member contracts, wherein the at least one resilient member applies a biasing force to the movable member to bias the movable member in the expansion direction to bias the movable member into the first position, wherein the case has a front face and a rear face opposite the front face, and the ink supply portion is positioned at the front face of the case, wherein the movable member moves from the first position to the second position when a predetermined amount of force greater than the biasing force is applied to the first face of the movable member, and when the predetermined amount of force is released from the first face of the movable member the movable member from the second position to the first position, wherein a distance between the second position and the front face of the case is less than a distance between the first position and the front face of the case.