Patent ID: 8272724

Claim:
A liquid container comprising: a case; a liquid chamber formed in the case, and configured to store liquid therein; a liquid supply portion configured to supply the liquid from the liquid chamber to an exterior of the case; an air introduction portion configured to introduce air from the exterior of the case into the liquid chamber; wherein the air introduction portion comprises: an air communication passage formed in the case, wherein the liquid chamber is configured to be in fluid communication with the exterior of the case through the air communication passage, wherein the air communication passage has an air communication end, and extends from the air communication end to the liquid chamber, wherein the air communication end is open to the exterior of the case; a blocking member positioned in the air communication passage, and configured to block the air communication passage; a movable member positioned in the air communication passage between the air communication end and the blocking member, and configured to move toward the blocking member while contacting a wall defining the air communication passage, such that blockage of the air communication passage by the blocking member is released, wherein the movable member comprises an air passage formed therethrough, and the air passage is in fluid communication with the air communication passage; and a gas-permeable film positioned on the movable member, and closing the air passage.