Patent ID: 7871155

Claim:
A fluid cartridge comprising: a fluid container comprising: a fluid chamber configured to store a fluid; a first passage configured to communicate with the fluid chamber via a first opening and configured to supply the fluid from an interior of the fluid chamber to an exterior of the fluid chamber; a communication passage configured to communicate with the fluid chamber via a second opening and comprising a third opening opposite the second opening; a first flexible sheet portion comprising a first surface facing an interior of the fluid container, and a second surface facing an exterior of the fluid container, wherein the first surface is opposite the second surface; and a second flexible sheet portion covering the third opening and comprising a third surface facing the interior of the fluid container and a fourth surface facing the exterior of the fluid container, wherein the third surface is opposite the fourth surface, wherein the first flexible sheet portion is configured to deform when a pressure acting on the second surface is greater than a pressure acting on the first surface and when a difference between the pressure acting on the first surface and the pressure acting on the second surface is greater than or equal to a first value, and the second flexible sheet portion is configured to deform when a pressure acting on the fourth surface is greater than a pressure acting on the third surface and when a difference between the pressure acting on the third surface and the pressure acting on the fourth surface is greater than or equal to a second value, wherein the second value is greater than the first value.