US Patent 7944910 Ink cartridges and systems having such ink cartridges

An ink cartridge includes a case, an ink supply portion, an air intake portion, and at least one resilient member. The ink supply portion is positioned at a front face of the case, and the ink supply portion is configured to dispense ink from an interior of an ink chamber to an exterior of the ink chamber. The air intake portion is configured to draw air into the ink chamber. The at least one resilient member has a first portion positioned at the front face of the case and a second portion which is positioned a predetermined distance away from the front face of the case in a predetermined direction away from the ink chamber. The resilient member extends from the front face of the case further than the ink supply portion in the predetermined direction.