US Patent 7682004 Ink cartridges

An ink cartridge includes an ink chamber, an ink supply portion, and a supply chamber positioned adjacent to the ink supply portion. The supply chamber is configured to be in fluid communication with the ink chamber and the ink supply portion, and the ink supply portion is configured to dispense ink from an interior of the ink chamber to an exterior of the ink chamber via the supply chamber. Moreover, the supply chamber has a central axis extending from an open end of the supply chamber to a closed end of the supply chamber, a wall defining a portion of the supply chamber has an opening formed therethrough, and the opening of the wall is offset from the central axis of the supply chamber.