An ink cartridge includes a flexible bag filled with a liquid ink, and a cartridge housing that holds the bag. The bag is filled to a predetermined percentage of its full volume to fill the bag to less than its capacity in order to prevent the bag from rupturing, but is filled sufficiently to substantially...http://www.google.de/patents/US20040036749?utm_source=gb-gplus-sharePatent US20040036749 - INK CARTRIDGE HAVING INK SUPPLY BAG FILLED TO LESS THAN CAPACITY AND FOLDED IN CARTRIDGE HOUSING
