An ink cartridge using an ink bag capable of being mounted in a carriage, comprising: a container having a body unit 1 and a cover unit 3 to form an internal space therebetween, at least one of said body unit and said cover unit being provided with valves 10 and 11 openable for communication between...http://www.google.com/patents/US5896151?utm_source=gb-gplus-sharePatent US5896151 - Ink cartridge for an ink jet printer
