A method of refilling an ink jet cartridge with ink. The cartridge has a housing which encloses an internal ink reservoir extending between top and bottom ends thereof, an ink fill aperture extending through the housing near its top end, and a means for sealing the ink fill aperture. The cartridge further...http://www.google.es/patents/US5488400?utm_source=gb-gplus-sharePatente US5488400 - Method for refilling ink jet cartridges
