Apparatus for refilling ink cartridges

摘要

The invention generally relates to refillable ink cartridges for computer controlled ink jet printers and, more specifically, to apparatus for refilling collapsible ink bags which are maintained at sub-atmospheric pressure within such equipment. The refilling apparatus includes a fluid bridge located between the reservoir holding replenishment ink and the ink cartridge. The fluid bridge may contain either a purge valve and/or a priming valve that prevent air bubbles from being introduced into the ink bag and from obstructing the flow of replenishment ink.