Inventors:
Jon Fong - San Diego CA
David Hunt - San Diego CA
Michael Borer - San Diego CA
Assignee:
Hewlett-Packard Company - Palo Alto CA
International Classification:
B41J 2175
Abstract:
The invention relates generally 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. A mass of porous capillary material disposed in an ink supply passageway provides a capillary valve which prevents flow of ink when one side of the valve is unwetted.