A liquid delivery system for delivering inks of three or more different colors or densities or dye-forming reactive components comprising multiple liquid reservoirs, liquid bladders, and valves that permit (a) total interruption of liquid flow, (b) liquid flow from reservoirs to bladders and (c) flow...http://www.google.fr/patents/US4885595?utm_source=gb-gplus-shareBrevet US4885595 - Multicomponent refillable toner delivery system
