In general, in a first aspect, the invention features a droplet deposition system, including a jetting assembly comprising one or more modules capable of ejecting droplets, a plurality of conduits in fluid communication with the jetting assembly, and a valve coupled to the conduits and adjustable between...http://www.google.de/patents/US7281785?utm_source=gb-gplus-sharePatent US7281785 - Fluid handling in droplet deposition systems
