An anti-clogging nozzle system for a continuous jet ink jet printer is disclosed. A printing nozzle has both an ink inlet and an ink outlet permitting constant ink flow behind the nozzle orifice during printing. A pressure sensor monitors the ink flow and signals clogs to an automatic unclogging system....http://www.google.de/patents/US5980034?utm_source=gb-gplus-sharePatent US5980034 - Cross flow nozzle system for an ink jet printer
