A mosaic recorder having a plurality of nozzles for ejecting recording liquid droplets on a moving recording medium for punctiform representation of characters and images, each nozzle having a piezoelectric transducer associated therewith and said nozzles being arranged in a recording head adjacent to...http://www.google.es/patents/US4409602?utm_source=gb-gplus-sharePatente US4409602 - Mosaic recorder with improved nozzle structure
