A printhead having reduced spray includes orifi from which ink is expelled by an ink ejector. The orifi employ an aperture at the outer surface of the orifice plate having an asymmetrical hourglass shape to cause the expelled ink drop to break off at the narrow end of the orifice aperture....http://www.google.com.au/patents/US6371596?utm_source=gb-gplus-sharePatent US6371596 - Asymmetric ink emitting orifices for improved inkjet drop formation
