A liquid-jetting head comprising a plurality of liquid-jetting-pressure-generating elements and a plurality of liquid-jetting orifices opposite to said elements through a liquid passage is characterized in that said passage is divided into at least two groups, and the adjacent elements of said elements...http://www.google.fr/patents/US4611219?utm_source=gb-gplus-shareBrevet US4611219 - Liquid-jetting head
