An electrothermal ink jet print head is constructed in layer structure, wherein the expansion direction of the ink vapor bubble is directed opposite to the ink-ejection direction. Each ink channel (16) of the ink jet print head is supplied with ink by flow throttles for a highest degree of effectiveness....http://www.google.fr/patents/US5502471?utm_source=gb-gplus-shareBrevet US5502471 - System for an electrothermal ink jet print head
