An inkjet drop ejection apparatus comprises an array of ink ejection nozzles; a chamber corresponding to each ink ejection nozzle and for storing ink; and a plurality of actuators provided on top of each chamber, the actuators radially extending out from a common center and defining an ink ejection port...http://www.google.fr/patents/US7891775?utm_source=gb-gplus-shareBrevet US7891775 - Inkjet drop ejection apparatus with radially extending thermal actuators
Inkjet drop ejection apparatus with radially extending thermal actuators
