A thermal ink jet printhead with an array of nozzles 3, each nozzle having heater elements 10 disposed in a bubble forming chamber 7. The bubble forming chambers 7 having circular cross sections. For example, the chambers 7 are cylindrical, spherical, barrel-shaped or truncated cone shaped. The circular...http://www.google.fr/patents/US7287836?utm_source=gb-gplus-shareBrevet US7287836 - Ink jet printhead with circular cross section chamber
Ink jet printhead with circular cross section chamber
