An apparatus for ejecting droplets includes an actuator which applies ejection pressure to a pressure chamber which stores ink; a nozzle communicating with the pressure chamber and capable of ejecting a main droplet having a trajectory and a satellite droplet having a volume smaller than the main droplet...http://www.google.fr/patents/US7954916?utm_source=gb-gplus-shareBrevet US7954916 - Droplet ejecting apparatus for forming dots on a medium
Droplet ejecting apparatus for forming dots on a medium
