A method and apparatus for producing a very fast succession of identical well-defined drops, driven at very high speed, in which a jet of liquid which is divided into droplets by high-frequency vibration is produced at very high speed....http://www.google.fr/patents/US3983740?utm_source=gb-gplus-shareBrevet US3983740 - Method and apparatus for forming a stream of identical drops at very high speed
Method and apparatus for forming a stream of identical drops at very high speed