A coating machine 3 serving as a rotary atomizer comprises a hollow unrotary paint nozzle shaft 5 provided in the center of a motor shaft 10 serving as its rotary shaft. The paint nozzle shaft 5 is provided at a tip thereof with a gun-spray paint nozzle 5g and a gun-spray air nozzle 5f on the outside...http://www.google.fr/patents/US7143963?utm_source=gb-gplus-shareBrevet US7143963 - Rotary atomizer and coating method by it
