Patent ID: 7806074

Claim:
A coating machine having a rotary atomizing head in which a coating material chamber for receiving supply of a coating material is formed on the rear side of a bell main body fitted to a rotary shaft of the coating machine, and a substantially frustoconical rim is formed on the frontal side for spreading the coating material caused to flow from the coating material chamber by a centrifugal force and atomizing the same at the top end thereof characterized in that a plurality of substantially frustoconical rims are fitted being overlapped in plurality each at a predetermined clearance to the rotary atomizing head, and each of the clearances is opened to the peripheral surface of the coating material chamber; wherein the rear side of an inner bell is fitted to the front side of the bell main body and the coating material chamber and the inner bell is provided stepwise with slopes in view of the cross section along the center of rotation for blowing out the coating material supplied to the coating material chamber to each of the clearances by a centrifugal force.