| 摘要 |
An advantageous improvement (10, 12) as to reduction of particle size of painting and coating particles is achieved by providing a tapered channel(s) (36, 36<u>x</u>) in the cylindrical wall (30) radially of the spray apparatus' nozzle head (14), which is a wall adjacent the nozzle outlet slit (34) of prior art apparatus. As a novel application of the "Bernoulli Principle", its venturi feature achieves a movement and acceleration of ambient air to intermix with the paint particles being dispensed through the nozzle outlet slit (34). The tapered channel(s) (36, 36<u>x</u>) extends radially inwardly from an air inlet opening (38, 38<u>x</u>) on the exterior face of the wall (30), fully through the wall (30), and into a downstream air outlet opening (40, 40<u>x</u>) on the interior of the wall face, the tapering of the channel (36, 36<u>x</u>) being of a downstream size-reducing nature.
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