Patent ID: 6759085
Filing Date: 2004-07-06
Classification: B05B,C23C

Abstract:
A method of spraying particulate matter on a workpiece, comprising the steps of:providing a spraying orifice adjacent a workpiece to be sprayed; providing particulate matter under pressure to the spraying orifice; providing an inert gas under pressure to the spraying orifice to establish a static pressure at the spraying orifice and provide a spray of particulate matter and gas onto the workpiece; and locating the spraying orifice in a region of low ambient pressure which is less than 1 atmosphere and which is substantially less than the static pressure at the spraying orifice to provide substantial acceleration of the spray of particulate matter and gas onto the workpiece and so that the gas exiting the spraying orifice has a temperature substantially at an ambient temperature outside the spraying orifice upon exiting the spray orifice.