Patent ID: 6852165

Claim:
A powder spray apparatus comprising a powder spray booth having a floor, side walls and end walls, one or more powder spray devices positioned with respect to the side walls to spray articles passed through the booth via openings in the end walls, a powder recovery module comprising at least one cyclone separator having an intake disposed close to, or towards, the ceiling of the powder spray booth, an overspray intake at each end of the booth, each overspray intake being positioned close, or adjacent, to the floor of the powder spray booth and the end wall and a feed channel connecting each intake with the cyclone separator, and a scraper bar for continuously reciprocating across the booth floor between the end walls to collect powder on the booth floor and move the collected powder towards the end walls of the spray booth adjacent to which the overspray intakes are provided; wherein the powder recovery module includes suctions means for removing overspray powder from the booth and at least one exhaust duct connected to the suction means and communicating with the booth for passage of air-borne overspray powder; wherein the pipe has an opening and a cover is positioned across the opening spaced from the pipe to define therebetween the aperture.