Abstract: A powder spray apparatus is described including a powder booth with a scraper bar which reciprocates across the floor thereof to collect deposited overspray powder and supply it to intakes located at each end wall. The intakes are connected by a feed channel to one or more cyclone separators. An exhaust duct may also be provided for air-borne overspray powder which preferably forms part of the feed channel. Powder recovered from the cyclone separators may be passed to a common collection hopper by use of a venturi pump which transfers the powder from each separator to the hopper via a sieve located in a ventilated enclosure above the hopper.

Abstract: A powder coating material spray booth, one or more powder spray devices position to spray articles passing through the booth with powder coating material, a powder recovery module comprising a separator for separating powder coating material from air, a source of suction for drawing over sprayed powder coating material from inside the booth, an exhaust duct connected to the powder recovery module and communicating with the suction source, said suction source being operable to draw airborne over sprayed powder coating material out of the booth through the exhaust duct and into the powder recovery module, at least a portion of the exhaust duct being [contained] accessible from within the booth, said portion including a cover section which forms a part of said exhaust duct, said cover section being [removable] movable to allow over sprayed powder coating material to be removed from inside said exhaust duct during a color change operation.

Abstract: A powder spray apparatus is described including a powder booth with a scraper bar which reciprocates across the floor thereof to collect deposited overspray powder and supply it to intakes located at each end wall. The intakes are connected by a feed channel to one or more cyclone separators. An exhaust duct may also be provided for air-borne overspray powder which preferably forms part of the feed channel. Powder recovered from the cyclone separators may be passed to a common collection hopper by use of a venturi pump which transfers the powder from each separator to the hopper via a sieve located in a ventilated enclosure above the hopper.