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Apparatus for spraying a plurality of different powders

  • US 3,873,024 A
  • Filed: 03/12/1973
  • Issued: 03/25/1975
  • Est. Priority Date: 08/13/1971
  • Status: Expired due to Term
First Claim
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1. Apparatus for spraying one or more different powdered materials entrained in air comprising means forming a compartment, a spray orifice connected with the compartment, a plurality of substantially straight passageways with openings to direct a flow of each of the different powdered materials into the compartment, means directing air flow into the compartment and out of the spray orifice to act on the flow of powdered material from each passageway in the compartment, and means for introducing an additional flow of air into the apparatus rearwardly of the compartment to assist in minimizing deleterious feedback of the powder to the unused passageways and to affect its spraying from the spray orifice.

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