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ELECTROSTATIC POWDER COATING APPARATUS

  • US 3,667,675 A
  • Filed: 02/16/1971
  • Issued: 06/06/1972
  • Est. Priority Date: 02/16/1971
  • Status: Expired due to Term
First Claim
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1. An electrostatic powder coating apparatus for electrostatically coating the surfaces of articles with pulverulent materials comprising:

  • a gun body having a longitudinal passage therethrough, said longitudinal passage having an inlet for receiving pulverulent materials and a discharge for discharging said pulverulent materials from the gun body toward an article to be coated;

    an elongated ionization member having a first end disposed within said longitudinal passage and a second end spaced forward from the discharge of said gun, said ionization member further including a probe extending from said first end to said second end of said ionization member, said probe being constructed of an electrically conductive material, a body member constructed of an electrically non-conductive material surrounding said probe and extending from said first end to a point along said probe such that substantially all of said probe disposed within said passage is surrounded by said body member, a deflecting member for deflecting pulverulent materials being discharged from said discharge, said deflecting member being constructed of an electrically non-conductive material and disposed near said second end such that said deflecting member is spaced from said body member so that a portion of the probe immediately to the rear of said deflecting member is exposed to pulverulent materials passing through said passage and such that a portion of said probe passes through said deflecting member and extends past an exterior surface of said deflecting member; and

    means for connecting a high voltage energy source with said probe so as to maintain a high voltage difference between said probe and the article to be coated.

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