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Paint delivery and application apparatus and method

  • US 7,793,858 B2
  • Filed: 01/10/2005
  • Issued: 09/14/2010
  • Est. Priority Date: 10/12/2004
  • Status: Active Grant
First Claim
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1. A paint delivery and application apparatus, comprising:

  • a source of paint under pressure;

    a paint applicator adapted to apply paint to a substrate;

    a supply line interconnecting said source of paint with said paint applicator;

    at least one pigging element in said supply line reversibly moveable back and forth in said supply line between a first pig station adjacent said source of paint and a second pig station adjacent said paint applicator, wherein paint pushes said pigging element from said first pig station to said second pig station, delivering paint from said source of paint to said paint applicator; and

    a source of purging solvent delivering a small volume of purging solvent to said supply line adjacent said first pig station upstream of said pigging element when located in said first pig station sufficient to lubricate said supply line.

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