A paint delivery and application apparatus, wherein the apparatus includes a source of paint, a paint applicator, a supply line interconnecting the source of paint and the applicator and at least one pig in the supply line, wherein the paint pushes the pig from adjacent the source of paint to the paint applicator and a source of purging solvent delivering a small volume of purging solvent to the supply line when the pig is adjacent the source of paint adjacent to and upstream of the pig acting as a lubricant, reducing chattering and skipping of the pig and extending the life of the pig. Where the apparatus includes two pigs, purging solvent is delivered between the pigs adjacent the applicator, the pigs are delivered to adjacent the source of paint and a small volume of solvent is then delivered from between the pigs upstream of the pigs.

Claims

9 · 1 independent · depth 3

9 granted claims

›1.independentA method of applying an electrically conductive paint to a substrate located in a paint spray booth with an electrically charged paint applicator deli…+8

›2.↳ 1The method set forth in claim 1, further including the step of returning said paint left in said second paint delivery line to said paint canister the…d2

›3.↳ 1The method set forth in claim 1, wherein said step of electrically isolating said color changer from said paint applicator by filling said first paint…d2+1

›4.↳ 1The method set forth in claim 1, further including the step of electrically isolating said paint canister from said charged paint applicator.d2

›6.↳ 1The method set forth in claim 1, wherein said step of delivering a small amount of purge solvent upstream of said pig is further defined by the solven…d2

›7.↳ 1The method set forth in claim 1, further defined by providing a second pig disposed in said first paint delivery line, said second pig being transport…d2+2

Classifications

8 codes

IPC · International Patent Classification

Section B — Performing operations; transporting

B65B1/04

USPC · US Patent Classification

141/9239/123239/116239/320239/690141/89239/3

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Pendency

3.9 y

1,439 days filing → grant

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non-final + final

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no RCE

Examiner

Jason K Niesz

art unit 3751 · TC 3700

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1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20120037716 A1	16 Feb 2012

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