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Dual paint coat laser-marking labeling system, method, and product

  • US 6,746,724 B1
  • Filed: 11/01/2000
  • Issued: 06/08/2004
  • Est. Priority Date: 04/11/1997
  • Status: Expired due to Term
First Claim
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1. A method for marking workpieces for identification thereof, which comprises the steps of:

  • (a) providing a laser that emits a beam comprising a select band of radiation;

    (b) coating said workpiece with a coat of a basecoat which is a laser-blackenable paint;

    (c) at least partially curing said basecoat;

    (d) contacting said at least partially-cured basecoat with said laser beam to char said basecoat to form fragile product identification indicia thereon; and

    (e) overcoating said basecoat with a coat of a clear topcoat;

    whereby, said fragile product identification indicia are protected by said clear topcoat while permitting said product identification indicia to be seen.

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