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Lamp with protective coating and method of applying same

  • US 4,279,590 A
  • Filed: 06/23/1976
  • Issued: 07/21/1981
  • Est. Priority Date: 06/23/1976
  • Status: Expired due to Term
First Claim
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1. A lamp having a light-transmitting envelope and an optically clear protective coating on the exterior surface of said envelope, said coating comprising a solvent-free photopolymer in combination with reinforcing fibers dispersed throughout said photopolymer coating, the lengths of said fibers being between about the length of the maximum dimension of said lamp envelope and 1/16 inch, and said photopolymer comprising a UV curable synthetic polymer containing an organic photoinitiator or photosensitizer and which has been rapidly cured by irradiation with a source of ultraviolet light for a period between about 0.1 second and 10 seconds, whereby a smooth coating surface is provided with minimized protrusion of fibers.

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