Method of coating a lamp with a U.V. curable resin with fibers therein
AssigneeGTE Products Corporation
InventorsJudith A. Dow, Timothy Fohl
Life of this patent
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Abstract
A photoflash lamp having a glass envelope with a clear protective exterior coating comprising a photopolymer reinforced with glass fibers. In applying the coating, a long strand of glass fibers is wrapped about the lamp envelope, which is then dipped in a liquid photopolymer, or short lengths of glass fiber are dispersed throughout the liquid photopolymer, either by premixing or application after dipping. The wet-coated lamp is then cure-hardened by a short period of irradiation with a source of ultraviolet light.
Claims4
A method of applying a protective light-transmitting coating on the exterior surface of a lamp envelope, said method comprising:
- mixing lengths of fiber into a liquid photopolymer, said lengths of fiber being between about the length of the maximum dimension of said envelope and 1/16 inch,
- dipping said envelope into the mixture of fibers and liquid photopolymer, and
- irradiating the coated envelope with a source of ultraviolet light for a period of between about 0.1 second and 10 seconds so as to cure-harden the fiber-reinforced photopolymer coated on said lamp, whereby a smooth coating surface is provided with minimized protrusion of fibers.
A method of applying a protective light-transmitting coating on the exterior surface of a lamp envelope, said method comprising:
- dipping said envelope into a liquid photopolymer,
- applying lengths of fiber onto the wet photopolymer coating on said envelope, said lengths of fiber being between about the length of the maximum dimension of said envelope and 1/16 inch and,
- irradiating the coated envelope with a source of ultraviolet light for a period of between about 0.1 second and 10 seconds so as to cure-harden the fiber-reinforced photopolymer coated on said lamp, whereby a smooth coating surface is provided with minimized protrusion of fibers.
Dependencies are inferred from the claim text.