Method of manufacturing a crt using a flowcoating process
OwnerDonald Bartch, Alan Andrew Halecky +2inventors
InventorsDonald Bartch, Alan Andrew Halecky, John Farrah, James Edwards
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Abstract
The invention incorporates a method of manufacturing a CRT that comprises the application of an internal conductive coating formulation by a flowcoating process on a portion of an interior surface of a funnel and on an interior portion of a neck of the CRT. The formulation comprises iron oxide, graphite, a silicate, a copolymer, surfactant and water. In a preferred embodiment, the copolymer is a maleic copolymer.
Claims10
A method of manufacturing a CRT comprising the steps of:
- providing an envelope with an interior surface and an exterior surface, said envelope including a faceplate having a luminescent screen on said interior surface thereof, a neck for supporting an electron gun, a funnel connecting said neck and said faceplate;
- flowcoating a flowcoating formulation on a portion of said interior surface of said funnel and on an interior portion of said neck, said flowcoating formulation comprises metal oxide, graphite, a silicate, a copolymer, surfactant and water;
- drying said flowcoating formulation on said portion of said interior surface of said funnel and on said interior portion of said neck, thereby forming a conductive coating;
- and
- sealing a mount containing said electron gun to said neck, said electron gun having an anode in electrical contact with said conductive coating.
A formulation for flowcoating comprising metal oxide, graphite, a silicate, a copolymer, surfactant and water.
Dependencies are inferred from the claim text.