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US 4,197,152 AGranted
Attaching self-supporting emissive film to cathode support
AssigneeGTE Sylvania Incorporated
InventorsGeorge Palty, Kenneth Speigel
Life of this patent
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AssigneeGTE Sylvania Incorporated
InventorsGeorge Palty, Kenneth Speigel
Estimating the term…
In one aspect of the invention a process for affixing a self-supporting film of emissive materials in a binder to a cathode support member to provide a cathode for a cathode ray tube includes the steps of depositing at least one drop of a liquid mixture containing a solvent for the binder of the film onto a cathode support member, contacting the liquid mixture with the self-supporting film, and preferentially evaporating the liquid mixture to cause the binder of the film to affix the film to the cathode support member. In another aspect of the invention, an improved liquid mixture for affixing a self-supporting film of emissive materials in a binder to a cathode support member includes at least two liquids miscible in all proportions with one liquid essentially a non-solvent and another higher boiling liquid a solvent for the binder of the film.
In a process for fabricating a cathode for a cathode ray tube wherein a drop of solvent mixture is deposited onto a cathode support member, the solvent mixture is contacted by a self-supporting film which includes a binder and the solvent mixture is preferentially evaporated to effect centering of said film on and attachment of said film to the cathode support member, an improved solvent mixture comprising:
Dependencies are inferred from the claim text.