Method of assembling a mask-panel assembly of a shadow-mask cathode-ray tube
AssigneeRCA Corporation
InventorsJawdat Ibrahim Nubani, Walter Robert Rysz
Life of this patent
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Abstract
Prior to mounting the mask in its prescribed position spaced from the inner surface of the panel, the panel surface is coated with a film of an organic material to improve the resistance of that surface to abrasion and bruising. The film is volatilizable when heated in air at temperatures up to about 400.degree. C so that it is easily removable by baking.
Claims10
In a method for assembling a mask-panel assembly for a shadow-mask cathode-ray tube, the steps in the following order:
- a. precoating the inner surface of the panel of said assembly with a film of organic material, which film is volatilizable when heated in air at temperatures up to about 400.degree. C,
- b. mounting the mask of said assembly in said panel at a predetermined spaced position relative to said inner surface,
- c. and then baking said panel in air at temperatures sufficient to volatilize said film.
In a method for manufacturing a cathode-ray tube comprising a faceplate panel including a viewing window having an inner surface, a luminescent viewing screen on said surface and a mask mounted in said panel at a predetermined position spaced from said inner surface, the steps in the following order:
- a. precoating said inner surface of said panel with a film of organic material, which film is volatilizable when heated in air at temperatures up to about 400.degree. C,
- b. mounting said mask in said panel,
- c. baking said panel in air at temperatures sufficient to volatilize said film
- d. and then depositing said viewing screen on the inner surface of said viewing window.
Dependencies are inferred from the claim text.