Shadow mask having aperture occlusion prevention means

Details Shadow mask having aperture occlusion prevention means Shadow mask having aperture occlusion prevention means

1985-08-22

1987-11-10

Corbin, John K.

350 11, 354 1, G02B 2700, G03B 4100

Patent

active

047053577

ABSTRACT:
A component-in-process for use in the manufacture of a color cathode ray tube comprises a shadow mask having a pattern of minute apertures for color selection the mask according to the invention has disposed on at least one side thereof a removable film effective to prevent particle occlusion of the apertures. The film according to the invention has an extremely small, substantially uniform thickness dimension, a low index of refraction, and is of such high transparency as to exhibit a negligible optical effect during photoscreening operations. An associated manufacturing method for a cathode ray tube is also disclosed.

REFERENCES:
patent: 3676914 (1972-07-01), Fiore
patent: 3848983 (1974-11-01), Fridrich
patent: 3888777 (1976-10-01), Hosokoshi et al.
patent: 3935036 (1976-01-01), Kinsch
patent: 3954470 (1976-05-01), Barczynski et al.
patent: 4045224 (1977-08-01), Yamazaki et al.
patent: 4378953 (1983-04-01), Winn

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