Method for making CRT shadow masks

Details Method for making CRT shadow masks Method for making CRT shadow masks

1985-01-31

1985-09-10

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

29424, H01J 914, H01J 3120

Patent

active

045403740

ABSTRACT:
A method of making a mask structure including two or more masks for a color cathode ray tube, for example a mask-focusing color cathode ray tube, and the mask structure formed by the method. A plurality of apertured flat masks, each mask having an effective portion having apertures and non-effective portion surrounding the effective portion, are aligned and stacked with a predetermined gap. The gap is then filled with filling material, which solidifies thereby fixing the flat masks together. The fixed masks are simultaneously pressed into a predetermined curved shape. The filling material is then removed from the curved masks.

REFERENCES:
patent: 2971117 (1961-02-01), Law
patent: 3046202 (1962-07-01), Horner et al.
patent: 3663997 (1972-05-01), Kuznetzoff
patent: 4107569 (1978-08-01), Ronde
patent: 4112563 (1978-09-01), van Esdonk
patent: 4207656 (1980-06-01), van Esdonk et al.
patent: 4392914 (1983-07-01), Takenaka et al.

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