Shadow mask, and method of manufacturing the same

Details Shadow mask, and method of manufacturing the same Shadow mask, and method of manufacturing the same

1988-12-08

1989-07-11

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

Electrode making

72347, 313402, H01J 900, H01J 2907

Patent

active

048467472

ABSTRACT:
An ingot of an Invar alloy is rolled in one direction into a plate, a number of slot holes are formed in this plate, and the plate is pressed into a curved form, thus providing a shadow mask of a color CRT. The slot holes of this shadow mask have longitudinal axes extending substantially at right angles to the rolling direction of the plate. The holes maintain their shapes after the plate has been pressed.

REFERENCES:
patent: 4072876 (1978-02-01), Morrell
patent: 4427396 (1984-01-01), van den Berg
patent: 4528246 (1985-07-01), Higashinakagawa

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