Photographic master for use in making a color cathode ray tube s

Details Photographic master for use in making a color cathode ray tube s Photographic master for use in making a color cathode ray tube s

1975-12-15

1976-10-05

Lazarus, Richard B.

Metal working

Barrier layer or semiconductor device making

Barrier layer device making

29 2518, H01J 914

Patent

active

039836134

ABSTRACT:
This disclosure depicts a novel low cost, high performance color cathode ray tube of the shadow mask type, and methods and apparatus for manufacturing the tube. The tube has a novel envelope, on a faceplate portion of which is corner-suspended a lightweight, non-self-rigid shadow mask. The tube has a variety of features and is especially adapted to be made by manufacturing methods which permit the screened faceplates to be interchanged, each with all others, and the shadow masks to be interchanged, each with all others, with consequent economies in manufacture and enhanced tube performance. This disclosure stresses the structure of a transparent master having a stencil covering portions of the convex face, which master is employed in the making of the mask.

REFERENCES:
patent: 3494267 (1970-02-01), Schwartz
patent: 3537161 (1970-11-01), Kautz
patent: 3676914 (1972-07-01), Fiore
patent: 3768385 (1973-10-01), Noguchi

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