Rca Inc.

Richard A Nolan

Ralph J D'Amato

A color picture tube having a slit type apertured mask, wherein the slit apertures are arranged in columns and the apertures in each column are separated by webs is improved by constructing the mask with portions of full thickness and portions of reduced thickness. The portions of full thickness consist of strips between the aperture columns and islands at the webs. The strips and islands are separated from each other by the portions of reduced thickness. The cross-sectional area of each web is substantially uniform across the web.

Color picture tube having improved slit type shadow mask and method of

The present invention provides an improvement in an apertured mask type color picture tube having a faceplate, a cathodoluminescent screen on the faceplate, a corrugated apertured mask adjacent the screen and an electron gun means for producing and directing a plurality of electron beams through the mask to impinge upon the screen. The mask is constructed by first forming the apertures therein and thereafter forming the mask in a corrugated shape. Aperture width in the apertured but unformed mask is adjusted to compensate for stretching and compression of the mask occurring during formation of the mask into a corrugated shape. Therefore, the corrugated mask is substantially free of aperture width variation from that desired caused by forming the mask in a corrugated shape.

Color picture tube having improved corrugated apertured mask and method

In combination, a CRT (cathode-ray tube) comprising an envelope including a glass faceplate panel and an adjoining glass funnel sealed to said panel, an elastomeric film coating consisting essentially of polyurethane around and adhered to said panel and a continuous metal reinforcing structure around said panel and adhered to said film coating.

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Lancaster, PA, United States of America

Richard A Nolan