Method and apparatus for making flat tension mask color cathode

Electric lamp or space discharge component or device manufacturi – Process – With testing or adjusting

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445 30, 445 52, 445 68, H01J 920

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active

050591479

ABSTRACT:
Process and apparatus are disclosed for use in the manufacture of a color cathode ray tube having a shadow mask with a central pattern of apertures mounted in tension on a transparent flat front panel. The mask aperture pattern is registered with a cathodoluminescent screen pattern of corresponding geometry and position on an inner surface of the panel. The shadow masks and front panels are respectively interchangeable. In a preferred arrangement, signals are developed which are indicative of the positions of a mechanically stretched mask aperture pattern and an associated front panel screen pattern relative to a reference or to each other. Responsive to such signals, there is effected a relative positioning of the mask and screen until registration between the patterns is achieved.

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"Improvements in the RCA Three-Beam Shadow-Mask Color Kinescope" by Grimes et al., pp. 315-326.

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