Tension mask securement means and process therefor

Details Tension mask securement means and process therefor Tension mask securement means and process therefor

1989-04-14

1990-08-21

Wieder, Kenneth

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313402, H01J 2907

Patent

active

049509454

ABSTRACT:
A front assembly for a color cathode ray tube is disclosed. The tube includes a faceplate having on its inner surface a centrally disposed phosphor screen embraced by a peripheral sealing area adapted to mate with a funnel. A faceplate-mounted frame-like shadow mask support structure secured to the inner surface of the faceplate between the sealing area and the screen has a mask-receiving surface for receiving and supporting a foil shadow mask and holding the mask in tension by laser weldments. The weldments according to the invention are spaced close enough to hold the mask in tension without distortion, yet spaced widely enough to provide for relatively rapid welding and strong, independent welds.

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Publication of American Society for Metals, Metals Park, Ohio 44073, entitled, "Metals Handbook Ninth Edition", Oct. 5, 1983, Special Welding Processes.
Welding Engineer, pp. 42-44, dated Aug., 1970, entitled "CO.sub.2 Laser Welding Joins the Parade".

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