Tension mask having shaped apertures for color cathode-ray...

Details Tension mask having shaped apertures for color cathode-ray... Tension mask having shaped apertures for color cathode-ray...

2005-07-12

2005-07-12

Patel, Vip (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

C313S403000

Reexamination Certificate

active

06917149

ABSTRACT:
A tension mask for a color cathode-ray tube includes a plurality of strips separated by a predetermined distance and connected by real bridges. The strips define slots, through which an electron beam passes, together with the real bridges. The slots are formed such that the width of middle portions of the slots is narrower than the width of upper and lower portions of the slots in order to compensate for contraction of the strips arising when tension is applied to the strips.

REFERENCES:
patent: 3638063 (1972-01-01), Tachikawa et al.
patent: 4942332 (1990-07-01), Adler et al.
patent: 4973283 (1990-11-01), Adler et al.
patent: 6313574 (2001-11-01), Banno et al.

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