Color CRT shadow mask with wrinkle-free corners

Details Color CRT shadow mask with wrinkle-free corners Color CRT shadow mask with wrinkle-free corners

1985-10-03

1989-08-22

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313407, H01J 2906

Patent

active

048599018

ABSTRACT:
A deep-drawn rectangular shadow mask having a blind edge between the aperture area and the upright skirt. In each corner of the blind edge, weakened portions are formed extending parallel to the diagonal of the mask, to compensate for the buckle load occurring during bilateral drawing of the mask. The weakened portions are formed by rows of elongated pits parallel to the corner diagonal, or blind slots parallel to the diagonal.

REFERENCES:
patent: 3737703 (1973-06-01), Tsuneta et al.
patent: 3809945 (1974-05-01), Roeder
patent: 3862448 (1975-01-01), Ishizuka et al.
patent: 4191909 (1980-03-01), Dougherty

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