Shadow mask having ribs bounding rectangular apertures

Details Shadow mask having ribs bounding rectangular apertures Shadow mask having ribs bounding rectangular apertures

1974-03-15

1976-03-16

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313456, H01J 2906, H01J 2907

Patent

active

039448673

ABSTRACT:
A shadow mask for use in a color cathode ray tube to insure that a given electron beam impinges only on a given portion of the cathode ray tube screen. The mask comprises a webbing or sheet of relatively thin, electrically conductive material which defines a mask plane and which has therein a periodic array of electron transmissive apertures. The sheet includes a periodic array of ribs and/or dimples extending out of the plane of the mask to impart substantial rigidity to the mask.

REFERENCES:
patent: 2236041 (1941-03-01), Teal
patent: 2579665 (1951-12-01), Green
patent: 2942133 (1960-06-01), McGee
patent: 3041489 (1962-06-01), Veith
patent: 3229142 (1966-01-01), Kalibjian
patent: 3663854 (1972-05-01), Tsuneta et al.
patent: B395478 (1975-01-01), Orthuber

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