Color picture tube having improved slit type shadow mask and met

Details Color picture tube having improved slit type shadow mask and met Color picture tube having improved slit type shadow mask and met

1979-12-18

1981-11-10

Krawczewicz, Stanley T.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313408, H01J 2980

Patent

active

043000690

ABSTRACT:
A color picture tube having a slit type apertured mask, wherein the slit apertures are arranged in columns and the apertures in each column are separated by webs is improved by constructing the mask with portions of full thickness and portions of reduced thickness. The portions of full thickness consist of strips between the aperture columns and islands at the webs. The strips and islands are separated from each other by the portions of reduced thickness. The cross-sectional area of each web is substantially uniform across the web.

REFERENCES:
patent: 3882347 (1975-05-01), Suzuki et al.
patent: 3883770 (1975-05-01), Yamada et al.
patent: 3916243 (1975-10-01), Brown
patent: 3944867 (1976-03-01), Kaplan
patent: 3973965 (1976-08-01), Suziki et al.
patent: 4131822 (1978-12-01), Branton
patent: 4168450 (1979-09-01), Yamauchi et al.

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