Shadow mask of braun tube for color TV and process for manufactu

Details Shadow mask of braun tube for color TV and process for manufactu Shadow mask of braun tube for color TV and process for manufactu

1979-11-09

1981-12-15

Krawczewicz, Stanley T.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

291635R, 29557, 29 2518, 156644, 252502, H01J 2980

Patent

active

043061729

ABSTRACT:
A shadow mask of a Braun tube for a color TV made of a steel alloy having the following compositions in weight percent: C.ltoreq.0.12, 0.2.ltoreq.Mn.ltoreq.1.5, 0.3.ltoreq.Si.ltoreq.1.5, 1.0.ltoreq.2Si+Mn, 0.005.ltoreq.Al.ltoreq.0.030, and the balance being Fe and unavoidable impurities. A cold rolled and annealed strip made from such a steel alloy has a Vickers hardness of at least 110 so that it can be easily and satisfactorily processed in the subsequent hole-formation step.

REFERENCES:
patent: 3654505 (1972-04-01), Davis et al.
patent: 3909928 (1978-10-01), Sato et al.
patent: 4210843 (1980-07-01), Avadani

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