Combined mask-frame with double spot welds

Details Combined mask-frame with double spot welds Combined mask-frame with double spot welds

1992-02-20

1993-06-08

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313408, H01J 2907

Patent

active

052182657

ABSTRACT:
In a combined mask/frame for a colour picture tube, a mask is attached to a frame by means of spot welds which are positioned at the corners and adjacent to the long center axis and the short center axis. Of central importance is the fact that all spot welds are arranged as double spot welds instead of single spot welds which were usual until now. The single spot welds of each double spot weld are located basically at the same height of the mask skirt but are slightly separated from each other.

REFERENCES:
patent: 3553516 (1970-01-01), Kautz
patent: 3772555 (1973-11-01), McKee et al.
patent: 3808493 (1974-04-01), Kawamura et al.
patent: 4099086 (1978-07-01), Roder et al.
patent: 4806820 (1989-02-01), Berner et al.
patent: 4950945 (1990-08-01), Fendley et al.
JP 60 63856 A: Patent Abstracts of Japan, E-335, Aug. 14, 1985, vol. 9, No. 197.
JP 61 18836 A: Patent Abstracts of Japan, E-471, Jan. 17, 1987, vol. 11, No. 17.
JP 62 223948 A: Patent Abstracts of Japan, E-592, Mar. 23, 1988, vol. 12, No. 89.

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