Method of manufacturing a shadow mask for a color cathode ray tu

Details Method of manufacturing a shadow mask for a color cathode ray tu Method of manufacturing a shadow mask for a color cathode ray tu

1984-04-25

1985-08-20

Skiff, Peter K.

Metal treatment

Compositions

Heat treating

148 121, 148 36, 313402, C21D 804, C22C 3808

Patent

active

045362262

ABSTRACT:
A method of manufacturing a shadow mask includes the steps of perforating a number of apertures in a sheet of iron-nickel alloy, annealing the sheet, and forming the sheet, after annealing, into a shadow mask by pressing while the sheet is kept at a predetermined forming temperature effective to reduce the yield strength of the alloy.

REFERENCES:
patent: 3909311 (1975-09-01), Yamada et al.
patent: 3909928 (1975-10-01), Sato et al.
Flor et al., "Plastic Deformation of Fe-Ni Invar Alloys", Acta Metallurgica, vol. 28, 1980, pp. 1611-1619.
Dieter, Jr., Mechanical Metallurgy, McGraw-Hill Book Co., New York, 1961, pp. 99-101.

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