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US 4,383,164 AGranted
Method of manufacturing a control grid for fluorescent display tube
AssigneeFutaba Denshi Kogyo K.K.
InventorGoro Eto
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Abstract
A method of manufacturing a control grid used in a fluorescent display tube is disclosed. The grid is produced by preparing a fine wire net, placing the wire net upon a metal frame member, and irradiating laser beams to the contact portions of the wire net and frame to weld the wire net and the frame.
Claims7
A method of manufacturing a control grid for a fluorescent display tube which effects luminous display of numerals or symbols by accelerating and controlling electrons emitted from a filamentous cathode and selectively impinging the electrons upon anodes on which phosphor layers are deposited comprising the steps of:
- preparing a net made of fine metal wire woven in a latticework pattern, said metal wires having diameters lying in the range of 20 to 60 .mu.m;
- preparing a thin metal frame member;
- mounting the wire net upon the metal frame member;
- placing a light transmitting holding plate upon the wire net for pressing and putting the wire net upon the metal frame member;
- and
- irradiating laser beams to contract portions of the wire net and the metal frame member through the holding plate, thereby to weld the wire net to the metal frame member.
3 more elements
Dependencies are inferred from the claim text.