Method for coating thermionic emission material for a thermionic

Details Method for coating thermionic emission material for a thermionic Method for coating thermionic emission material for a thermionic

1991-10-30

1993-04-20

Bell, Janyce

Coating processes

Electrical product produced

Electron emissive or suppressive

427117, 427120, 427178, 427240, 4273722, 4274346, 4274347, 427435, B05D 512

Patent

active

052041395

ABSTRACT:
Disclosed is a thermionic emission material coating method for a filament used in a fluorescent display tube. The tungsten wire emerges in a carbonate oxide thermionic emission material in dryable form while rotating it so that the carbonate oxide becomes coated on the circumference of the wire and then dries the tungsten wire while rotating it to have a uniform thickness of coating over its entire circumference, thereby preventing flaking off the thermionic emission material and filament breakage which is caused by the uneven coating of thermionic emission material.

REFERENCES:
patent: 4251569 (1981-02-01), Mager et al.
patent: 4411710 (1983-10-01), Mochizuki et al.
patent: 4436762 (1984-03-01), Metz
patent: 4836816 (1989-06-01), Bouchard

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