Apparatus for coating incandescent lamp bulbs

Details Apparatus for coating incandescent lamp bulbs Apparatus for coating incandescent lamp bulbs

1974-10-23

1976-06-08

McIntosh, John P.

Coating apparatus

With vacuum or fluid pressure chamber

118312, 118317, 118DIG5, B05C 702, B05C 1110

Patent

active

039616002

ABSTRACT:
The powder used in applying a light diffusing coating to the inner wall of an incandescent lamp bulb is deposited substantially free of clumps by, amongst other things, maintaining the powder in suspension in a closed container prior to deposition. The powder in said container is also maintained at a constant level. The powder is carried from the container to the lamp bulbs by a stream of air and is passed through a vortex nozzle which breaks up clumps or agglomerates of powder.

REFERENCES:
patent: 3233582 (1966-02-01), Sharetts et al.
patent: 3335024 (1967-08-01), Lopenski et al.
patent: 3453134 (1969-07-01), Haw
patent: 3554164 (1971-01-01), West
patent: 3607553 (1971-09-01), Fritzsche

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