Coating apparatus – Projection or spray type – Work-supported and guided carriage
Patent
1976-08-04
1977-08-02
Rimrodt, Louis K.
Coating apparatus
Projection or spray type
Work-supported and guided carriage
B05B 1302
Patent
active
040389421
ABSTRACT:
A system for spraying powder circumferentially around a pipe comprising a yoke engagable with the pipe for more than 180.degree. of the pipe. The yoke has a powder dispenser mounted thereon and means are provided for driving the yoke circumferentially about the pipe. The system also includes a powder suspension device and a blower-suction device providing a stream of air under pressure to the powder suspension device for creating an air-powder suspension therein. The powder dispenser has an inner housing and an outer housing both having openings adjacent the surface of the pipe and arcuately shaped to conform with the curvature of the pipe. The outer housing forms a space around the periphery of the inner housing. A first conduit connects the powder suspension device to the inner housing of the powder dispenser to provide a spray or stream of air-powder suspension to the surface of the pipe. Another conduit connects with the outer housing of the powder dispenser and the suction inlet of the blower-suction device to suck excess powder from the weld joint and return it to the system.
REFERENCES:
patent: 2175392 (1939-10-01), Henry
patent: 2193971 (1940-03-01), Laurent
patent: 3847353 (1974-11-01), Wynne
Commercial Resins Company
Dorman William S.
Rimrodt Louis K.
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