System for spraying fluidized powder circumferentially around a

Details System for spraying fluidized powder circumferentially around a System for spraying fluidized powder circumferentially around a

1980-08-11

1982-01-05

McIntosh, John P.

Coating apparatus

Projection or spray type

Work-supported and guided carriage

118312, 118316, B05C 1900

Patent

active

043088198

ABSTRACT:
A system for spraying fluidized powder circumferentially around a pipe comprising a powder applicator ring engageable with a pipe and having a pair of powder dispensers mounted thereon, a powder fluidization chamber containing a quantity of powder therein, a hose for introducing a stream of air into the chamber to fluidize the powder therein, a powder recovery canister having a pair of axially opposed powder blowers mounted thereon which have their intakes in communication with the interior of the recovery canister, each powder blower having an outlet from which a stream of air is allowed to pass, a pair of tangential inlet pipes circumferentially spaced and connecting with the interior of the canister, a pair of powder control valves connected to the chamber and in communication with the fluidized powder therein, a rod for actuating the powder control valves wherein a quantity of fluidized powder is exhausted into an orifice in each powder control valve, a hose for introducing the fluidized powder from each powder control valve into the sides of each powder blower outlet, a conduit connecting each powder blower outlet with a portion of each powder dispenser for supplying a stream of fluidized powder, a return conduit connecting each tangential inlet pipe to another portion of each dispenser for returning excess powder to the canister, and a fluidization blower mounted on the cylinder from which a stream of fluidizing air is allowed to pass.

REFERENCES:
patent: 3598446 (1971-08-01), Hatcher
patent: 3715838 (1973-02-01), Young et al.
patent: 4005677 (1977-02-01), Hart
patent: 4007705 (1977-02-01), Sherer et al.
patent: 4038942 (1977-08-01), Hart
patent: 4237817 (1980-12-01), Hart et al.

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