Particle feeding device and method for pyrolytic carbon coaters

Details Particle feeding device and method for pyrolytic carbon coaters Particle feeding device and method for pyrolytic carbon coaters

1992-01-14

1994-07-26

Mitchell, David M.

Conveyors: fluid current

With means to control conveying fluid or movement of load in...

Control of conveying fluid

406 50, 406146, B65G 5366

Patent

active

053323378

ABSTRACT:
A particle feeding device and method for fluidized bed coaters that has no moving parts. It preferably provides for constant flow of purge gas into the fluidized bed coater and has a feedback control means for monitoring and precisely controlling the flow of particles into the coater. The particle feeding device includes a supply of granular material in communication with a generally horizontal passageway and a delivery conduit for feeding granular material into a desired location, such as a fluidized bed coater. The amount of granular material remaining in the supply is periodically determined and pulses of gas are periodically discharged through said generally horizontal passageway so as to blow granular material into said delivery conduit in a manner so as to feed the precise amount of granular material for predetermined periods of time.

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