Particle coating apparatus

Details Particle coating apparatus Particle coating apparatus

B - Operations, Transporting

05

B

32/59

B05B 17/00 (2006.01) B01J 2/00 (2006.01)

Patent

CA 1049775

PARTICLE COATING APPARATUS Abstract An apparatus for coating tablets and other particles with liquid coating materials while such particles are suspended and circulated in an air-fluidized bed. The apparatus includes an upstanding casing with a cylindrical upper section and a tapered lowered section. A plenum chamber is provided about the tapered lowered section for directing pressurized air into an inlet at the bottom of the casing. The inlet is completely open and unobstructed so that when the flow of pressurized air is discontinued particles within the casing will fall downwardly through the inlet into the plenum to be emptied therefrom. A spray nozzle is mounted in the plenum in coaxial alignment with the inlet for spraying liquid upwardly into the casing to coat the suspended particles circulating therein. Means are disclosed for promoting smooth and efficient air flow, for permitting interchange of nozzles without discontinuing the suspension and circulation of particles, and for viewing and thereby controlling the coating operation as it is being performed.

219970

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