Fluidized bed with spray nozzle shielding

Details Fluidized bed with spray nozzle shielding Fluidized bed with spray nozzle shielding

1993-08-09

1995-08-01

Bell, Janyce

Coating processes

Solid particles or fibers applied

Fluidized bed utilized

427213, B05D 124

Patent

active

054378893

ABSTRACT:
A shield, such as an upstanding cylindrical partition, is mounted adjacent to an air source, such as an air distribution plate/screen of a Wurster system processor, whereby the open upper end of the partition is generally horizontally registered with and disposed about the upper extremity of an associated spray nozzle. The open lower end of the inner cylindrical partition is generally sealed relative to the air distribution plate/screen and operative to receive air upwardly therethrough for subsequent passing through the inner partition about the spray nozzle. The upper end of the inner tubular partition shields the initial spray pattern discharged from the spray nozzle and prevents the premature entrance of particles moving into the spray nozzle area.

REFERENCES:
patent: 3110626 (1968-11-01), Larson et al.
patent: 3196827 (1965-07-01), Wurster et al.
patent: 4335676 (1982-06-01), Debayeux et al.
patent: 4701353 (1987-10-01), Mutsers et al.
patent: 4858552 (1989-08-01), Glatt
patent: 4960244 (1990-10-01), Maag et al.
Swarbrick & Boylan, Encyclopedia of Pharmaceutical Technology, 1988, pp. 192-195 (no month).

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