Fluidized bed top surface stabilization mechanism

Details Fluidized bed top surface stabilization mechanism Fluidized bed top surface stabilization mechanism

1974-05-22

1976-09-07

Lusignan, Michael R.

Coating processes

Solid particles or fibers applied

Fluidized bed utilized

118404, 118DIG5, 427195, B05D 112, B05D 124

Patent

active

039795314

ABSTRACT:
A screen or plate is positioned above and adjacent the normal fluidized pulverulent material top surface level in a typical fluidized bed construction. The screen extends over substantially the entirety of the bed and has enlarged openings therein of a size suitable for the acceptance of the articles that are to be immersed in the pulverulent or powder material. Screen placement within the fluidized bed is also such that upon article immersion into the entrained powder bed, the magnitude of the powder level increase insures that there is at least contact between the screen and bed top surface which will stabilize the bed top surface and preserve the continuity thereof during article immersion and removal. Similarly, an intermittently operable material feeding system is contemplated to assure that a substantially uniform and constant amount of pulverulent material is maintained in the bed during the coating operation.

REFERENCES:
patent: 2549908 (1951-04-01), Johansen
patent: 2719093 (1955-09-01), Voris
patent: 2750681 (1956-06-01), Berry
patent: 2815550 (1957-12-01), Valyi
patent: 2907299 (1959-10-01), Weiner
patent: 2936733 (1960-05-01), Duggins
patent: 2938276 (1960-05-01), Doleman et al.
patent: 2981631 (1961-04-01), Nagel
patent: 2987413 (1961-06-01), Dettling et al.
patent: 3233582 (1966-02-01), Sharetts et al.
patent: 3807355 (1974-04-01), Goldberg

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