03991225 is referenced by 66 patents and cites 8 patents.

The apparatus provides a homogeneous (with respect to particle size), dense, mass of sized particles in random motion so that highly uniform coatings of the same or of different solids can be applied to each particle by conventional spray-coating with the liquified coating material(s). The apparatus is a horizontal rotary drum containing lifting flights. A novel deflector pan is fixed in space inside the upper section of the drum which deflects particles falling from the lifting flights to the side of the drum where they form a narrow, dense falling cascade. The coating material is sprayed onto the cascading particles, preferably as they free-fall after leaving the lower edge of the pan. However, if desired, some or most of the coating material may be directed onto the top edge of the moving bed including the juncture of the cascade therewith.

Title
Method for applying coatings to solid particles
Application Number
382153
Publication Number
3991225
Application Date
December 12, 1974
Publication Date
November 9, 1976
Inventor
Glenn M Blouin
Florence
AL, US
Agent
Robert A Petrusek
Assignee
Tennessee Valley Authority
AL, US
IPC
B05D 7/00
A61K 9/00
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