Coating processes – Fraud or tamper detecting
Patent
1974-12-12
1976-11-09
Smith, Ronald H.
Coating processes
Fraud or tamper detecting
427212, 427214, 427215, 427220, 427221, 427242, A61K 900, B05D 700
Patent
active
039912256
ABSTRACT:
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.
REFERENCES:
patent: 2340567 (1944-02-01), Sargent
patent: 3092489 (1963-06-01), Smith
patent: 3101040 (1963-08-01), Lanz
patent: 3285223 (1966-11-01), Sahlin
patent: 3342577 (1967-09-01), Blorun et al.
patent: 3390648 (1968-07-01), Martin
patent: 3398191 (1968-08-01), Thompson et al.
patent: 3573966 (1971-04-01), Hostetler
Konopacki Dennis C.
Petrusek Robert A.
Smith Ronald H.
Tennessee Valley Authority
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