Coating processes – Particles – flakes – or granules coated or encapsulated
Patent
1990-10-05
1991-10-29
Beck, Shrive
Coating processes
Particles, flakes, or granules coated or encapsulated
427240, 118 28, 118 29, 118 30, 118 52, 118429, B05D 700
Patent
active
050615203
ABSTRACT:
Particles are enrobed or coated by introducing, to a spinning cup having an outwardly upwardly extending inner surface with an upper edge, a liquid coating material and particles of greater density than the coating material. The coating material and particles are introduced inboard of the peripheral surface, perferably in separate streams. The speed of rotation of the spinning cup is controlled to cause the coating material to climb up the surface but to stop short of the upper edge, and at the same time to cause the particles to travel through the coating material, be enrobed with the coating liquid, climb out of the liquid coating material, and be ejected over the upper edge. The spinning cup is symmetrical about a central vertical axis. It has a peripheral surface sloping outwardly upwardly, which surface can be stepped outwardly upwardly, and a control device is provided for controlling the speed of rotation of the spinning cup.
REFERENCES:
patent: 2955956 (1960-10-01), Baugh et al.
patent: 4298476 (1981-11-01), Dudley
patent: 4318941 (1982-03-01), Gillett et al.
Beck Shrive
K-V Pharmaceutical Company
Owens Terry J.
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