Coating processes – Particles – flakes – or granules coated or encapsulated
Patent
1995-07-17
1998-02-24
Lusignan, Michael
Coating processes
Particles, flakes, or granules coated or encapsulated
427215, 427242, 427421, 118 20, 118303, 118 50, 118 64, 118418, B05D 702, B05D 102, B05B 1700
Patent
active
057210128
ABSTRACT:
An apparatus is provided for continuously coating particulate material, such as seeds. The apparatus includes a frame, a cylindrical drum rotatable about an axis tilted with respect to a horizontal plane, and a series of spray nozzles extending into the drum so as to spray one or more coating solutions onto the particulate material which tumbles within the rotating drum. The drum includes a rifling with flighting which carries the material upwardly from approximately 6 o'clock position to a 9 o'clock position, wherein the material falls from the flighting in a curtain spaced apart from the sidewall of the drum. Perforations in the sidewall of the drum allow a flow of air through the drum and curtain of material so as to dry the coating solution on the material substantially instantaneously as the material is coated with solution in the drum. The drum is maintained at a negative pressure during the coating process. In an alternative embodiment, a second drum is provided in series with the first drum, with a conduit interconnecting the drums such that material can be coated in the first drum and then conveyed to the second drum for additional coating.
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Barber Donald E.
Long, Jr. Richard L.
Chen Bret
Coating Machinery Systems, Inc.
Lusignan Michael
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