Electrostatic coating of substrates of medicinal products
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United States of America Patent
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Nov 28, 1995
Grant Date -
N/A
app pub date -
Oct 19, 1992
filing date -
Feb 22, 1991
priority date (Note) -
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Abstract
Method of coating cores of pharmaceutical tablets with a dry powder, wherein the cores are fed onto a conveyor, the dry powder is supplied to a region through which the cores are to be conveyed, and the cores are conveyed on the conveyor through the region with the cores maintained at a different electric potential from the dry powder. In this way, the dry powder is attracted to the exposed surfaces of the cores to form powder coatings thereon. The dry powder on the surface of the cores is then melted to convert the powder into fused film coatings secured to the cores.
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