Coating machine with a rotatably driven perforated drum
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United States of America Patent
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-
Aug 24, 1993
Grant Date -
N/A
app pub date -
Nov 14, 1991
filing date -
Nov 17, 1990
priority date (Note) -
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Abstract
A coating machine with counter-flow and parallel-flow air conduction is used for coating tablets, granules, pellets, dragees and the like with one or more coating compositions. The cores to be coated are arranged in a rotatably driven, perforated drum which includes an air conducting channel surrounding the drum at its outer periphery, which air channel is provided with air from an air supply fixed to the housing, with air streams differently directed into the drum. In order to provide an operationally reliable, positively controlled and easy-to-clean air distributor, an annular distributor plate is mounted rotatably on an annular flange fixed to the housing, the distributor plate having slots therein which are connected to the air connections of the air supply, and the annular flange is in turn connected in an airtight manner to the air conducting channel of the drum by part-annular chambers separate from each other.
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