| 摘要 |
A stream of cut tobacco having undesired stems and heavy foreign matter is directed to move almost tangentially passed and beneath a drum having an air permeable surface. A source of suction is coupled to suck air through the air permeable surface and into the drum. The movement of air through the surface of the drum causes relatively light particles of tobacco from the stream to move upward and collect on the surface of the drum, the relatively heavy stem and foreign matter falling down into a collecting bin.
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