| 摘要 |
A cigarette making machine includes a chimney (12, 14) and means (10) for projecting tobacco in a direction transverse to the chimney, from which direction lighter particles of tobacco tend to be deflected upwards into the chimney by an upwardly flowing air stream while heavier particles continue past the lower end of the chimney directly towards a projector roller (26) which is arranged to project the heavier particles downwards at a controlled velocity and in a controlled direction (inclined to the vertical) into a duct (30) through which at least part of the air entering the chimney flows upwards. Lighter particles of tobacco which are entrained with the heavier particles tend to be carried upwards, into the chimney, by the air flowing up the duct, while the heavier particles drop to the bottom of the duct and are removed.
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