| 摘要 |
A pick-up unit for withdarwing sample cigarettes from a mass of cigarettes traveling perpendicularly to the cigarette axes; each cigarette occupying random positions within the mass as the latter travels in the aforementioned direction. The unit presents a mobile head for withdrawing at least one cigarette at a time from the aforementioned mass which head presents a suction seat connected to a pneumatic suction circuit and is moved along a given route, between a given release position and a pick-up position located at a random point along the aforementioned route, by reversible actuating elements controlled by a sensor connected to the aforementioned pneumatic circuit and designed to reverse the aforementioned actuating elements in response to a sharp fall in pressure inside the aforementioned pneumatic circuit.
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