| 摘要 |
Known apparatuses comprise a feed passage (4), a nozzle passage (5) extending therefrom in the feed direction (T), and a flow generator for generating a feed gas flow in the feed passage. The outlet portion of the nozzle passage (5) has provided therein a lateral opening (13) which permits the outflow of the gas stream. To be able to carry out pressure measurements in a measuring funnel with a known apparatus as well, the apparatus comprises a control (40) through which the lateral openings (13) can be closed. After the opening has been closed, pressure which can be measured with the aid of a pressure sensor (42) builds up in the tapered nozzle passage. The pressure measured corresponds to the thickness of the fiber sliver and can be used for controlling an upstream card. The apparatus is employed during the feed of card slivers.
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