Apparatus for determining irregularities in the mass of a sliver
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United States of America Patent
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Jan 20, 1998
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N/A
app pub date -
Jun 21, 1996
filing date -
Jun 22, 1995
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Expired
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Abstract
The invention relates to a device for determining irregularities in the mass of a sliver, with a measuring chamber (21) for the sliver which has an entrance and an exit and into which a gas stream is introduced via an orifice (25, 26), a relation existing between the gas pressure in the prechamber (20) and the irregularity in mass in the sliver. In order to increase the measuring accuracy, the prechamber (20) is connected to a source of stable pressure for the gas stream via a prenozzle (47). In order to increase the measuring speed, the air volume in the prechamber is kept small. A pressure sensor is connected to the prechamber, measures the pressure fluctuations and converts these into an electrical signal.
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