Apparatus for determining irregularities in the mass of a sliver

Details Apparatus for determining irregularities in the mass of a sliver Apparatus for determining irregularities in the mass of a sliver

1996-06-21

1998-01-20

Calvert, John J.

Textiles: fiber preparation

Assembling

Formed silvers

19239, 73160, D04H 1100, D06H 308

Patent

active

057090114

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.

REFERENCES:
patent: 4100791 (1978-07-01), Miller et al.
patent: 4184361 (1980-01-01), Erban
patent: 4306450 (1981-12-01), Moser
patent: 4318299 (1982-03-01), Morf
patent: 4829758 (1989-05-01), Gilhaus
patent: 4947947 (1990-08-01), White
patent: 5501100 (1996-03-01), Baechler et al.
patent: 5537868 (1996-07-01), Shofner et al.

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