Method and apparatus of monitoring the quality of a false twist

Details Method and apparatus of monitoring the quality of a false twist Method and apparatus of monitoring the quality of a false twist

1992-01-09

1995-08-15

Hail, III, Joseph J.

Textiles: spinning, twisting, and twining

Apparatus and processes

Monitor and record

57 81, 57284, 73828, 340677, D01H 792, D01H 1322

Patent

active

054408709

ABSTRACT:
A method and apparatus for monitoring the quality of the yarn processed on a false twist texturing machine is disclosed, and which includes sensing the tension of the advancing yarn at a location immediately downstream of the false twist unit, and determining the coefficient of variation of the sensed tension. An error signal is generated whenever the coefficient of variation exceeds a predetermined upper limit and whenever the coefficient of variation drops below a predetermined lower limit. Also, an alarm signal is generated whenever the error signal exceeds the predetermined upper limit for a predetermined time, and whenever the error signal drops below the predetermined lower limit for a predetermined time, and the alarm signals are counted so as to provide an indication of the quality of the yarn.

REFERENCES:
patent: 4720702 (1988-01-01), Martens
patent: 5018390 (1991-05-01), Muller

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