Process and device for detecting structural faults of moving fla

Details Process and device for detecting structural faults of moving fla Process and device for detecting structural faults of moving fla

1996-10-28

2000-10-17

Williams, Hezron

Measuring and testing

Sheet, woven fabric or fiber

7386259, 26 70, G01H 1700

Patent

active

061314528

ABSTRACT:
The device for on-line detection of structural faults in moving flat textile materials includes a spade-like leaf spring contact sensor (2) having a length of from 5 to 20 cm which is advantageously rounded and/or chamfered for engagement with threads in the flat textile materials; a mounting device (5) for mounting the spade-like leaf spring contact sensor (2) so that the contact sensor is at a positioning angle of 10 to 60.degree. relative to the textile material, the contact sensor (2) is oriented perpendicular to a thread direction and a free end of the contact sensor (2) is urged into engagement with the threads in the flat textile material, whereby the contact sensor (2) experiences regular deflections due to the thread pattern and irregular deflections due to structural faults in the thread pattern as the moving textile material moves past the contact sensor (2); and a vibration pickup (4) for measuring the regular and the irregular deflections of the contact sensor to form a sensor motion measurement signal for subsequent analysis and signaling of the structural faults.

REFERENCES:
patent: 2612677 (1952-10-01), Boley
patent: 2834206 (1958-05-01), Mindheim et al.
patent: 3037381 (1962-06-01), Grant et al.
patent: 3164015 (1965-01-01), Schafer
patent: 3357241 (1967-12-01), King, III
patent: 3403447 (1968-10-01), Taylor, Jr.
patent: 4189841 (1980-02-01), Loepfe
patent: 4864853 (1989-09-01), Grunder et al.
Derwent abstract of EPA 0 562 268 A1, AN 93-304726, 1997.

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