Process and device for detecting foreign substances in a textile

Details Process and device for detecting foreign substances in a textile Process and device for detecting foreign substances in a textile

1994-08-30

1996-03-19

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

25055941, 356430, 73160, G01N 2188

Patent

active

054997941

ABSTRACT:
Test material (F) such as a textile yarn is illuminated and the light reflected from the test material is measured so that the presence of a foreign substance can be determined from a change in the reflected light. When detecting foreign substances which are darker than the test material (F), an image of the test material in front of a light background (4) is projected onto a sensor (3), and for the detection of lighter foreign substances an image of the test material in front of a dark background is projected onto the sensor. The apparatus and method may be used in combination with an electronic yarn clearer for the purpose of detecting foreign fibers in yarns.

REFERENCES:
patent: 4184769 (1980-01-01), Aeppli
patent: 4739176 (1988-04-01), Allen et al.
patent: 5054317 (1991-10-01), Laubscher
patent: 5371584 (1994-12-01), Scheinhutte
patent: 5383017 (1995-01-01), Schurch

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