Method for detecting anomalies in corduroy preparation

Details Method for detecting anomalies in corduroy preparation Method for detecting anomalies in corduroy preparation

1987-07-14

1989-10-03

Mackey, Robert R.

Textiles: cloth finishing

Cutting

Pile loops

D06C 1308

Patent

active

048707279

ABSTRACT:
The apparatus detects corduroy cutter needles coming out of the weft yarn loop channels which are being cut open by the needles, by means of a laser beam scanning about 10 to 20 times a second, transversely across the region where the parallel needles are working. The scanning laser beam creates a diffused light pattern having the general form of a transversely oriented geometric prism, e.g. a cylinder; and a plurality of detector devices determines any variation in the light distribution, as to time and lateral distance, in this scattered or diffused light pattern. A logic circuit carries out and displays the results of the scanning and detecting, and stops the corduroy cutting machine when an emerged needle is detected.

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