Method for detecting an abnormal portion of a yarn package

Details Method for detecting an abnormal portion of a yarn package Method for detecting an abnormal portion of a yarn package

1990-03-29

1992-08-11

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356376, G01N 904

Patent

active

051381516

ABSTRACT:
A ray having an optical axis approximately parallel with a surface of a yarn layer is irradiated against a surface of a package, and a light receiving element for receiving light reflected on an abnormal yarn on the surface of the yarn layer is provided at a position at which the reflected light is maximum to detect an abnormal yarn.

REFERENCES:
patent: 4184769 (1980-01-01), Aeppli
patent: 4184770 (1980-01-01), Pinior
patent: 4606645 (1986-08-01), Matthews et al.
patent: 4748334 (1988-05-01), Kobayashi et al.
patent: 4866289 (1989-09-01), Kawamura et al.

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