Method and apparatus for detecting flaws in knitted fabric

Details Method and apparatus for detecting flaws in knitted fabric Method and apparatus for detecting flaws in knitted fabric

1987-04-08

1988-05-31

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250572, 356431, G01N 2188

Patent

active

047483342

ABSTRACT:
A proposal for detecting flaws not defining normal stitches in a knitted fabric. Fabric detection signals are derived from three detectors arranged to correspond to intervals between lines of thread defining stitches. The detection signals are then added with predetermined weights, and the signals thus weighted are subjected to adding and/or subtracting operations. As a result, the flaws not defining normal stitches in the knitted fabric are detected. According to this proposal, reliable detection is made of not only large flaws such as circular holes but narrow flaws such as runs also.

REFERENCES:
patent: 3345836 (1967-10-01), Fertig et al.
patent: 4591726 (1986-05-01), Schenk

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