Method for inspecting, detecting and distinguishing sides of fab

Details Method for inspecting, detecting and distinguishing sides of fab Method for inspecting, detecting and distinguishing sides of fab

1988-02-09

1989-09-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356429, G01N 2186, G01V 904

Patent

active

048641502

ABSTRACT:
A method for inspecting, detecting and distinguishing sides of fabrics by reflecting light off the fabric and measuring the intensities relatively or absolutely, of such reflected light and comparing such measurements with pre-determined calibrations or other appropriate standards of comparison, so that the fabric can be properly oriented for sewing like sides to like sides, relying on different light reflecting characteristics of the two sides of the fabric.

REFERENCES:
patent: 3474254 (1969-10-01), Piepenbrink et al.
patent: 4306151 (1981-12-01), Chase
patent: 4750140 (1988-06-01), Asano et al.

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