Apparatus and method for detecting defects in a moving web

Details Apparatus and method for detecting defects in a moving web Apparatus and method for detecting defects in a moving web

1985-04-24

1988-03-01

LaRoche, Eugene R.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356238, 356430, G01N 2188

Patent

active

047288000

ABSTRACT:
Apparatus and method for monitoring a moving web for structural defects at a plurality of independent locations across the width of the web, determining the location and magnitude of a detected defect and controlling movement of the web responsive thereto. A plurality of light sensing elements may be employed operatively connected to a microprocessor. A separate edge sensor may be employed and is claimed.

REFERENCES:
patent: 3589816 (1971-06-01), Sugaya
patent: 3694658 (1972-09-01), Watson et al.

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