System for detecting small holes in moving articles

Details System for detecting small holes in moving articles System for detecting small holes in moving articles

1999-08-25

2000-08-15

Allen, Stephone B.

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

25055945, 356430, G01B 1104, G01N 2100

Patent

active

061040371

ABSTRACT:
A small hole detection system which detects small holes in fast moving sheets of material. An array of LEDs is pulsed from an emitter which is aligned with an array of photocells positioned to detect light emitting from the emitter. The receiver sends a signal to a processing unit when light is detected. The small hole detection system may include an auto-shuttering mechanism which automatically adjusts the system according to the width of the material being scanned.

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patent: 3859538 (1975-01-01), Mannonen
patent: 4559451 (1985-12-01), Curl
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patent: 5546808 (1996-08-01), Harris
patent: 5798531 (1998-08-01), Harris
patent: 5969373 (1999-10-01), Harris

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