Optical-electrical web inspection system

Details Optical-electrical web inspection system Optical-electrical web inspection system

1974-08-09

1976-05-18

Stolwein, Walter

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250572, 250227, 356239, G01N 2132

Patent

active

039581276

ABSTRACT:
An automatically calibrated flying spot web inspection system adapted to detect transverse (or roll mark) defects and discriminate these defects from other defect types. Electronic circuit means responsive to a beam of radiation in either the reflection mode or the transmission mode detect and discriminate these defects from the other types.

REFERENCES:
patent: 3001080 (1961-09-01), Neil
patent: 3061731 (1962-10-01), Thier et al.
patent: 3427462 (1969-02-01), Cist
patent: 3493769 (1970-02-01), Revesz et al.
patent: 3556664 (1971-01-01), Blaisdell et al.
patent: 3646353 (1972-02-01), Bhullar et al.
patent: 3728548 (1973-04-01), Pinior
patent: 3744905 (1973-07-01), Smith
patent: 3843890 (1974-10-01), Anthony, Jr. et al.

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