Inspection device for high-speed prints

Details Inspection device for high-speed prints Inspection device for high-speed prints

1984-06-20

1987-02-17

McGraw, Vincent P.

Optics: measuring and testing

Motion stopping

Periodically moving reflecting or refracting element

356429, G01P 340, G01N 2186

Patent

active

046435654

ABSTRACT:
An inspection device for detecting faulty prints on a printed matter running at a high speed. The prints on the printed matter are held as if they were stopped on account of the employment of an even-numbered polygonal prism which rotates in synchronism with the running speed of the printed matter and which allows an inspector's eye to catch successively the prints on an optical axis not only at their positions on said optical axis but also at their moving positions before and behind said optical axis.

REFERENCES:
patent: 1974573 (1934-09-01), Leventhal
patent: 2140402 (1938-12-01), Horton
patent: 2155013 (1939-04-01), Horton
patent: 2288079 (1942-06-01), Fitz
patent: 2463016 (1949-03-01), Briskin et al.
patent: 2817995 (1957-12-01), Kirkham
patent: 3451750 (1969-06-01), Wells et al.
patent: 3761178 (1973-09-01), Turner et al.

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