The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 07, 1980
Filed:
Jun. 29, 1978
Applicant:
Inventor:
Walter P Van Beeck, Sinaai, BE;
Assignee:
AGFA-GEVAERT N.V., Mortsel, BE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
356430 ; 250572 ;
Abstract
Device and method for the optical inspection of speck-like and streaklike defects in a moving web. A source of radiation illuminates a transverse zone of the web, a series of photocells measures the radiation after transmission through, or reflection from the web, and a grating arrangement modulates the radiation received by the photocells, thereby to modulate the output signal of each cell by an A.C. component.