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:
Feb. 24, 1981
Filed:
Aug. 09, 1979
Applicant:
Inventors:
John M Lucas, Montreal, CA;
Serge Gracovetsky, St. Lambert, CA;
Assignee:
Domtar Inc., Montreal, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
356430 ; 250562 ; 356446 ;
Abstract
A blackening sensor analyses a signal generated by the detection of scattered light reflected from a succession of small illuminated areas on the surface of a web to determine the degree of skewness of the amplitude distribution of the generated signal from a normal distribution, thereby to provide an indication of the degree of blackening.