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:
Jul. 30, 1991
Filed:
Feb. 05, 1990
Applicant:
Inventors:
William R Lile, Medford, NJ (US);
Russell M Lange, Philadelphia, PA (US);
Assignee:
Opex Corporation, Moorestown, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
2502 / ; 250559 ; 53396 ; 53503 ;
Abstract
A candling system for a mail extraction device incorporates a light source in the form of a light emitting diode and a cooperating photo-transistor detector which operate in the infrared range, to increase the system's immunity to environmental variations, and a linearization circuit for increasing the differentials in voltage which are developed between adjacent density levels (relative to the number of sheets involved), to permit the system to better monitor (distinguish between) envelopes containing an increased number of documents with improved accuracy and efficiency.