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:
Sep. 30, 1997
Filed:
Apr. 17, 1996
Applicant:
Inventors:
Zhongtai Chen, West Bloomfield, MI (US);
Ronald G Shell, Bloomfield Hills, MI (US);
Randy C Keller, Canton, MI (US);
J Michael Spall, Plymouth, MI (US);
Assignee:
Unisys Corporation, Blue Bell, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B65H / ;
U.S. Cl.
CPC ...
271260 ; 209591 ;
Abstract
An apparatus for differentiating and separating multiple overlapped like documents from single like items, transported along a track comprising a suction device applying opposed vacuum forces to separate the documents at a separation station. Measuring and analyzing the resulting pressure differentials within the suction system by a pressure sensor to indicate whether single or multiple documents are passing.