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:
Nov. 03, 1981
Filed:
Oct. 22, 1979
Applicant:
Inventors:
Forrest W Decker, Pittsburgh, PA (US);
Jacob R Peternel, Pittsburgh, PA (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06M / ;
U.S. Cl.
CPC ...
235 / ; 235 / ;
Abstract
Reflected energy density signal as a function of distance in pulse counts determined from a side of stacked sheets is used to calculate sheet pulse counts. A working pulse range is determined from the nominal thickness range of the stacked sheets and thereafter pulse values within the working pulse range are selected. The calculated sheet pulse counts and selected pulse values are compared and acted on to develop a pair of sheet counts for each selected pulse value. The pair of sheet counts occurring at least 10 consecutive times is considered the number of sheets in the stack.