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. 04, 1980
Filed:
Mar. 29, 1978
Applicant:
Inventors:
Hobart E Kenton, Lower Burrell, PA (US);
Forrest W Decker, Pittsburgh, PA (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06M / ;
U.S. Cl.
CPC ...
2502 / ; 235 / ;
Abstract
A carriage having (1) an infrared energy ray emitter and detector and (2) an encoder is displaced over a side of stacked glass sheets to sense density of reflected energy rays as a function of carriage position on the stack. The sensed density of reflected infrared energy rays from the edges of the outermost sheets and the interface between adjacent sheets is less than the sensed density of the reflected rays from the sides of the sheets. The output signal of the encoder and of the detector is acted on to determine the number of sheets in the stack.