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Document Number
US Patent 4228886
Issued Date
October 21, 1980
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Inventors
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Abstract
A glass sheet is advanced into a sheet determining position with one side of the sheet intercepting two scan paths and the other adjacent side of the sheet intercepting one of the two scan paths. Light rays reflected from the portion of the scan paths occupied by the sheet are incident on selected photodetectors which generate a plurality of signals. The signals are acted on to determine orientation of the sheet relative to a reference plane. The information is forwarded to the program of an industrial robot to alter the path of the robot arm to position a pick up frame mounted on the arm over the sheet. Thereafter the frame engages the sheet to load same in a shipping container.
Drawing
Position sensor - US Patent 4228886 Drawing
Drawing from US Patent 4228886
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Number of Claims:
13
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Owner
PPG Industries, Inc. (Pittsburgh, PA)
Published
October 21, 1980
Application Number
05/973,307
Filed
December 26, 1978
US Classification
198/395   198/401 250/559.33 250/559.37 250/559.39 271/227 271/84 356/615 414/730 414/793 901/40 901/47 901/7
Int'l Classification
G01B   11/00   (20060101)  
Examiner
Attorney/Law Firm
USPTO Field of Search
198/395   198/401   198/341   414/71   414/72   414/74   414/70   414/730   271/84   271/241   271/265   271/267   271/227   271/228   250/561   356/375  
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Claims
Description
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