Apparatus for ascertaining selected characteristics of sheets

Details Apparatus for ascertaining selected characteristics of sheets Apparatus for ascertaining selected characteristics of sheets

1996-03-12

1997-04-29

Raevis, Robert

Measuring and testing

G01N 2186

Patent

active

056238509

ABSTRACT:
Apparatus for ascertaining the width, the length, the coarseness of cut edges and/or other selected characteristics of sheets of paper or the like has a sheet testing unit employing one or more cameras for the monitoring of a sheet which is maintained in a predetermined position at a predetermined location, a feeding unit which supplies sheets to be tested from a source of sheets to the predetermined location, and an evacuating unit which withdraws freshly tested sheets from the predetermined location. Signals denoting the results of tests can be used to regulate the operation of the machine or production line which makes and/or processes the sheets, and the evacuated satisfactory tested sheets can be returned into such machine or production line.

REFERENCES:
patent: 5214490 (1993-05-01), Abe et al.
patent: 5410157 (1995-04-01), Davis
Patents Abstracts of Japan-Paper Thickness Detector--P-750 Aug. 29, 1988, vol. 12/No. 317.
Patents Abstracts of Japan-Inspecting Device of Surface State--P-297 Aug. 29, 1984, vol. 8/No. 188.

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