G - Physics – 01 – N
Patent
G - Physics
01
N
340/123.4
G01N 21/27 (2006.01) G01N 21/892 (2006.01)
Patent
CA 1124358
Abstract Identification of subtle streaklike defects in running webs and sheets by transversely scanning distinct lateral sections of the webs or sheets by means of lines of radiant energy that run parallel with the direction of movement of the webs or sheets. transmitted or reflected radiation is received on corres- ponding photocells that move synchronously with the lines of radiant energy. During each scan of each sec- tion of the webs or sheets, a large number of compari- sons occur between the output signals of each photocell at a given first lateral position and at a second lateral position that is separated from the first one by a distance b that is of the order of magnitude of the width a and preferably half the width, of a streak- like defect to be identified. GV.1017
330537
Burtin Jean
Dictus Alfons J.
Geens Maurits
Simons Roger J.
Van Beeck Walter P.
Agfa-Gevaert Naamloze Vennootschap
Borden Ladner Gervais Llp
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