Method and apparatus for visually inspecting a substrate on a printing press
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United States of America Patent
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app pub date -
Apr 9, 2004
filing date -
Sep 17, 2002
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Abstract
The present invention relates generally to the field of printing presses, and specifically to a method and apparatus for visually inspecting a web moving on a printing press using a CMOS based image recording device and preferably a LED light source. The LED light source includes at least two colors of light, such as white and blue, for highlighting various ink colors with respect to the web.
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