DEVICE FOR PRINT IMAGE OBSERVATION
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United States of America Patent
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Issued Date -
Jul 14, 2016
app pub date -
Jul 31, 2014
filing date -
Jul 31, 2014
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Abstract
The invention relates to a device for observing a moving material web, in particular to observe a printed material web during the printing process, with a light source positioned on the front side of the material web to illuminate an observed section of the material web, with a camera positioned on the front side of the material web to record still images of the material web within the observed section, and with a light-diffusing surface positioned on the back side of the material web and within the observed section of the material web. In order to create a device for print image observation that can without exception detect color defects for any print job on an otherwise transparent material web, it is provided that the light-diffusing surface has elements to control the color of the light-diffusing surface.
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