Device for detecting properties of a moving web of paper with an infrared light source
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United States of America Patent
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Feb 24, 2004
Grant Date -
Dec 5, 2002
app pub date -
Jun 11, 2002
filing date -
Dec 11, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device for detecting properties of a moving web of paper, more specifically for production control in the paper making process, comprising an infrared lighting device suited for illuminating the web of paper with infrared light and a detector device for detecting light reflected or transmitted by the web of paper which is provided with a light input portion. The infrared lighting device is provided with a light source in the form of a long, rod-shaped infrared emitter, the light source being accommodated in a housing having a front plate facing the web of paper. An exit window, through which the light from the light source passes to impinge upon the web of paper, is tight-fittingly received in an aperture in the front plate.
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