Apparatus and method for correcting basis weight measurements using surface topology measurement data
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United States of America Patent
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Jun 14, 2011
Grant Date -
Aug 20, 2009
app pub date -
Feb 20, 2008
filing date -
Feb 20, 2008
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Abstract
An apparatus and method for correcting an areal weight measurement of a stretchable web using surface topology measurement data is disclosed. Areal weight may comprise a basis weight or a water weight. The apparatus measures a surface of the stretchable web with a basis weight measuring device to obtain a rough basis weight measurement. The apparatus then measures the surface of the stretchable web with a surface topology measuring device to obtain surface topology measurement data. The apparatus comprises a controller that corrects the rough basis weight measurement of the stretchable web using surface topology measurement data. The corrected basis weight measurement may be used as a feedback value in a real time manufacturing process of the stretchable web.
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