Apparatus and method for correcting basis weight...

Details Apparatus and method for correcting basis weight... Apparatus and method for correcting basis weight...

2011-06-14

2011-06-14

Hug, Eric (Department: 1741)

Paper making and fiber liberation

Processes and products

With measuring, inspecting and/or testing

C162S263000, C162S111000, C162SDIG004, C162SDIG010, C073S159000

Reexamination Certificate

active

07959763

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.

REFERENCES:
patent: 3196072 (1965-07-01), Wirtz
patent: 5243407 (1993-09-01), King et al.
patent: 5269883 (1993-12-01), Beuther
patent: 5277761 (1994-01-01), Van Phan et al.
patent: 5512139 (1996-04-01), Worcester

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