Method and apparatus for on-line web property measurement
US8148690B2 · kind B2 · utility
2Cited by
9References
19Claims
0Family size
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Key dates
| Filing date | Sep 24, 2009 |
| Grant date | Apr 3, 2012 |
| Priority date | — |
| Expiry date | Mar 6, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/8663
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Web measurement system monitors properties of a web during manufacture without chopping measuring radiation during web measurement. A single chop is performed at each sheet edge or every nth sheet edge to measure edge temperature and edge thermal radiation for correction for Planckian radiation. Correction factors, including Planckian radiation correction factors, are derived for each point in a web profile. The measuring system also enables derivation of correction factors during operation in a single point and similar machine operating modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.