System and method for 100% moisture and basis weight measurement of moving paper
US6355931B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1999 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Aug 30, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/34
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for characterizing a set of properties for a moving substance are disclosed. The system includes: a first near-infrared linear array; a second near-infrared linear array; a first filter transparent to a first absorption wavelength emitted by the moving substance and juxtaposed between the substance and the first array; a second filter blocking the first absorption wavelength emitted by the moving substance and juxtaposed between the substance and the second array; and a computational device for characterizing data from the arrays into information on a property of the substance. The method includes the steps of: filtering out a first absorption wavelength emitted by a substance; monitoring the first absorption wavelength with a first near-infrared linear array; blocking the first wavelength from reaching a second near-infrared linear array; and characterizing data from the arrays into information on a property of the substance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.