Method of measuring the quality properties of paper and/or board on moving webs
AssigneeSiemens Aktiengesellschaft
InventorsHermann Hartenstein, Uwe Lampe, Christoph Roth
Life of this patent
Estimating the term…
Abstract
A method for measuring the quality properties of paper and/or board on moving webs is disclosed. The present invention utilizes a staged evaluation method in which the basic properties of the paper or board and further properties are determined via multi-stage modeling.
Claims21
A method of measuring the quality properties of paper and/or board on moving webs, comprising using a contactless optical method to provide continuous optical spectra which are measured and evaluated by chemometric methods comprising a first modeling stage in which basic properties including material composition of the paper or board are determined from the measured spectra;
- a second modeling stage in which filter properties including freeness of the paper or board are determined from the measured spectra and the basic properties determined in the first stage;
- and a third modeling stage in which individual variables of said paper or board are determined.
Dependencies are inferred from the claim text.