Patent ID: 6612158
Filing Date: 2003-09-02
Classification: G01K,G01N

Abstract:
A method for measuring the temperature and moisture of a web comprising the steps of:positioning a measuring beam having a surface beneath the web, the surface being at least partly curved in the running direction of the web and extending across the web in the cross direction and spaced a distance from the web, an air cushion being formed between the moving web and the curved surface; indirectly measuring the temperature and moisture of the web by measuring the temperature and moisture of said air cushion by means of a plurality of detectors which are in communication with respective first openings formed in the curved surface in spaced relationship with one another in the cross direction of the web; positioning each detector so that a detector end is positioned at a distance from the curved surface of the beam, a recess being defined thereby between each first opening and the detector associated there with; and directing an air blow to said respective first openings in front of each detector in order to clean the recess in front of the detector.