On-line paper sheet strength determination method and device

Details On-line paper sheet strength determination method and device On-line paper sheet strength determination method and device

G - Physics

01

N

354/21

G01N 33/34 (2006.01) G01N 21/86 (2006.01)

Patent

CA 1327239

ON-LINE PAPER SHEET STRENGTH DETERMINATION METHOD AND DEVICE ABSTRACT This invention relates to a device and method for determination of the strength of a sheet of paper, and more specifically, to a device and method to determine the strength based upon monitoring the variations in the intensity of a narrow beam of light transmitted through the sheet as the sheet moves perpendicularly through the beam. A process for determining the strength of a moving sheet of paper comprising: (a) measuring the average basis weight of the sheet; (b) measuring the local basis weight of the sheet; (c) measuring the transmittance of the sheet; (d) measuring the line speed of the sheet; (e) measur- ing the floc size of the sheet; and (f) determining the strength of the sheet based upon the average basis weight, the local basis weight, the transmittance, the floc size and the line speed.

578616

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