Sensor and system for continuous determination of paper...

Details Sensor and system for continuous determination of paper... Sensor and system for continuous determination of paper...

G - Physics

01

L

73/119, 354/28

G01L 5/04 (2006.01)

Patent

CA 1324445

ABSTRACT A sensor for continuous sensing of a quality of paper related to its elastic modulus and stiffness including a paper support in the form of a segmented ring, and a free running wheel which depresses the paper in the center of the ring as the paper passes over it. Force transducers mounted to sense force exerted on the segments provides a measure of a characteristic of the paper related to its elastic modulus and bending stiffness. The segments are aligned so that separate determinations of machine direction and cross-direction characteristics are made. The outputs of this sensor, together with basis weight, thickness and paper velocity are used to determine the strength of the paper on a continuous basis. Separate values of machine direction and cross-direction strength can be determined, as can a burst pressure strength.

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