System and process for detecting properties of travelling...

Details System and process for detecting properties of travelling... System and process for detecting properties of travelling...

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D21G 9/00 (2006.01) B65H 26/02 (2006.01) D06H 3/08 (2006.01) D21F 7/06 (2006.01) G01B 21/08 (2006.01) G01N 21/89 (2006.01)

Patent

CA 1326074

ABSTRACT OF THE DISCLOSURE To determine measurements such as basis weight and caliper of a travelling sheet during production, the sheet is repeatedly traversed with a scanning sensor and, during each traverse, measurements are taken at a plurality of slice locations. Then, a series of reference locations are selected which are spaced apart in the machine direction along the sheet surface, Then, for selected slices, measurement values are estimated based upon actual measurements taken at locations on the selected slices which are not spaced in the machine direction at the same spacing as reference locations.

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