Gauge for measuring a sheet of material

Details Gauge for measuring a sheet of material Gauge for measuring a sheet of material

G - Physics

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G01D 5/48 (2006.01) G01B 15/02 (2006.01) G01D 5/52 (2006.01) G01N 23/16 (2006.01)

Patent

CA 1205925

ABSTRACT OF THE DISCLOSURE A system for measuring the values of a parameter, such as basis weight or moisture content, of a sheet of material is provided. The system includes a scanner head, having a radiation source and detector, which can pass transversely across the sheet material as the sheet material is fed axially. The head has a gap which accommodates the sheet material. The amount of radiation detected provides an indication of the parameter in question. It has been found that the precise spacing of the gap influences the results and so the invention provides a distance correction system to correct the measured parameter for variations in the gap dimension.

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