Patent ID: 6099690
Filing Date: 2000-08-08
Classification: D21F,D21G,Y10S

Abstract:
A system for determining the dry stock weight along the cross direction (CD) of a sheet of material that is produced from wet stock in a de-watering machine that includes a water permeable moving wire supporting wet stock, a dry end, and a headbox having a plurality of slices through which wet stock is introduced onto the wire, which system comprises:(a) an array of water weight sensor elements that (array) is positioned adjacent to and underneath the wire wherein the array is positioned in a transverse direction to the moving wire and generates first signals that are indicative of water weight CD profile made up of a multiplicity of water weight measurements at different locations in the CD;(b) a stationary sensor that is positioned at the dry end to measure the dry stock weight of a segment of the sheet of material that passes the stationary sensor, wherein the stationary sensor generates second signals that are indicative of the dry stock weight machine direction (MD) profile of the segment; and(c) means for developing a dry stock weight CD profile based on said first signal that are indicative of the water weight CD profile and said second signals that are indicative on the dry stock weight MD profile.