Patent ID: 7799170
Filing Date: 2010-09-21
Classification: D21F,D21G

Abstract:
1. A method of treating a web having a width in a crossmachine direction, in a papermaking machine drying line employed after a wire section, the method comprising the steps of: dewatering a web supported at times by at least one of a fabric or drying wire, and within the dewatering step increasing the crossmachine direction width of the web by applying a stress of a selected magnitude to an edge of the web to cause an increase in crossmachine direction width in a portion of the web; wherein the stress is applied between the edge of the web and a selected position on the web spaced toward a centerline of the web, which selected position is held against stress directed toward the edge of the web; and wherein the web travels over a first rotating roll forming a whole, the first rotating roll having an axis of rotation wherein the whole roll rotates about the axis of rotation, and the stress is applied to the web by holding the edge of the web to a first rotating shell mounted to a first end of the first rotating roll, but having an axis of rotation which is tilted with respect to the axis of rotation of the first rotating roll so that the web is strained in the crossmachine direction between the edge of the web and the selected position on the web spaced toward the centerline of the web by action of the first rotating shell; wherein the web is strained in a plurality of steps comprising: after first straining the web between the edge of the web and the selected position; wherein the web is strained the second time while traveling over a second rotating roll forming a whole, the second rotating roll having an axis of rotation wherein the whole role rotates about the axis of rotation, and the stress is applied to the web by holding the edge of the web to a further first rotating shell mounted to a first end of the second rotating roll, but having an axis of rotation which is tilted with respect to the axis of rotation of the second rotating roll so that the web is strained, by action of the further first rotating shell, in the crossmachine direction between the edge of the web and the second selected position on the web spaced further toward the centerline of the web than the selected position; and