Patent ID: 6231722
Filing Date: 2001-05-15
Classification: D21G,Y10S

Abstract:
A method for monitoring a separation process of a web in a paper machine in which the web is separated from a roll and passed into a free draw, comprising the steps of:measuring a separation point of the web from the roll,measuring a difference in speed of the web across the separation point, wherein said difference in speed is the difference between a rotational speed of a center roll from which the web is separated and passed into said free draw and a rotational speed of a roll disposed after the separation point,establishing cause-to-effect ratios in the separation process based on the measurements of the separation point and the speed difference and transferring the measurements into a data collecting system,measuring at least one additional process or running parameter of the paper machine, andcomparing the measurements of the separation point and the speed difference with the at least one additional measured process or running parameter to thereby determine the manner in which the separation process of the web is affected by the at least one additional process or running parameter.