Patent ID: 8691323
Filing Date: 2014-04-08
Classification: B31F,D21F,D21G

Abstract:
1. A method of monitoring and optionally controlling the application of a coating containing a Performance Enhancing Material (PEM) on a surface of a creping cylinder wherein the cylinder rotates in a machine direction and a crepe blade is engaged to the cylinder, the method comprising: (a) applying a coating to the surface of a creping cylinder, pressing a paper web into the coating, and impacting the paper web with a crepe blade; (b) determining if a thickness of the coating is sufficiently non-uniform so as to exceed a threshold known to cause blade chatter by measuring the thickness of the coating on the surface of a creping cylinder by a differential method at a location downstream relative to the machine direction from where the coating has been applied to the cylinder but upstream relative to the machine direction to where paper web is pressed into the coating, wherein said differential method utilizes a plurality of apparatuses that do not physically contact the coating; (c) determining if chatter is in fact occurring in the crepe blade; (d) measuring the moisture of the coating and adding a moistening composition to the coating at one or more defined zones of the creping cylinder in response to variations in the measured moisture such that would cause non-uniform coatings in excess of the threshold; (e) adjusting the application of said coating in one or more defined zones of said creping cylinder in response to the thickness of said coating so as to provide a uniform thick coating on the surface of the creping cylinder when the measured thickness is sufficiently non-uniform that it would exceed the threshold and the measured moisture indicates that the non-uniform coating is not due to variations in moisture; and (f) applying an additional device(s) to monitor and optionally control other aspects of the coating on a creping cylinder aside from the thickness of the coating.