Apparatus for eliminating the flutter of a paper web in the dryer section of a papermaking machine

摘要

An apparatus in the dryer section of a papermaking machine for preventing the flutter of a paper web comprises an air blow box located between adjacent cylinders within a loop of a support fabric (F) formed by a guide roll. The blow box includes a blow chamber, into whose wall opens a nozzle for providing an ejector assembly together with an opposite wall included in the box. The walls build therebetween a flow path direct towards an uncovered section of support fabric (F). An air current discharging from nozzle is delivered through the flow path and into a space confined by the uncovered section of support fabric (F) and thereby through the support fabric. The air current creates a vacuum in a space defined between the ejector assembly and a section of support fabric (F) carrying the web (W).