Patent ID: 6085437
Filing Date: 2000-07-11
Classification: D21F

Abstract:
A water-removing apparatus for a papermaking process, the apparatus having a machine direction and a cross-machine direction perpendicular to the machine direction, the apparatus comprising:a web support designed to receive a fibrous web thereon and to carry the fibrous web in the machine direction;at least one pulse generator designed to produce and discharge oscillatory flow-reversing air or gas having a predetermined frequency in the range of from 15 Hz to 1500 Hz; andat least one gas-distributing system in fluid communication with the at least one pulse generator for delivering the oscillatory flow-reversing air or gas to a predetermined portion of the web, the gas-distributing system terminating with a plurality of discharge outlets juxtaposed with the web support such that the web support and the discharge outlets form an impingement region therebetween defined by an impingement distance, the plurality of the discharge outlets comprising a predetermined pattern defining an impingement area of the web corresponding thereto.