Patent ID: 6511581
Filing Date: 2003-01-28
Classification: B03C,D21G,D21H

Abstract:
A method for controlling particulate matter generated during the manufacture or processing of a web paper and board comprising:positioning a first pair of electrodes proximate a location where the particulate matter is generated, one of the first pair of electrodes being positioned proximate a first side of the web and the other of the first pair of electrodes being positioned proximate a second side of the web; setting a potential difference between the two electrodes of the first pair of electrodes so as to generate a corona discharge between the two electrodes of the first pair of electrodes that causes an ion-blast wind toward one electrode with a lower potential, the ion-blast wind being sufficient to transport particulate matter passing between the two electrodes to travel toward the electrode with the lower potential so as to contact the web; positioning a second pair of electrodes downstream of the first pair of electrodes in a direction of movement of the web, one of the second pair of electrodes being positioned proximate a first side of the web and the other of the second pair of electrodes being positioned proximate a second side of the web; and setting a potential difference between the two electrodes of the second pair of electrodes so as to generate a corona discharge between the two electrodes of the second pair of electrodes that causes an ion-blast wind toward one electrode with a lower potential, the ion-blast wind being sufficient to cause particulate matter on the web passing between the two electrodes to leave the web to travel toward the electrode with the lower potential.