The washing efficiency of removal of cooking and bleaching chemicals from cellulose paper pulp on horizontal belt washing filters is improved by disrupting the filter mat adjacent the belt intermediately of soft, displacement wash liquor applications to the filter mat topside. The objective may be achieved...http://www.google.de/patents/US4608122?utm_source=gb-gplus-sharePatent US4608122 - Method for washing a paper fiber on a belt washer using a sonic frequency disturbance
