Patent ID: 6135025
Filing Date: 2000-10-24
Classification: B41F,B41P

Abstract:
An apparatus for the application of a substance to a substrate through a screen in which the substance is periodically removed by infusion and withdrawal of a cleaning fluid comprising:a channel capable of fluid communication with a reversible pump, said channel being capable of fluid communication with both a source of the substance and the cleaning fluid;an applicator in fluid communication with said channel for delivering substance when in said channel to a screen or template;a reversible pump adapted to deliver substance to said applicator and remove substance from said applicator, deliver cleaning fluid to said applicator and remove cleaning fluid and substance from said applicator;the combination of said channel in fluid communication with the sources and said applicator and said reversible pump enabling a single channel to both deliver the substance and the cleaning fluid to the screen and remove both substance and cleaning fluid from the apparatus.