Patent ID: 6726023
Filing Date: 2004-04-27
Classification: B07B

Abstract:
Method for cleaning of the screening device of a screen, in which screen there has been arranged at leastsaid screening device which has openings for the separation of particles of different sizes into fines and coarses; an actuator means for moving the screening device; a first conveying means for guiding the material to be screened to the screening device of the screen; a second conveying means for moving the fines that have passed through the screening device; and means for guiding the separated coarses away from the screen, wherein said method comprises blowing a gas pressure medium at least at intervals through the screening device in a direction opposite to the direction of the fine material passing through the screening device, and cleaning the screening device by providing the gas pressure medium with a cleaning material having a particle size being at least mainly smaller than the size of the openings of the screening device.