Washing device for a cylinder in a printing machine

摘要

The device i.e. blanket washing device (GTW), has a washing cloth (10) for removing contaminants and ink from a surface of a cylinder i.e. blanket cylinder (GTZ). A cylindrical ultrasonic generator directs sound energy onto the surface of the cylinder for assisting a washing operation. A focusing device e.g. sonotrode, positioned in front of the ultrasonic generator concentrates the sound energy onto a linear focus region on the surface of the cylinder extending parallel to an axis of the cylinder. A cylindrical lens is made of plastic in which the speed of sound is higher than in water.