Abstract: An apparatus for ultrasound screening with a screen frame a screen fabric arranged in the screen frame with at least one ultrasound converter for producing ultrasonic vibrations. Ultrasonic vibrations may be introduced into the screen fabric via sound-conducting connection with the ultrasound converter, and the location of the screen fabric at which the introduction of the ultrasonic vibrations into the screen fabric may be varied.

Abstract: An apparatus for ultrasound screening with a screen frame a screen fabric arranged in the screen frame with at least one ultrasound converter for producing ultrasonic vibrations, and with at least one means for introducing ultrasonic vibrations into the screen fabric. The means for introducing ultrasonic vibrations into the screen fabric is in sound-conducting connection with the ultrasound converter wherein at least one of the means for introducing ultrasonic vibrations into the screen fabric is movably arranged in such a way that the location of the screen fabric at which the introduction of the ultrasonic vibrations into the screen fabric is effected by the means for introducing the ultrasonic vibrations into the screen fabric can be varied by movement of the means for introducing the ultrasonic vibrations into the screen fabric relative to the screen fabric and to a method for ultrasound screening in which an apparatus operates as disclosed.

Abstract: In an ultrasound cutting device comprising an ultrasound transducer connected to a generator and provided with a sound conductor which is connected to a cutting blade and extends along a line which deviates from a straight line, the generator includes means for running the ultrasound waves in a controlled manner through a predetermined frequency range.