Vibrating sieve and method for classifying a particulate material

摘要

A vibrating sieve (1)for classifying a particulate material, including an oscillator comprising an ultrasonic transducer (8) ; and at least two meshes (5) layered together and located on the ultrasonic transducer, wherein a lowermost mesh receiving a vibration from the ultrasonic transducer (8) transmits the vibration to an uppermost mesh to classify the particulate material fed thereon. The vibrating sieve may be used in a method of classifying a particulate material. The particulate material may comprise a magnetic core material for use in a carrier for a two component toner for use in an electrophotographic method.