(under the class definition) Apparatus comprising a plurality of working members* spaced longitudinally of a rotary shaft such that they rotate in different planes transverse of the shaft.
SEE OR SEARCH THIS CLASS, SUBCLASS:
175, for a device comprising a plurality of working members* which differ from each other structurally, i.e., a characteristic other than size or orientation, and which may be spaced longitudinally along a shaft.
