(under the class definition) Apparatus in which there is provided a plurality of partitioning members or partitioning member portions in which either (1) at least one of the partitioning members remains in a nonworking position while at least one other partitioning member performs work when the working member is rotating in one direction and vice versa or (2) a partitioning member having portions alternately movable to either one of two positions to perform work whereby the direction of working member rotation may be reversed.
