(under subclass 375) Subject matter wherein said continuously rotated cylindrical member is formed as a composite assemblage of elements rotating on the same axis, each of which elements extends in an axial direction to only part of the axial length of said member, but is otherwise similar in configuration to said member as to its toothlike projections.
(1) Note. The elements may be arranged so that the teeth of the side by side discs form a composite projection that is parallel to the axis, or may be arranged with the side by side discs rotationally displaced so that the teeth form a composite projection that is helical about the axis.