Abstract: A channeled pulp rotor for use in a generally cylindrical or tub shaped pulper apparatus to make a slurry out of a mixture of solid and liquid materials for such things as paper making includes a rotor hub having at least one vane extending radially from a central axis of rotation of the rotor hub. The vane defines an impact surface between opposed top and bottom surfaces for impacting the solid materials upon rotation of the rotor and the impact surface defines a feed channel. The bottom surface defines a defibrating channel continuous with the feed channel so that materials flowing along or positioned in front of the rotating impact surface flow into the feed channel and continue from the feed channel to flow into the defibrating channel. In alternative embodiments, the feed channel and defibrating channels are eccentric to the axis of rotation of the rotor so that entries of the feed channel and defibrating channel are closer to the axis of rotation than exits of the channels.

Abstract: Flow spreading method and apparatus particularly adapted for use with a generally parabolic, slotted screening or dewatering surface, which redimensions the cross-sectional shape of a flow of material from a relatively narrow width, deep depth flow to a relatively shallow depth, wide width flow approximately equal to the width of the surface to which the flow is delivered. The apparatus includes a curved plate preferably having a substantially constant radius of curvature and a conduit which directs the material against the curved plate non-tangentially with respect to its surface to induce a smooth but rapid redirection and hence, redimensioning of the flow cross-sectional configuration. The conduit feeding the material may have at least its terminal portion constructed of a flexible material which allows the conduit outlet to be pressed against the surface of the curved plate and deformed somewhat to enhance flow spreading while still permitting the passage of relatively large objects through the conduit.