Abstract: A separator for the separation of fibrous bark from core material of chopped or crushed stalks of a crop such as Kenaf having two or more hollow bodies for rotation on inclined axes, each having a perforated wall and upper inlet and lower outlet ends. Within at least one of the bodies is provided a plurality of longitudinally extending, circumferentially spaced baffles. With rotation of each body while downwardly inclined from the inlet to the outlet, a fibrous phase of the material is conveyed in turn to discharge from the outlet end of one body and conveyed into the inlet of another body, while a more solid phase is discharged through the perforated walls of the bodies.

Abstract: An apparatus for separating different phases of dry material, such as plant fibers, from each other includes a rotating hollow body on an inclined axis with an inner perforated wall, an outer perforated wall, and partitions at spaced intervals within the body to define compartments. The compartments are connected by central openings in the partitions, and each compartment is provided with longitudinally extending baffles. The outer perforated wall is divided into longitudinal sections by a gap. The material is fed into an upper input end and the different phases are separated as it moves within the downwardly inclined body toward an outlet end. The separated phases are carried away by conveyors.