Abstract: Apparatus for extracting liquid from a slurry containing fine solids and liquid comprising an endless screen formed of woven monofilaments of thermoplastic material so as to define a multiplicity of small openings extending between opposite sides thereof and a supporting structure for supporting the endless screen for movement through initial and intermediate operative run portions along an underside thereof in such a way as to present an upper operative side thereof for the accumulation of solids thereon by the passage of liquid through the openings thereof. The screen supporting structure comprises a multiplicity of fixed closely spaced parallel bars formed of material having favorable wear and coefficient of friction characteristics with respect to the thermoplastic material of the endless screen.