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Claim 1

A DRUM FOR A DRUM TYPE FILTER COMPRISING IMPERFORATE END DISKS; AN INPERFORATE SHEE SURROUNDING AND FIXED TO THE PERIPHERIES OF SAID END DISKS; LONGITUDINALLY EXTENDING, PARALLEL, CIRCUMFERENTIALLY SPACED DIVIDER BARS FIXED TO SAID IMPERFORATE SHEET, FORMING SHALLOW COLLECTING COMPARTMENTS ABOUT THE PERIPHERY OF SAID DRUM; MEANS FOR DISCHARGING THE LIQUID FROM SAID COMPARTMENTS INCLUDING CONDUIT MEANS LEADING FROM EACH OF SAID COMPARTMENTS; FLEXIBLE MOLDED GRID-LIKE SCREEN MEMBERS MOUNTED BETWEEN ADJACENT DIVIDER BARS ABOUT THE PERIPHERY OF SAID DRUM, EACH OF SAID GRID-LIKE MEMBERS COMPRISING INTERSECTING INTEGRAL BARS FORMING THEREBETWEEN RELATIVELY LARGE OPENINGS TO ALLOW RELATIVELY FREE DRAINAGE, FLANGE MEANS ON SAID MEMBERS COACTING WITH SAID DIVIDER BARS TO SECURE SAID MEMBERS ON SAID DRUM, CERTAIN OF SAID GIRD-LIKE SCREEN MEMBES BEING A PARALLELOGRAM FORM, AND CERTAIN OTHERS BEING OF TRUNCATED RECTANGULAR FORM; AND LEG MEANS INTEGRAL WITH SAID GRID-LIKE SCREEN MEMBERS RESTING ON THE BOTTOM OF SAID SHALLOW COMPARTMENTS AND SPACING SAID GRID-LIKE MEMBERS FROM THE BOTTOM OF SAID COMPARTMENTS.