DRUM STRUCTURE FOR ROTARY DRUM FILTERING APPARATUS

A drum structure for rotary drum filtering apparatus, comprising a supporting drum carrying rib elements defining filtrate compartments which extend generally longitudinally along the drum circumference, and corrugated cover elements mounted to the rib elements by clips to form a cover circumferentially around the supporting drum over the filtrate compartments. Each groove of the corrugations in the outer surface of each cover element communicates with a therebelow filtrate compartment through a louvered opening arranged to discharge liquid in a direction generally towards the discharge end of the communicating filtrate compartment; and one side of each corrugated element is spaced from the thereadjacent portions of the drum structure to permit lateral expansion of the cover elements.