Disc filter and a method of constructing a disc filter sector

Abstract

A disc filter sector comprising a trapezium tubular support frame, and a trapezium screen frame supporting a screen doth, the trapezium filter medium dement being connected to the trapezium tubular support structure. More particularly, there is a pair of such filter sectors, and the sectors are connected together by an overlying cap.

1 . A method of constructing a filtering apparatus including: a support structure, the support structure having filtrate compartments communicating with openings in the filter medium for receiving liquid drained through the latter, filter medium elements, each having an end mounted to the support structure by an overlying cap, the support structure having a filter medium element end support portion, and each cap having a filter medium element end overlying portion, the filter medium element end overlying portion including a plurality of tabs spaced apart along a longitudinal axis of the filter medium element end overlying portion, each tab having a first portion that, when the filtering apparatus is assembled, extends perpendicular to the support portion, and a second portion angled relative to the first portion and extending parallel to a longitudinal axis of the cap, the support portion having tab receiving openings spaced apart along a the longitudinal axis of the support portions,
 the method comprising the steps of:   placing the filter medium element end on the support portion,   placing the filter medium element end overlying portion over the filter medium element end and inserting each respective tab into a respective opening in the support portion, and then   moving the filter medium element end overlying portion along the support portion, so that the tab second portion is then under the support portion, thus holding the cap on the support structure, with the filter medium element end trapped in between.   
     
     
         2 - 7 . (canceled)