Abstract: A filter assembly having clamping means for resiliently engaging marginal areas of the filter media and wherein the clamping means comprises elongate members engaging material facial portions of the filter media and clips supportingly carrying the elongate members with each of the clips having an arm connected to the elongate members and being pivotally movable to first and second positions and wherein in the first position the elongate members carried by respective arms are in biased clamping engagement with the filter media and wherein in the second position the elongate members are away from and out of clamping engagement with the filter media to facilitate replacement thereof.

Abstract: An air filter comprising a rotatably mounted drum assembly having a generally cylindrically shaped skeletal framework, with a plurality of side-by-side substantially circular filter media support members projecting radially outwardly from and supported by the cylindrical framework and with each of the circular support members being of modular construction, and wherein each of the circular support members has opposing sloping sides thereof arranged in radially outwardly converging relationship with a band of pliable filter media secured to and overlying the circular support members for rotative movement therewith. Suction apparatus in the form of a plurality of stationary nozzles extend in the valleys between adjacent circular support members for effecting removal of the collected waste from the filter media.