Abstract: A filter device particularly directed to the straining of materials for coating paper products which device is provided with a tapered baffle element to particularly aid in the back flushing of the filter to provide cleaning thereof and said baffle having a plurality of arcuately spaced fin members thereon for supporting of a filter element thereabout. This filter element is formed of a replaceable material having a plurality of apertures therethrough which material is normally non self supporting and which material gains its filtering support and positioning by the finned structure which will support the filtering element in both the normal filter operation and the back wash operation.