Abstract: A filter cloth securing device attaches a filter cloth in the zone of the slurry port of a filter plate. A plurality of face-to-face arranged filter plates constitute a filter plate stack of a plate filter press. Each filter cloth securing device has two flanged sleeves inserted from either side of the slurry port and a threaded tightening sleeve which passes through the slurry port and which tightens the flanged sleeves to one another to thus clamp the filter cloth against the filter plate face. In the closed state of the filter plate stack face-to-face oriented flanged sleeves belonging to consecutive filter plates define an annular clearance and further, at least one flanged sleeve of the filter cloth securing device has on its outer face at least one protuberance which projects towards the outer flange face of an adjoining flanged sleeve, belonging to a consecutive filter plate. The protuberance ends at a distance from the last-named outer flange face.

Abstract: In a filter plate-and-diaphragm assembly for a filter press, which assembly includes a filter plate having a depressed base and a thickened marginal region defining a circumferential sealing edge, and a pressure diaphragm disposed at each side of the plate and having a cup shape to conform to the depressed base of the plate, the, or each, diaphragm is provided with a foldable tongue extending at least over the sealing edge along one side of the plate and securing the diaphragm to at least one lateral edge face of the plate.