Abstract: A filter press having a number of filter plates, each of which includes a center hole, with a filter cloth hanging over each filter plate. The filter cloths include a corresponding center hole, and a flexible coupling member having a tubular stem with a flanged base, wherein the flanged base is positioned around the hole on one side of the cloth. The tubular stems are inserted within a coupling cylinder which is positioned within the hole of the filter plate. A method is described for hanging the filter cloths onto the filter plate by inserting one of the stems into one end of the coupling cylinder, and then inserting the cylinder into the hole in the filter plate. A tool is then used to reverse the stem of the coupling member of another filter cloth, and then the same tool is removed permitting the restoration of the stem while positioning it within the other end of the coupling cylinder.

Abstract: A filter cloth for a leaf filter of a pressure vessel including a flat retaining sack or bag which encloses the leaf filter. An outlet opening is contained in the sack through which the filtered product can be extracted. A releasable closure device is provided along the greater part of one side edge of the sack to permit removal of the sack from the leaf filter for cleaning and replacement thereof. A reinforcing material is provided at the outlet opening to provide a tight seal about the outlet of the leaf filter. Preferably, the sack is substantially circular but may have any configuration conforming to the shape of the leaf filter.

Abstract: A filter bag which includes an annular thin-walled band having a plurality of discrete resilient tabs extending from its outer surface along two axially separated paths. A flexible collar is secured to the outer surface of the band and conforms to the shape of the tabs to provide discrete protrusions along the two paths. The band and collar assembly is secured to one end of the filter bag. The end of the filter bag can snugly fit into a socket of a cooperating member, whereby a portion of the socket is positioned in the space between the two separated paths and is retained by the protrusions disposed on either side thereof. The retained portion of the socket includes an enclosed annular ring.