Press wall for a filter element of a filter press

Claim 1

In a press wall for a filter element of a filter press comprising a plurality of said filter elements clamped together edgewise forming a plurality of filter chambers for a suspension to be filtered, at least one of said filter elements having one of said press walls attached edgewise on one or both sides of said filter element which is or are movable by a pressurizing medium in one of said filter chambers, said press wall having a central region with a plurality of sectional projections unitary with said press wall and overlayed with a filter cloth on the wall surfaces of said press wall directed toward said filter chamber which form a drainage system under said filter cloth, said press wall having a continuous thick edge axially all around the periphery of the press wall and an adjacent edge region facilitating mounting on said filter element and a wall strip extending along said edge region and being bendable at least to the extent of the displacement of said press wall under pressure by said pressurizing medium, the improvement wherein the wall strip has a solid central web of the material of said press wall and the side of said press wall directed away from said filter chamber is provided with means for preventing excessive deformation of the wall strip including a plurality of solid abutting protuberances unitary with said web in the vicinity of said wall strip which form a plurality of stop pieces bounding said displacement of said press wall, said abutting protuberances being spaced uniformly apart in successive rows running along said periphery of said wall strip.