Diaphragm of a press intended for separating liquid and solid materials

A diaphragm for a press for separating liquid and solid materials wherein the press comprises a cylindrical press vessel disposed in a substantially horizontal position, the pressure vessel having a substantially cylindrical wall interconnecting a pair of substantially circular front walls, said diaphragm connected to said cylindrical wall in a longitudinal plane passing through the central longitudinal axis of the cylindrical wall of the cylindrical press vessel in the interior of said press vessel to divide the press vessel into a pressure space and a pressing space, said diaphragm comprising a fabric having two sides and at least one plastic-coated sheet on one of said sides of said fabric, said diaphragm further comprising a first portion having a shape substantially corresponding to the cylindrical wall of said cylindrical pressure vessel and a semi-circular portion directed toward one of said front walls, said diaphragm being subjected to main stresses in a direction when a pressure source is imposed on said diaphragm in said pressure space, said fabric having a plurality of thread systems and at least one of said thread systems disposed in said direction of imposed main stresses, said semi-circular diaphragm portions comprising a plurality of segment-like sectors, one of the thread systems in each of said sectors extending substantially parallel to a central radial bisector of each said sector.