Abstract: A filter plate arrangement for a filter press which includes a carrier plate, at least one membrane arranged on the side of the carrier plate having spacing ribs for positioning a filter cloth, a sealing edge frame for securing the membrane to the carrier plate with a fluid-tight connection and a chamber plate secured on an outer surface of the sealing edge frame is characterized by an improved design to limit stressing of the membrane as it moves from a filtering phase to a pressing phase. These improvements include the thickness of the frame adjacent an inner peripheral edge being substantially the same as the height of the spacing ribs and the chamber plate having an olique portion extending from the surface at an angle to a center plane of the carrier plate from a line immediately adjacent the peripheral edge so that during the pressing stage, the membrane will not be subjected to extreme bends to cause rupture or tearing thereof.

Abstract: A membrane filter plate for a filter press with a one-piece, plastic carrier plate, at least one membrane arranged on one side of the carrier plate and provided with spacing bosses for the engagement of a filter cloth and a sealing rim surrounding the carrier plate and the membrane and connecting the same in substantially fluid-tight manner. The sealing surface of the sealing rim parallel to the carrier plate median plane being arranged on the side having the membrane or on either side of the carrier plate. At least one support boss is provided in the central region of the carrier plate. The end face of the support boss parallel to the carrier plate median plane being substantially aligned with the sealing surface of the sealing rim parallel to said median plane and provided laterally with a rotationally symmetrical transition surface facing the membrane which slopes in the direction of the carrier plate median plane.

Abstract: Membrane filter plate for a filter press or the like with a carrier plate and sealing rim, in which the actual membrane and the sealing rim frame are made in one piece from solid plastic and the thus constructed frame membrane is connected to the carrier plate in sealing and self-centering manner.

Abstract: A snap fastener which comprises a male part, a female part, and the male part has on its top an insertion detent means for holding a decorative cover part.