Membrane plate for chamber filter presses

Claim 1

A membrane plate for chamber filter presses, the membrane plate comprising a frame means, a bracket plate means, a membrane means laminarly enclosed with a circumferential flat edge portion between said frame means and said bracket plate means. bearing means mounted in said bracket plate means for supporting said frame means so as to enable a relatively free movement therebetween and to enable said flat edge portion of the membrane means to be loosely enclosed when the chamber press is opened and to be clamped between the bracket plate means and frame means only by a closing pressure of the filter press, stop means of said bearing means for limiting the movement of the bracket plate means with respect to the frame means thereby defining a limit of a predetermined play therebetween, further means provided along at least a top edge of said membrane means, said further means resting on an outer edge of said frame means and said bracket plate means for supporting the membrane means between the frame means and the bracket plate means when the frame means and the bracket plate means are moved away from each other to the extent of the predetermined play, and wherein said frame means and said bracket plate means are each provided with a plurality of axially extending stepped bore means, said bore means are disposed such that the step thereof is arranged at ends of the bore means facing away from one another, said bearing means including a pluraltiy of expanding anchor means adapted to be inserted through the frame means, each of said anchor means including a head portion at one end thereof forming said stop means and a snap connection means at an opposite end thereof adapted to engage behind a shoulder of the stepped axial bore means of said bracket plate means so as to enable a detachment of the frame means from the bracket plate means.