Abstract: A dialysis apparatus for the purification of a fluid comprises at least one substantially flat plate having a passage system on at least one side, said passage system being adapted to be connected to inlet and outlet lines for the fluid to be purified, at least one further substantially flat plate having a passage system on at least one side, said passage system being adapted to be connected to inlet and outlet lines for a purification fluid, and at least one diaphragm disposed between the sides of the plates provided with the passage systems.

Abstract: A dialysis apparatus for purifying a fluid substance, particularly blood, containing contaminants which are diffused through semi-permeable diaphragms into a purification liquid. The apparatus comprises first plates having planar surfaces respectively disposed between opposing second plates provided with bosses on the surfaces facing the planar surfaces of the first plates. A plurality of these plates is alternately assembled into a stack with a diaphragm arranged between the opposite surfaces of the first and second plates. Portions of the clamped diaphragm are forced between the bosses of the second plates a predetermined distance to define two channels for the circulation of the two fluids.