Dialyzer

Claim 1

TUBULAR DIALYSIS APPARATUS FOR REMOVING DIFFUSIBLE MATERIALS FROM A MIXTURE OR SOLUTION COMPRISING A FREELY EXPANSIBLE AND FLEXIBLE SAC UNIT DEFINING AN EXPANSIBLE PASSAGEWAY ADAPTED TO CONVEY A DIALZABLE FLUID THERETHROUGH, SAID UNIT INCLUDING A PERMEABLE MEMBER ENCLOSING FLUID SPREADING EXPANSIBLE AND CONTRACTIBLE GRID MEANS HAVING A SERIES OF ALTERNATELY DISPOSED MARGINAL OPENINGS ADAPTED TO PERMIT THE DIALYZABLE FLUID TO SWIRL THROUGH THE PASSAGEWAY AND HELP DISPOSE OF SOLUTES CONTAINED THEREIN, ANOTHER FREELY EXPANSIBLE AND FLEXIBLE UNIT ENCLOSING SAID FIRST UNIT ADAPTED TO CONDUCT A WASHING FLUID THERETHROUGH TO CARRY AWAY SOLUTES PERMEATING THE FIRST NAMED UNIT, INLET MEANS IN CONNECTION WITH THE FIRST NAMED UNIT FOR THE PASSAGE OF DIALYZABLE FLUID INTO SAID FIRST UNIT, OUTLET MEANS CONNECTED TO SAID FIRST UNIT FOR THE RESULTANT DIALYZED FLUID, AND INLET AND OUTLET MEANS IN CONNECTION WITH THE UNIT CONTAINING THE WASHING FLUID, SAID SAC UNIT BEING ADAPTED TO EXPAND AND CONTRACT IN VOLUME WHEN FLUIDS FLOW THERETHROUGH.