Valved enema bag made from materials having different surface affinities

Claim 1

A BAG FOR ADMINISTERING ENEMAS AND THE LIKE AND ADAPTED TO CONTAIN A FLUID COMPRISING WALLS DEFINING A CHAMBER,THE CHAMBER DEFINING WALLS TERMINATING IN A FLUID OUTLET AT ONE END OF THE BAG TO PROVIDE A MEANS FOR DISCHARGING FLUID FROM THE CHAMBER, THE CHAMBER DEFINING WALLS TERMINATING IN A FLUID INLET NECK PORTION AT ANOTHER END OF THE BAG ESTABLISHING COMMUNICATION BETWEEN THE CHAMBER AND THE BAG EXTERIOR TO PROVIDE A MEANS FOR INTRODUCING FLUID INTO THE CHAMBER, THE INTERIOR SURFACE OF THE WALLS OF THE NECK PORTION BEING FORMED FROM A PLASTIC MATERIAL HAVING A RELATIVELY NONADHERENT DULL FINISH, VALVE MEANS IN THE NECK PORTION OF THE BAG TO PREVENT THE DISCHARGE OF FLUID INTRODUCED INTO THE CHAMBER OF THE BAG BACK THROUGH THE NECK PORTION, THE VALVE MEANS COMPRISING A PAIR OF SHEETS OF A PLASTIC MATERIAL, BOTH SURFACES OF EACH OF THE SHEETS HAVING A GENERALLY ADHERENT SHINY FINISH, THE SHEETS SPANNING THE INTERNAL WALLS OF THE PORTION OF THE BAG DEFINING THE FLUID INLET NECK AND POSITIONED OPPOSITE EACH OTHER AND THE DULL FINISH INTERIOR NECK WALLS, THE EDGES OF THE SHEETS BEING SEALED TO THE EDGES OF THE WALLS DEFINING THE INLET NECK PORTION OF THE BAG, THE SHEETS IN SEALED OPPOSED RELATION PROVIDING A CLOSEABLE PASSAGE THEREBETWEEN FROM THE BAG EXTERIOR TO THE BAG CHAMBER AND FORMING POCKETS OPENING INTO THE CHAMBER WHEREBY FLUID IN THE CHAMBER MAY ENTER A POCKET OPENING THEREIN AND URGE ONE OF THE FACING SHINY PLASTIC SHEETS INTO FLUID TIGHT ADHERENT ENGAGEMENT WITH THE OTHER OF THE SHINY PLASTIC SHEETS AND WHEREBY THE ADHERENCE AFFINITY OF THE SHINY SHEETS FOR EACH OTHER IS GREATER THAN THE ADHERENCE AFFINITY OF THE DULL FINISH INTERIOR WALLS OF THE BAG FORMING THE NECK PORTION, AND SAID FLUID OUTLET IS AN ELONGATED PLASTIC DISCHARGE CATHETER ADAPTED TO BE INSERTED INTO A BODY CAVITY SEALED TO SAID FLUID OUTLET PROVIDING FLUID COMMUNICATION WITH SAID CHAMBER,