A PORTION OF A PAPERMAKING MACHINE IS DISCLOSED WHERE PAPER STOCK DISCHARGE FROM A HEADBOX IS DEPOSITED UPON A FOURDRINIER TYPE WEB FORMING WIRE PROVIDED WITH DRAINAGE FOIL ASSEMBLIES BENEATH THE WIRE (SUBSTITUTED FOR TABLE ROLLS), AND A FOIL ASSEMBLY IS SUPPORTED BENEATH THE WIRE BY A SUPPORT MECHANISM CARRIED ON RAILS BENEATH AND PARALLEL TO THE EDGES OF THE WIRE. THE ASSEMBLY INCLUDES A BODY WHICH IS CONNECTED TO THE SUPPORT MECHANISM AND A FOIL CAP MOUNTED ON TOP OF THE FOIL BODY. THE FOIL BODY AND FOIL CAP ARE PROVIDED WITH A DOVETAIL CONNECTION THEREBETWEEN, A CLAMP BAR OVERLAPPING BOTH THE BODY AND CAP AND PIVOTALLY CONNECTED TO THE BODY, AND A FLUID PRESSURE INFLATABLE TUBE BETWEEN THE BAR AND BODY ON A SIDE OF THE PIVOTAL CONNECTION OPPOSITE THE CAP, THE SECURELY CLAMPING THE CAP TO THE BODY UPON INFLATING THE TUBE.