Water extracting device for paper machines

Claim 1

DEWATERING APPARATUS FOR USE WITH A MACHINE OF THE FOURDRINIER TYPE HAVING A SCREEN ARRANGED TO BE DRIVEN IN A PREDETERMINED DIRECTION, COMPRISINGF DEFLECTOR MEANS FOR MOUNTING BENEATH THE SCREEN, TO EXTEND TRANSVERSELY IN RELATION TO SAID PREDETERMINED DIRECTION AND HAVING AN UPPER SURFACE AND A LOWER SURFACE, THE UPPER EDGE OF SAID UPPER SURFACE OF THE DEFLECTOR MEANS CONTACTING THE UNDER SURFACE OF THE SCREEN FOR AT LEAST A PORTION OF ITS LENGTH, SAID UPPER SURFACE DIVERGING DOWNWARDLY FROM THE SCREEN IN SAID PREDETRMINED DIRECTION TO POSITION THE LOWER EDGE THEREOF FROM SAID SCREEN, APERTURES EXTENDING THROUGH SAID DEFLECTOR MEANS AND CONNECTING SAID UPPER SURFACE WITH SAID LOWER SURFACE, AND MEANS TO ESTABLISH A FLUID PRESSURE GRADIENT BETWEEN THE TWO SAID SURFACES TO CAUSE FLOW OF LIQUID THROUGH SAID APERTURES, WHEREBY THE BOUNDARY LAYER OF LIQUID FLOWING OVER SAID UPPER SURFACE IS ENERGIZED AND HYDRODYNAMIC SUCTION BETWEEN SAID DEFLECTORS MEANS AND SAID SCREEN IS IMPROVED.