Paper machinery

Claim 1

APPARATUS FOR COATING ONE SURFACE OF A MOVING WEB, COMPRISING A BACKING ROLL FOR SUPPORTING THE OPPOSITE SURFACE OF THE WEB, A FRAME INCLUDING MEANS FOR SUPPORTING SAID ROLL, A COATING CHAMBER INCLUDING A BOTTOM PLATE EXTENDING LENGTHWISE OF SAID ROLL AND A BACK PLATE PROJECTING SUBSTANTIALLY ABOVE THE LEVEL OF SAID BOTTOM PLATE AND FORMING THE BACK WALL OF SAID CHAMBER, A FLEXIBLE BLADE EXTENDING LENGTHWISE OF SAID ROLL AND SAID BOTTOM PLATE, MEANS CLAMPING SAID BLADE TO SAID PLATE WITH THE FRONT EDGE PORTION OF SAID BLADE EXTENDING FREELY BEYOND SAID PLATE FOR FLEXIBLE ENGAGEMENT WITH SAID ROLL, MEANS FORMING SIDE EDGE WALLS ON SAID CHAMBER INCLUDING SEALS FOR ENGAGING THE SURFACE OF SAID ROLL MEANS MOUNTING SAID CHAMBER ON SAID FRAME BELOW SAID ROLL FOR RAISING AND LOWERING MOVEMENT WITH RESPECT TO SAID ROLL, MEANS ESTABLISHING A RAISED OPERATING POSITION OF SAID CHAMBER WHEREIN SAID SEALS AND SAID BLADE ENGAGE THE SURFACE OF SAID ROLL THROUGH THE WEB TO BE COATED, MEANS FOR ROTATING SAID ROLL IN SUCH DIRECTION THAT THE SURFACE THEREOF MOVES FROM SAID BACK PLATE TOWARDS SAID BLADE, MEANS FOR SUPPLYING COATING COMPOSITION TO THE INTERIOR OF SAID CHAMBER FOR DISCHARGE BETWEEN SAID ROLL AND SAID BLADE, AND MEANS CONTROLLING THE OPERATION OF SAID MOUNTING MEANS DURING LOWERING MOVEMENT OF SAID CHAMBER TO CAUSE SUBSTANTIALLY UNIFORM RADIAL MOVEMENT OF SAID EDGE WALLS WITH RESPECT TO SAID ROLL THROUGHOUT A RANGE OF SUCH MOVEMENT AT LEAST EQUAL TO THE THICKEST WEB TO BE COATED.