Apparatus for treating porous web material

Claim 1

APPARATUS FOR TREATING A MOVING WEB OF POROUS MATERIAL COMPRISING THE COMBINATION OF AN ENCLOSED DISPERSING CHAMBER, A ROTATING DISPERSING BLADE WITHIN AND AT THE BOTTOM OF SAID CHAMBER, AN OPEN INLET DUCT INCLUDING A FUNNEL FOR FEEDING TREATING MATERIAL INTO SAID CHAMBER, SAID INLET DUCT INCLUDING A PORTION OF RELATIVELY SMALL CROSS SECTIONAL AREA EXTENDING INTO SAID CHAMBER AND TERMINATING OVER THE CENTRAL PORTION OF SAID DISPERSING BLADE SO THAT THE INCOMING TREATING MATERIAL ENTERS DIRECTLY OVER SAID BLADE THEREBY CREATING AN ATMOSPHERE OF SUSPENDED PARTICLES WITHIN SAID CHAMBER, OPPOSED WEB GUIDE AND SEAL MEANS EACH EXTENDING ACROSS THE WIDTH OF THE CHAMBER AND INCORPORATED IN AN UPPER PART OF A CHAMBER WALL AT ONE END OF SAID CHAMBER FOR GUIDING A CONTINUOUSLY MOVING WEB OF POROUS MATERIAL THROUGH SAID CHAMBER, AND OFFTAKE MEANS LOCATED AT THE TOP OF THE CHAMBER WHEREBY SAID ATMOSPHERE IS DRAWN THROUGH THE POROUS MATERIAL TO THEREBY LEAVE THEREON A UNIFORM PATTERN OF TREATING MATERIAL.