Airtight bag packer

Claim 1

IN A BAG PACKER IN WHICH SOLID PARTICULATE MATERIAL IS DELIVERED OUT OF A HORIZONTAL SPOUT INTO A BAG, THE COMBINATION COMPRISING A FULLY ENCLOSED HOPPER FOR RECEIVING THE MATERIAL, A DELIVERY CONDUIT INCLUDING A VERTICAL SECTION WITHIN THE HOPPER CURVING INTO A HORIZONTAL SECTION EXTENDING OUTWARDLY THROUGH THE WALL OF THE HOPPER, MEANS COUPLING THE HORIZONTAL SECTION TO THE SPOUT, THE LOWER END OF THE VERTICAL SECTION FLARING OUTWARDLY ADJACENT THE BOTTOM OF THE HOPPER, MEANS FOR ADMITTING AIR UNDER PRESSURE INTO THE ENCLOSED HOPPER INCLUDING A POROUS FABRIC PAD ACROSS THE BOTTOM OF THE HOPPER AND MEANS FOR APPLYING AIR UNDER PRESSURE TO THE OUTSIDE OF THE FABRIC PAD TO PERMIT AIR TO DIFFUSE INTO THE INTERIOR OF THE HOPPER, MEANS DEFINING A SURFACE OF REVOLUTION HAVING A BASE MOUNTED ON THE PAD AND HAVING A TAPERED POINT PROJECTING TOWARD THE FLARED LOWER END OF THE DELIVERY CONDUIT TO FORM A NOZZLE, AND ADJUSTABLE MEANS FOR DEFORMING THE PAD TO MOVE THE NOZZLE FORMING MEANS TOWARD AND AWAY FROM THE LOWER END OF THE CONDUIT TO CHANGE THE SIZE OF THE NOZZLE ORIFICE.