Combination dryer and cooler

Claim 1

IN A COMBINATION DRYER-COOLER WHEREIN SUBSTANTIALLY COMPLETE DRYING AND COOLING OPERATIONS TAKE PLACE WITHIN A SINGLE ROTARY UNIT, A SUBSTANTIALLY CYLINDRICAL SHELL HAVING A MATERIAL INLET END FOR RECEIVING MATERIAL TO BE DRIED AND COOLED WITHIN THE SHELL AND A MATERIAL DISCHARGE END FOR DISCHARGING MATERIAL THAT HAS PASSED THROUGH THE SHELL, MEANS MOUNTING SAID SHELL FOR ROTATION ABOUT ITS LONGITUDINAL AXIS SUCH THAT MATERIAL DEPOSITED INTO SAID INLET END IS ADVANCED LONGITUDINALLY THROUGH SAID SHELL TOWARDS SAID MATERIAL DISCHARGE END, AN OUTLET GAS DUCT MOUNTED ADJACENT THE MATERIAL INLET END OF SAID SHELL FOR PERMITTING GASES TO BE DISCHARGED FROM SAID SHELL, A DRYING GAS DUCT EXTENDING THROUGH THE MATERIAL DISCHARGE END OF SAID SHELL AND A SUBSTANTIAL DISTANCE INTO THE INTERIOR THEREOF, SAID DRYING GAS DUCT DEFINING A REGION FOR THE INJECTION OF DRYING GAS INTO SAID SHELL, AND TOGETHER WITH SAID OUTLET GAS DUCT, DEFINING A DRYING SECTION THEREBETWEEN AND INSIDE OF THE SHELL SO THAT WHEN INJECTED, SAID DRYING GAS MOVES THROUGH SAID DRYING SECTION TO THE OUTLET GAS DUCT, A COOLING GAS DUCT MOUNTED ADJACENT THE MATERIAL DISCHARGE END OF SAID SHELL FOR INTRODUCING A COOLING GAS DIRECTLY INTO THE SHELL, SAID COOLING GAS DUCT