Tobacco conditioning apparatus

Abstract From the Canadian patent

A tobacco treating apparatus including an outer rotatable, hollow drum having a tobacco inlet at one end and a tobacco outlet at the opposite end with an inner hollow drum, extending through the tobacco inlet end generally coaxial with, the outer drum and extending a distance longitudinally into the outer drum a distance less than the entire length of the outer drum. The outer and inner drums cooperate to define an annular gas flow-through passageway which is open to an exhaust chamber. Tobacco to be treated is introduced into the inner drum and flows therefrom into the outer drum while a stream of tobacco treating gas is introduced into the tobacco outlet end to flow in counter-current …