Abstract: A dual belt conveyor system having a drive assembly that includes a gearbox for driving an upper belt and a lower belt between the drive assembly and a discharge assembly is disclosed. Both the upper belt and the lower belt have respective smooth and rough sides which are arranged such that the only the rough sides of the upper and lower belts are driven by the drive assembly. The gearbox includes an input shaft that drives an output shaft through a plurality of gears such that the input shaft and the output shaft rotate in opposite directions. In addition, the drive assembly includes an upper spring take-up mechanism that provides a means for automatically adjusting tension applied to the upper belt.

Abstract: A grain drying apparatus including a body member into which grain is fed, within which heated air passes through the grain bed to dry it, and from which it is discharged by a metering device, the retention time of the grain in the drying zone being determined by its rate of discharge, the discharge rate of the metering device being variable, and a modulating control system for regulating the metering device to vary its discharge rate in generally direct ratio to grain temperature attained within the drying zone, whereby continuous discharge of grain at a predetermined moisture content is obtained despite variations in the moisture content of the grain supplied to the drying zone.