Title: Threshing apparatus

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Abstract: The thresher apparatus includes a rotatable tapered threshing cylinder assembled within and in a concentrically spaced coaxially aligned operative relation with a rotatable tapered grain separating cylinder, with the space between the cylinders defining a threshing zone that has an inlet for receiving the grain to be threshed and an outlet for discharging the residual material. The separating cylinder has concave grates and separating grates in the peripheral surface thereof to provide for a grain threshing action and for a separation, by centrifugal force, of the threshed grain from the residual material over the entire peripheral surfaces of the cylinders. The spacing between the cylinders to accommodate different grains under varying field conditions may be varied by relative axial movement between the cylinders and by a variation in the relative rotational speeds of the cylinders.


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