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Abstract

A vibratory tumbling and conveying apparatus for surface treating workpieces by tumbling the workpieces in a vibrating bed of surface treating media. The apparatus comprises an elongated housing having an arcuate bottom wall concaving facing the interior of the housing. A vibratory generating device is structurally associated with the housing and generates a vibratory force imparted to the housing comprising a force couple component having a moment constantly varying in magnitude between zero and a maximum, and a linear component constantly varying in magnitude between a maximum and zero. The magnitude of the force couple component and the magnitude of the linear force component vary inversely to one another. The vibrating force imparted to the housing causes points on the concave side of the arcuate surface to move in an ellipical path having its major axis disposed at an acute angle to the imaginary line tangent to the arcuate surface at the point.

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First Claim