Waste cleaning improvement for carding machines

Claim 1

In a carding machine having in series a feed roll, a lickerin roll, a main cylinder, and a doffer roll mounted for rotation on a supporting card frame having closed sides and having a doffer waste collection area having an end wall and said wall in said doffer waste collection area having an opening therein to admit the flow of air longitudinally through said card frame, and a lickerin waste collecting chamber beneath the lickerin and feed rolls, a plenum chamber having a downwardly sloping waste-collecting chute in said lickerin waste-collecting chamber, said chute terminating in a waste-collecting plenum intake nozzle, and a suction exhaust means communicating with said plenum chamber to induce a flow of air longitudinally along the interior of the carding machine frame from the doffer waste and lickerin waste chambers to exhaust said waste to a remote location, side doors mounted on said supporting frame immediately adjacent to said lickerin waste chamber, the improvement comprising at least one elongated sloping opening on each of said side doors at opposite sides of said frame and in juxtaposition and inclined relative to the sloping waste-collecting chute to admit a flow of air therethrough in a cross current flow to the longitudinal flow of air induced to flow through said frame and over said chute to said nozzle thereby sweeping substantially transversely across said sloping chute directly adjacent to said elongated sloping opening to remove downwardly waste normally collected on said chute adjacent to said side doors to said nozzle with other waste collected on said chute.