Apparatus for removing a mixture of blasting media and cleaning residues from workpieces treated with blasting media

Apparatus according to claim 1 wherein said baffle means comprises a plate extending from adjacent said blowoff device at a point proximate said workpiece to a point over said damming means, said plate being configured to direct mixture onto said cross conveyer. 3. Apparatus according to claim 1 wherein said cross conveyer comprises a conveyer screw which is adjustable with regard to the distance thereof relative to

• the surface of said workpiece. 4. Apparatus according to claim 3 wherein said screw conveyer is arranged to convey said mixture from the surface of said workpiece in two directions laterally outwardly across said workpiece
• and transversely to the feed direction thereof. 5. Apparatus according to claim 1 wherein said damming means is arranged to define an adjustable gap
• with the surface of said workpiece. 6. Apparatus according to claim 5 wherein said cross conveyer includes a screw conveyer having a lower circumferential part spaced a distance from the surface of said workpiece and wherein said adjustable gap between said damming device and said workpiece surface is smaller than the distance between the workpiece
• surface and the lower circumferential part of said screw conveyer. 7. Apparatus according to claim 1 further comprising a frame having said cross conveyer, said damming means, said baffle means and said blowoff device arranged thereon, said frame being displaceable in a substantially vertical direction, said apparatus further comprising a scanning device for scanning the workpiece surface operatively connected with said frame.
• . Apparatus according to claim 7 wherein said scanning device comprises guide rollers arranged on said frame and in contact with the surface of
• said workpiece. 9. Apparatus according to claim 1 further including a screening plate forming a gap with said workpiece surface, said screening plate being arranged on said blowoff device parallel to the blasting jet
• thereof. 10. Apparatus according to claim 1 wherein said damming means, said mechanical cross conveyer said blowoff device and said baffle means are all arranged within an enclosed chamber overlying said workpiece and including a roof, said apparatus further including a flexible curtain extending from the roof of said chamber down to said blowoff device to prevent portions of said mixture from being deflected beyond said blowoff device in a direction forwardly of said feed direction of said workpiece.