| 摘要 |
1,069,386. Seaming. KAISER ALUMINUM & CHEMICAL CORPORATION. Aug. 4, 1964 [Aug. 5, 1963], No. 31184/64. Heading B3J. [Also in Division E1] Channel - sectioned aluminium alloy wall or ceiling panels 14 have beaded, 15, and slewed, 16, edges, respectively, to their flanges, which edges are joined together by means of a portable rolling tool employing rolls 40. The tool is powered by an electric motor 52 mounted on the frame 41 and driving the rolls via reduction gearing comprising a worm 44 meshing with worm wheels 45 attached to the roll shafts. |
