| 摘要 |
1411648 Tubular bellows CHEMETRON CORP 10 Dec 1973 [14 Dec 1972] 57130/73 Heading F2P [Also in Division B3] A method of making a tubular corrugated bellows having radially spaced inner and outer plies 12, 16 from a bellows having concentric inner, intermediate and outer plies 12, 14, 16 includes the steps of sectioning at least one of said inner and outer plies 12, 16 into longitudinal sections, removing the intermediate ply from between the inner and outer plies, and welding said sections together to reform said inner and/ or outer plies 12, 16. As described the original bellows 10 (Fig. 1) consists of inner and outer pl es of metal and an intermediate ply 14 of wire mesh, metal or polyethylene, the bellows including corrugations 18 and end portions 20. The bellows 10 is then split longitudinally into two halves and the intermediate ply 14 is removed. The halves of the inner and outer plies 12, 14 are then welded together to reform the bellows, the welds 22, 24 of the inner and outer plies respectively being staggered by 90 degrees as shown in Fig. 3. Backing strips 26, 28 may be applied to the welds 22, 24 and a strip 30 (Fig. 5) of wire mesh may be inserted between the inner ply 12 and strip 28. Annular spacers (not shown) may be inserted between the plies 12, 16 at the ends 20 of the bellows. |
