| 摘要 |
1,045,279. Seaming. TANNOID Ltd. Oct. 9, 1963 [Oct. 10, 1962], No. 38420/62. Heading B5K. A method of joining heat-weldable strip material comprises laying the parts to be joined one over the other, placing a band of heat-weldable woven material around the strips so as to enclose the area of the join and applying heat and pressure to the area. The pressure is preferably maintained while the parts cool. The strips and the band may be of cotton, linen, nylon, rayon or glass and coated with polyvinyl chloride or other thermoplastics material or with unvulcanized rubber. Strips 14, 15 are placed in overlapping relation in a die cavity provided between plates 1, 2 which areheated by electrically-heated platens (not shown). The die cavity may be tapered (Fig. 4, not shown), or may be provided with a central depression to accommodate more than two overlapping layers of straps (Fig. 5, not shown). Joins may be made at several, say five, positions along plates 1, 2 by constructing the plates of appropriate configuration (Fig. 1, not shown). Preferably the upper heating platen is mounted on a horizontal axis for movement in relation to the lower, fixed platen. The platens may be maintained at about 200‹ C., but the time of pressing may be reduced by employing higher temperatures. If required, weights may be hung on the upper platen. Stainless steel strips are placed above and below the strip material to avoid uneven edges to joins. |
