| 摘要 |
PCT No. PCT/JP95/00650 Sec. 371 Date Jan. 3, 1996 Sec. 102(e) Date Jan. 3, 1996 PCT Filed Apr. 4, 1995 PCT Pub. No. WO95/27656 PCT Pub. Date Oct. 19, 1995An apparatus and method for forming a seal portion of a tubular body of synthetic resin is provided in which the seal portion has increased density and reduced foaming. The apparatus includes a pair of clamps that clamp an end portion of a tubular body of resin flat. A heater heats and fuses a projecting end portion projecting from the clamps. A bending member bends side projecting portions of the body formed during heating so that they are inwardly projecting. A press member presses the projecting end portion to form a seal portion.
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