| 摘要 |
<p>In order to weld a reinforcing tape piece (1, 2) formed of a synthetic resin to a separable bottom stop a separable bottom stop attachment portion of a slide fastener chain (3) by ultrasonic heating over a core portion (6a, 7a) and a main tape portion (6b, 7b) in a fastener tape (6, 7), a welding time and/or an amplitude which are/is suitable for welding the reinforcing tape piece (1, 2) to the core portion (6a, 7a) and the vicinity of the core portion, and a welding time and/or an amplitude which are/is suitable for welding the reinforcing tape piece (1, 2) to the main tape portion (6b, 7b) are preset respectively. The welding of the reinforcing tape piece (1, 2) to the core portion (6a, 7a) and the vicinity of the core portion and the welding of the reinforcing tape piece to the main tape portion (6b, 7b) are carried out in two stages in accordance with the welding time or the amplitude which is set.</p> |
