| 摘要 |
A sliding clasp is fitted to slide over and along the closure elements, to open and close the fastener. The closure elements are formed of spiral windings of a continuous filament. The upper stop (T) comprises stop elements intended to limit the upward movement of the sliding clasp. The stop elements are made of a synthetic resin based material, such as nylon or polyester, moulded on the closure element by thermofusion, e.g. by ultrasonic treatment. |
