| 摘要 |
The zip fastener is assembled of two strips (1) of an elastic material each fitted with a row of teeth to be connected by a sliding element. The elastic strips (1) are made of two layers (1e,7) forming sealing bulges (6) between the teeth (3). Each of the teeth (3) is assembled of two parts (3a,3b) attached opposite each other to both surfaces of the strip (1). The teeth (3) are made of a synthetic resin inserted into prepared openings at the strip (1) and sticking to the material without any glue required. |
