| 摘要 |
The fluidtight zip fastener comprises a pair of fluidtight zip fastener carrying tapes (2, 3) carrying the zip fastener coupling member rows (4, 5) and which are in each case formed by a base tape (6) with a soft, synthetic rubber or similar covering layer (7). They engage on one another by their borders. A pair of continuous coupling member rows (4, 5) is sewn to the zip fastener carrying tapes (2, 3) in a spaced offset position transversely to the longitudinal edges of said carrying tapes in such a way that the facing borders (9) of the soft covering layers (7) are in contact with one another along a longitudinal plane, which intersects the zip fastener at a central axis thereof and runs at right angles to the zip fastener principal plane. The facing borders (9) of the zip fastener carrying tapes project over said longitudinal plane, when the coupling member rows (4, 5) are disengaged and namely to such an extent that said borders (9), when the coupling member rows (4, 5) are engaged, are bent away from the side carrying the coupling member rows (4, 5). They diverge in such a way that they extend roughly at right angles to the zip fastener principal plane. The soft covering layers (7) of the facing borders (9) of the two zip fastener carrying tapes (2, 3) engage on one another under pressure action and thus ensure the fluidtightness condition. |
