| 摘要 |
<p>A hermetically sealed zip fastener (1) is described, said zip fastener comprising two rows of facing teeth (3, 4) mounted on two strips (5, 6) of compressively elastic material, the said teeth being joined together and disengaged by a movable slider (7) which can be displaced by gripping its outwardly projecting gripping member (8). In the zip fastener (1) according to the invention, on opposite sides of the strips (5, 6), the slider (7) is provided with a first concave capsule (10) and a second concave capsule (11) having a form substantially the mirror-image of each other and arranged with the perimetral edges (12, 13) of their concavities opposite and facing each other, the first capsule (10) having directed upwards a pin (14) perpendicular thereto and able to slide perpendicularly through a cavity (15) inside the slider (7) and through a hole (16) formed in the second capsule (11), and the gripping member (8) is connected to or has means (17, 18) which, when actuated, cause a simultaneous displacement of the first capsule (10) towards the second capsule (11) and of the second capsule (11) towards the first capsule (10) perpendicular to the plane (a) of the zip fastener (1), which causes a movement, towards each other, of the end parts (12t, 13t) of their perimetral edges (12, 13) sufficient to grip between them, with a desired pressure, the strips (5, 6).</p> |
