Hermetically sealed zip fastener with slider which grips the teeth supporting strips

Abstract

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).

Description

technical field [0001] The present invention relates to parts of sealed zippers, ie those zippers which must form an impermeable barrier for the passage of fluids. Background technique [0002] Recently, many solutions have been devised to prevent the passage of water, air and gases under pressure between two rows of teeth facing each other and mounted on a strip of relatively compressively elastic material. As is known, the teeth are joined together by means of a so-called slider which can be moved by gripping a gripping member such as a pull tab. [0003] When the zipper is closed, on its end on which the above-mentioned slider is mounted, there is a risk of penetration between the teeth area and the slider part necessarily located between them, the above-mentioned precautions are of no use and only if the teeth are connected together And it is effective in the area where the toothed belts press against each other. Contents of the invention [0004] To overcome this dr...

AI Technical Summary

Problems solved by technology

[0003] When the zipper is closed, on its end on which the above-mentioned slider is mounted, there is a risk of penetration between the teeth area and the slider part necessarily located between them, the above-mentioned precautions are of no use and only if the teeth are connected together and effective in the area where the toothed belts press against each other

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