(57) In a fastener (1) for joining together in a fluid-tight manner two hems (3, 4) of
fabric or other impermeable material, comprising two rows of teeth (2) engaging with
each other as a result of the action of a slide and applied respectively onto each
of the said two hems, the said fluid-tight seal being obtained by compressing two
elastic members each integral with one of the aforementioned hems, each of the said
teeth (2) consists of several parts (2a, 2b) which are connected together and arranged
on opposite sides of the said fabric or impermeable material, and the said elastic
members consist of cords (5) of elastic material which are arranged in an intermediate
position between the said two parts (2a, 2b) of the said teeth (2) of each row, the
abovementioned cords (5) being dimensioned and arranged so as to be coplanar and so
as to be compressed and rest frontally against one another with a predetermined force
when the abovementioned teeth (2) are connected together by the said slide.
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