Patent ID: 7181810

Claim:
A slide fastener suitable for providing a water-resistant closure between two edges of material wherein the fastener comprises: first and second stringer tapes, each stringer tape having an upper and a lower surface, and an inner edge portion extending along the length thereof, wherein the inner edge portions of the first and second stringer tapes are arranged to oppose one another; each said stringer tape having a multiplicity of coupling elements disposed in a row along the corresponding inner edge portion thereof, wherein the coupling elements are anchored to the edge portion and project beyond it to define corresponding coupling element receiving recesses therebetween; a slider captively engaged with opposed rows of coupling elements of the first and second stinger tapes for reciprocal movement therealong, for bringing the coupling elements of the first stringer tape into and out of interlocking interengagement between pairs of adjacent coupling elements on the second stringer tape and vice versa as parts of the slide fastener are brought into closed and open conditions respectively; characterised in that: the slide fastener is provided with an elongate web of water-resistant film which extends longitudinally of at least one face of each of the first and second stringer tapes at least along a coupling element anchoring zone thereof and across at least a root portion of said coupling element receiving recesses defined between neighbouring coupling elements, beyond the inner edge portion of the stringer tapes, so as to provide film web portions within said recesses between said neighbouring coupling elements, which web portions abut against and conform about at least a front end face of the respective coupling element interlocked between said neighbouring coupling elements when the slide fastener is in the closed condition so that the web portions form a water-resistant seal against the front end faces of the coupling elements abutting thereagainst.