Separable slide fastener

A separable slide fastener comprising:

• (a) a pair of warp-knit stringer tapes each including a pair of longitudinal warp-knit webs spaced transversely from each other with a longitudinal wale-free region therebetween, and a connecting thread interconnecting said webs and having substantially parallel portions extending transversely across said wale-free region and spaced longitudinally at an equal interval, thereby defining a plurality of substantially rectangular openings longitudinally in and along said wale-free region;
• (b) a pair of rows of coupling elements mounted on inner confronting longitudinal edges of said stringer tapes remotely from said wale-free region, respectively;
• (c) a slider movable along said pair of rows of coupling elements for engaging and disengaging the latter;
• (d) a separable bottom end stop comprising a box and a box pin extending therefrom, which are mounted on one of said warp-knit stringer tapes at one end thereof, and a pin mounted on the other stringer tape at one end thereof and insertable into said box;
• and
• (e) a reinforcing body mounted on each of said stringer tapes at said one end thereof and adjacent to said separable end stop and including a thin member and an endmost thick member both extending transversely across said wale-free region, said thin member covering at least one of said openings defined by the endmost two of said parallel portions, and said endmost thick region having a transverse portion contiguous to said thin member in the longitudinal direction of said stringer tape and extending about a portion of said thin member and said one end of said stringer tape.