Slide fasteners

Claim 1

A SLIDE-FASTENER MEMBER COMPRISING AN UNDULATING FLEXIBLE CHAIN OF INTEGRALLY MOLDED LINKS OF PLASTIC MATERIAL RIGIDLY INTERCONNECTED ALONG ONE OF TWO OPPOSITE SIDES OF THE CHAIN AND SEPARATED BY TRANSVERSE GAPS AT THE OTHER OF SAID OPPOSITE SIDES, SAID LINKS BEIONG PROVIDED AT SAID OTHER OPPOSITE SIDES WITH OVERHANGING HEADS PROJECTING LONGITUDINALLY OF THE CHAIN INTO SAID GAPS FOR INTERLOCKING ENGAGEMENT WITH THE LIKE HEADS ON A CO-OPERATING SLIDEFASTENER MEMBER, EACH OF SAID LINKS HAVING TWO OPPOSITE LATERAL SURFACES WHICH EXTEND SUBSTANTIALLY TRANSVERSELY TO SAID OPPOSITE SIDES AND ARE EACH PROVIDED WITH A NOTCH LONGITUDINALLY ALIGNED WITH CORRESPONDING NOTCHES ON ALL OTHER LINKS, EACH LINK FURTHER HAVING A RECESS EXTENDING TOWARD SAID HEADS FROM SAID ONE OPPOSITE SIDES BETWEEN SAID LATERAL SURFACES, SAID NOTCHES TERMINATING AT SAID GAPS WHEREBY A FILLET DISPOSED IN THE ALIGNED NOTCHES CAN BE SEWN THROUGH SAID GAPS ONTO A FABRIC EDGE RECEIVED IN SAID RECESS, SAID CHAIN BEING A MEANDERING ROD COMPOSED OF GENERALLY U-SHAPED LINKS LYING IN EQUISPACED TRANSVERSE PLANES AND CONNECTING LIMBS ALTERNATELY DISPOSED ON OPPOSITE SIDES OF A LONGITUDINAL PLANE BISECTING SAID LINKS, SAID HEADS BEING CONSTITUTED BY FLATTENED ENLARGEMENTS ON THE BIGHT PORTION OF EACH U, SAID NOTCHES BEING INCISIONS IN THE LEGS OF EACH U.