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Claim 1

A SLIDER IN COMBINATION WITH A PAIR OF ELONGATED SLIDE FASTENER MEMBERS FORMED FROM FLEXIBLE MATERIAL AND HAVING EACH A STRIP PORTION AND AN INTERLOCKING PORTION EXTENDING ALONG ONE LONGITUDINAL EDGE OF THE STRIP PORTION AND HAVING A THICKNESS GREATER THAN THAT OF SAID STRIP PORTION AND INCLUDING EACH A PAIR OF LEGS EXTENDING SUBSTANTIALLY PARALLEL TO SAID STRIP PORTIONS AND FORMED WITH INTERLOCKING PROJECTIONS ADAPTED; TO ENGAGE WITH AND DISENGAGE FROM EACH OTHER BY MOVING THE SLIDER LONGITUDINALLY ALONG THE SLIDE FASTENER MEMBERS SO AS TO MOVE THE LATTER SUBSTANTIALLY IN THE PLANE OF SAID STRIP PORTIONS TOWARD AND AWAY FROM EACH OTHER WHEREBY DURING ENGAGEMENT AND DISENGAGEMENT THE LEGS OF SAID MEMBERS WILL RESILIENTLY SPREAD, SAID SLIDER COMPRISING, A PAIR OF SUBSTANTIALLY PARALLEL SLIDER PLATES EXTENDING SPACED FROM EACH OTHER AND DECREASING IN WIDTH TOWARD ONE END OF SAID SLIDER; A PAIR OF FLANGES EXTENDING RESPECTIVELY ALONG LONGITUDINAL EDGES OF EACH PLATE AND PROJECTING THEREFROM TOWARD BUT SHORT OF THE FLANGES OF THE OTHER PLATE SO THAT OPPOSITE FLANGES ON SAID PLATES FORM ELONGATED SLOTS BETWEEN THEMSELVES FOR PASSAGE OF THE STRIP PORTIONS OF SAID SLIDE FASTENER MEMBERS THERETHROUGH, EACH OF SAID FLANGES HAVING AN INNER FACE SUBSTANTIALLY NORMAL TO AN INNER SURFACE OF THE RESPECTIVE PLATE; AND A WEDGE-SHAPED CONNECTING MEMBER CONNECTING SAID SLIDER PLATES IN THE REGION OF THE OTHER END OF SAID SLIDER AND HAVING A PAIR OF WEDGE FACES EACH EXTENDING BETWEEN OPPOSITE ENDS OF SAID CONNECTING MEMBER AND SUBSTANTIALLY NORMAL TO AND FROM ONE TO THE OTHER OF SAID INNER SURFACES OF SAID PLATES AND APPROACHING EACH OTHER TOWARD SAID ONE END OF SAID SLIDER AND INCLUDING AN ACUTE ANGLE BETWEEN THEMSELVES SO AS TO FORM RESPECTIVELY TOGETHER WITH SAID INNER SURFACES OF SAID PLATES AND SAID INNER FACES OF SAID FLANGES A PAIR OF DIVERGING CHANNELS MEETING A SINGLE CHANNEL FORMED BY SAID INNER SURFACES OF SAID PLATES AND SAID INNER FACES OF SAID FLANGES AND EXTENDING FROM SAID CONNECTING MEMBER TO SAID ONE END OF SAID SLIDER, SAID SINGLE CHANNEL HAVING AT LEAST IN THE REGION OF THE JUNCTION WITH SAID DIVERGING CHANNELS A HEIGHT CONSIDERABLY GREATER THAN THE COMBINED THICKNESS OF SAID INTERLOCKING PORTIONS OF SAID SLIDE FASTENER MEMBERS TO PROVIDE AMPLE CLEARANCE FOR THE SPREADING OF SAID LEGS DURING ENGAGEMENT AND DISENGAGEMENT OF SAID SLIDE FASTENER MEMBERS.