Slide fasteners with a third member or members, other than the slider, connected to the edges of adjacent stringers when closed, e.g. third member moved into position by a slider the third member being embraced by the stringers
Slide fasteners with a third member or members, other than the slider, connected to the edges of adjacent stringers when closed, e.g. third member moved into position by a slider the third member being embraced by the stringers