Patent ID: 8898869

Claim:
A touch fastener comprising: a base; and an array of discrete fastener elements each extending from the base and together forming with the base a contiguous mass of resin; wherein each of the fastener elements comprises: a stem rising from the base and having a flat side extending generally perpendicular to the base; and a head overhanging the base the stem, an underside of the head, and an upper surface of the base together forming a retention space boundary surface defining an edge with the flat side of the stem and having a region of innermost extent; wherein the region of innermost extent is spaced above the upper surface of the base and above a curvature discontinuity of the retention space boundary surface; and wherein the stem has a thickness, measured parallel to the base at the region of innermost extent in a vertical plane intersecting the boundary surface, that is at least twice an elevation of the region of innermost extent above the upper surface of the base.