HOOK PIECE STRUCTURE OF INTEGRALLY MOLDED SURFACE ZIPPER FASTENER

摘要

In a molded surface fastener, a hook structure has on at least one surface of a stem (11) an upright reinforcing rib (13) extending from the base of the stem (11) to part of a hook-shape engaging portion (12). The reinforcing rib (13) projects upwardly with respect to the rear surface of the hook-shape engaging portion (12) and terminates in an apex (O3) whose height is smaller than the height of the apex (O2) of the hook-shape engaging portion (12) and greater than the height of the line tangential to the hook-shape engaging portion (12) at the tip (O1) and substantially parallel to the upper surface of the substrate sheet (15).