Velcro 1950s. The fastener consisted of two components: a lineal fabric strip with tiny hooks that could "mate" with another fabric strip with smaller loops, attaching temporarily, until pulled apart. Initially made of cotton, which proved impractical, the fastener was eventually constructed with nylon and polyester. De Mestral gave the name "Velcro", a portmanteau of the French words "velour" ("velvet") and "crochet" ("hook"), to his invention as well as his company, which continues to manufacture and market the fastening system. Velcro Velcro BVBA is a privately held company that produces fasteners and other products. It is known for being the original
Rail fastening system spring steel clips that attach to the underside of the rail baseplate and bear against the sides of the sleepers to prevent longitudinal movement of the rail, either from changes in temperature or through vibration. Rail fastening system A rail fastening system is a means of fixing rails to railroad ties (North America) or sleepers (British Isles, Australasia, and Africa). The terms "rail anchors", "tie plates", "chairs" and "track fasteners" are used to refer to parts or all of a rail fastening system. Various types of fastening have been used over the years. The earliest wooden rails were fixed to