After World War II, entrepreneurs fresh out of the university used electric furnaces to melt scrap into reinforcing bars with a company then called Structural Metals. The minimill (now CMC Steel) has been joined by manufacturers including Alamo Group, building roadside mowing equipment; Continental Automotive Systems (was Motorola), making electronic powertrain control modules and emissions sensors; Hexcel, producing reinforcements for composites using glass fiber, carbon fiber, aramids, and specialty yarns; Minigrip, manufacturing re-closeable plastic bags for food and home storage; Tyson Foods, processing chicken. In 2009 Caterpillar opened a plant assembling diesel engines. Most recently Rave Gears, a make of precisions gears, opened a plant and headquarters.