The Plastics Manufacturing Center's eighth annual Extrusion Seminar, drawing on the capabilities and modern facilities of Penn College's plastics and polymer technology department, wrapped up three days of classroom lectures and laboratory time Thursday. Well-known extrusion consultant Chris Rauwendaal presented course topics and college plastics faculty led participants in hands-on training on industry equipment, including single- and twin-screw extruders, blown film line, injection molder, melt indexer and tensile tester. ( Photos by Cindy Davis Meixel, photo editor)