John R Wagner JrJohn Wagner is a Director of Crescent Associates, Inc., which specializes in plastic films and flexible packaging. He holds numerous patents on flexible packaging films and coating technology, has contributed to and co-edited The SPE Guide on Extrusin Technology and Troubleshooting and The Plastics Technician's Toolbox-Extrusion, and is the Editor-in-Chief of the Journal of Plastic Film and Sheeting. He is on the SPE Extrusion Division Board of Directors. Read More Read Less