A strap dispenser for a strapping machine includes a dancer arm connected to a double acting pneumatic cylinder assembly wherein the piston has a rod end and a larger area piston end. Air under the same pressure is applied to both ends before strap feeding begins and during the time that the strapping...http://www.google.com.au/patents/US3963191?utm_source=gb-gplus-sharePatent US3963191 - Strap dispenser for automatic strapping machine
