In an ultrasonic welding method and apparatus for molded resin materials, molded resin materials, whose corresponding parts to be welded to each other have been superposed one upon the other, are held between a welding horn and a molded material receiving section, and the corresponding parts of the molded...http://www.google.es/patents/US5487802?utm_source=gb-gplus-sharePatente US5487802 - Ultrasonic welding method and apparatus for molded resin materials
Ultrasonic welding method and apparatus for molded resin materials
