IMPROVEMENTS IN AND RELATING TO RADIO FREQUENCY WELDING

摘要

Disclosed is a mandrel (230) for use in Radio Frequency (RF) welding, wherein the mandrel comprises first and second conductive portions (232, 236) separated by an insulating material (234) , such that different potentials may be applied to the first and second conductive portions. Also disclosed is a method of RF welding and a method of manufacturing a mandrel .