A process for forming, handling, circumferentially sealing, and inverting a thin plastic half bag to an inwardly tapered, continuous inner side wall of an outer plastic container. A non-metallic mandrel is used as a tool for thermoforming a half bag over the top of the mandrel. The top of the mandrel...http://www.google.es/patents/US5416303?utm_source=gb-gplus-sharePatente US5416303 - Method for induction sealing an inner bag to an outer container
Method for induction sealing an inner bag to an outer container
