Method and apparatus for flue sig liquid tight welding in a closable light-wall flue signal into a liquid container as well as a giesstutzen in this case for

摘要

The invention relates to an ultrasonic welding, apparatus for a flexible fluid container fabricated of synthetic thermoplastic material having a welding surface, thin walls and a rim, and closed but for a single opening for fluid-tight welding of the connecting piece into the container, which is also fabricated of synthetic thermoplastic material. A welding ring focusses the ultrasonic energy to the welding surfaces. A ring-shaped base terminates the connecting piece.