ultraljudsaggregat with 'round strap' arbetsdel which includes a flänsformigt committee which extends around the work part

摘要

The disclosure relates to an ultrasound unit with an annular tool (4) or sonotrode intended for welding packaging containers of irregular or hexagonal cross section. The tool has a flange-shaped projection (8) with a polygonal working surface (5) extending around the tool. The mass of the projection (8) is less than 20 per cent of the total mass of the tool (4) and, as a result, in practice does not affect the dissipation of the ultrasonic waves in the tool in any negative manner.