Resonator unit, expansion method and device for heating containers

摘要

The resonator unit has a resonator chamber and an opening for receiving a container (10) in a predetermined position and for heating the container by microwaves coupled in the resonator chamber. Another opening is provided, by which the microwaves are coupled in the resonator chamber. The geometry of the resonator chamber is adapted relative to the predetermined position of the container in the former opening with a device for adjusting the geometry. Independent claims are also included for the following: (1) an expansion method for manufacturing a container; and (2) a device with a microwave generator for heating containers.