The heating normally takes place in an aseptic chamber (8).

Before embossing the packaging material web (2) is heated to a temperature of at least 60 0C.

The packing machine (1) has embossment means placed in or below an aseptic chamber (8) and above a product level (76).

The gas comes into contact with the whole pre-formed package – inside and out, removing any contaminants that might have been present before entering the aseptic chamber.

The gas comes into contact with the whole preformed package – inside and out, removing any contaminants that might have been present before entering the aseptic chamber.

The Tetra Evero Aseptic, however, uses a new gas-phase sterilization technique which involves the cartons passing through a unique aseptic chamber in pairs where they are exposed to hydrogen peroxide.