The process of thermal reduction of a packaging device of steam reduction of a packaging and packaging contraida thus obtained

摘要

A package is steam-shrunk while subjected to a substantially constant sub-atmospheric pressure generated by a suction fan 22 operating at the same time as steam is generated maintaining the prevailing pressure within a chamber interior 20 at sub-atmospheric pressure in the presence of steam. The low pressure of the steam ensures that its termperature is well below the boiling point of water and avoids thermal damage to the material of a container 12 being shrunk.