| 摘要 |
A unit for sterilizing a web (2) of packaging material on a machine (1) for packaging pourable food products, the unit having a bath (7) containing a sterilizing agent, in which the web (2) is fed continuously; a process chamber (8) connected to an outlet (12) of the bath (7), and which houses wringing rollers (18) interacting with the web (2), and a nozzle (22) for directing a stream of air on to the web (2) and removing residual sterilizing agent from the web; an aseptic chamber (25) communicating with the process chamber (8) via an opening (27) for passage of the web (2), and in which the web (2) is folded and sealed longitudinally to form a tube (29) which is filled continuously with the product for packaging; and an air processing circuit (24) for controlling process conditions, and having a conduit (56) for feeding a first stream of sterile air into the aseptic chamber (25), a conduit (54) for feeding a second stream of sterile air to the nozzle (22) and housing a heater (69) for controlling the temperature of the air supplied to the nozzle (22), and a distributor for regulating the two streams of air. <IMAGE> |
