Unit for sterilizing a web of packaging material for a machine for packaging pourable food products

摘要

There is described a unit for sterilizing a web of packaging material advanced along a given path, having, along a longitudinal portion thereof, a succession of pre-applied opening devices and adapted to be transformed in a plurality of sealed packages containing a pourable food product; the unit comprises a bath, containing a sterilizing agent in which the web with the opening devices is advanced, and an aseptic chamber connected to an outlet of the bath and housing drying mechanism for removing residual sterilizing agent from the web; the drying mechanism comprise an ejector located at a distance from the outlet of the bath and configured so as to direct a stream of air transversally to the web and onto the longitudinal portion of the web provided with the opening devices.

主权项

1. A unit for sterilizing a web of packaging material advanced along a given path, having, along a longitudinal portion thereof, a succession of pre-applied opening devices and adapted to be transformed in a plurality of sealed packages containing a pourable food product, said unit comprising
a bath containing a sterilizing agent in which said web with said opening devices is advanced, said bath possessing an outlet; an aseptic chamber connected to said outlet of said bath and housing drying means for removing residual sterilizing agent from said web; wherein said drying means comprise:
ejecting means located at a distance from said outlet of said bath and configured so as to direct a stream of air transversally to said web and onto the longitudinal portion of said web provided with said opening devices; andtwo air knives located on opposite sides of said web when said web is advanced along the given path, wherein each of said two air knives comprises a nozzle for directing a stream of air on one of two faces of said web, and a guide wall for guiding said stream of air, in use, in a direction opposite to a travelling direction of said web; and wherein said ejecting means are arranged on one of said guide walls.