| 摘要 |
A device for vacuum sealed packaging a product inserted in a flexible and thermoweldable container, it comprises at least:
- a vacuum chamber (2) closable in a sealed manner, connected to a vacuum source (33) and to the atmospherical environment (A) respectively by means of at least a first valve means (4) and at least a second valve means (5);
- sealing means (3) contained in the chamber and moved, between an opening condition and a closing and welding condition of the container, by a set of actuators (6) of the pneumatic type;
- each actuator (6) is provided with a first chamber (7) separated by a second chamber (8) by means of its mobile piston (9) connected to the sealing means (3), said first chamber (7) is in a flux connection with the vacuum sealed chamber (2) through a duct (10), said second chamber (8) is connected to the vacuum source (33) ant to the atmospherical environment (A) respectively by means of a third valve means (11) and at least a forth valve means (12). Said device (1) further comprises a flux reducer means (13) interposed between the second chambers (8) of the actuators (6) and the vacuum sealed chamber (2) in order to realize between them a reduced gas flux. |
