| 摘要 |
A method of producing a sealed package (3) of a pourable food product, the method including the steps of feeding a tube (2) of packaging material along an axis (A); moving a pair of first jaws (8) and a pair of second jaws (8') cyclically and alternately along sealing paths (G,G') parallel to the axis (A), and along repositioning paths (H,H'); moving the first jaws and second jaws (8,8'), as they travel along the sealing paths (G,G'), into a closed position in which respective first and second sealing members (16,17;16',17') grip the tube (2) and respectively form, at different times, a first and a second seal (9a,9b) sealing the tube (2) and defining respective opposite ends of the package (3); and moving the first jaws and second jaws (8,8'), as they travel along the respective repositioning paths (H,H'), into an open position, in which they are detached from the tube (2); the method also including the steps of acquiring a desired value (Y) of a quantity related to the weight of a package (3); and forming the second seal (9b) at a distance (L), which is a function of the value (Y), from the first seal (9a). A packaging unit for producing sealed packages in analogy to the method. |
