| 摘要 |
There is described a process of manufacturing sealed packages (5) containing a pourable food product from a web packaging material (3) moving along a predetermined path (P). The process comprises the steps of providing a recurring pattern of printed register marks (13) on the web packaging material (3); applying a recurring pattern (18) of bend or fold lines (19, 20, 21) on the web packaging material (3) by first operating means (14, 15) and as a function of the detected position of the printed register marks (13); applying new reference means (26), distinct from the bend or fold lines (19, 20, 21), on the web packaging material (3) by second operating means (27, 28) synchronized with the first operating means (14, 15); and performing one or more subsequent operations on the web packaging material (3) based on a synchronization pulse created by detection of the new reference means (26). |
