Fuente: WIPO "tomato" There is descried a packaging machine (1) comprising a tube forming and sealing device (10) configured to form and longitudinally seal a tube (3) from the, in use, advancing web (4) of packaging material, a filling device, a package forming apparatus (16) configured to form and transversally seal the packages (2) and a pressurization promoting device (30) configured to guarantee a pressurization of the tube (3) The conveying device (5) is configured to advance the tube (3) along a tube advancement path (Q). The packaging machine (1) further comprises a control device (23) configured to interact with the tube (3) and to control an orientation and/or alignment and/or angular position of the tube (3). The control device (23) comprises a pair of interaction rollers (24) configured to engage, in use, the tube (3) at a contact station (25) arranged downstream of the pressurization promoting device (30). The control device (23) also comprises a movement unit (31) configured to modify relative positions of the interaction rollers (24) with respect to one another and with respect to an advancement direction (D) of the tube (3).