Web alignment device for aligning a web (5, 4) within a packaging machine comprising an engagement surface for supporting the web (5, 4) and a clamp assembly for clamping the web (5, 4) on at least a clamp portion of the engagement surface; characterized by comprising an alignment control assembly adapted to determine and/or detect a correct alignment of the web (5, 4); wherein the alignment control assembly comprises: - at least a control unit for generating at least a trigger signal if the web (5, 4) is correctly aligned; - at least a first sensor device connected to the control unit and being configured to detect and/or determine at least a desired position of a first section of the web (5, 4) and to send at least a first signal to the control unit if the first section is positioned in the desired position; and - at least a second sensor device connected to the control unit and being configured to detect and/or determine at least a desired position of a second section of the web (5, 4) distinct from the first section and to send a second signal to the control unit if the second section is positioned in the desired position; wherein the control unit is configured to generate the trigger signal indicating the correct alignment if the first sensor device and the second sensor device send contemporaneously, in use, respectively the first signal and the second signal to the control unit. characterized by comprising an alignment control assembly adapted to determine and/or detect a correct alignment of the web (5, 4); wherein the alignment control assembly comprises: - at least a control unit for generating at least a trigger signal if the web (5, 4) is correctly aligned; - at least a first sensor device connected to the control unit and being configured to detect and/or determine at least a desired position of a first section of the web (5, 4) and to send at least a first signal to the control unit if the first section is positioned in the desired position; and - at least a second sensor device connected to the control unit and being configured to detect and/or determine at least a desired position of a second section of the web (5, 4) distinct from the first section and to send a second signal to the control unit if the second section is positioned in the desired position; - at least a control unit for generating at least a trigger signal if the web (5, 4) is correctly aligned; - at least a first sensor device connected to the control unit and being configured to detect and/or determine at least a desired position of a first section of the web (5, 4) and to send at least a first signal to the control unit if the first section is positioned in the desired position; and - at least a second sensor device connected to the control unit and being configured to detect and/or determine at least a desired position of a second section of the web (5, 4) distinct from the first section and to send a second signal to the control unit if the second section is positioned in the desired position; wherein the control unit is configured to generate the trigger signal indicating the correct alignment if the first sensor device and the second sensor device send contemporaneously, in use, respectively the first signal and the second signal to the control unit.