Patent ID: 11117691

Abstract:
An automatic packaging machine, comprising an input conveyor belt, a reel holder, containing a reel of single-fold film, a contoured shaped film former, a sealing bar, a collecting device, an output conveyor belt, and a pulling device with at least an upper driving wheel and a lower driving wheel in contact with a layer of single-fold film interposed between said wheels which, rotating in opposite directions, move the single-fold film along the automatic packaging machine; a drive shaft, which transfers a rotational motion to the driving wheels to move the single-fold film along the automatic packaging machine; a lifting actuator, which moves the upper driving wheel away from the lower driving wheel (or vice versa) when sealing the single-fold film, so as to reduce the tension exerted by the driving wheels on the single-fold film during the sealing step and having a lifting actuator actuated by the drive shaft.