Assembly for folding polymeric film for machines for forming pouches and the like

An assembly for folding polymeric film for machines for forming pouches, the assembly comprising:

• a fixed frame for supporting a magazine for said polymeric film, an element for folding the film that arrives from said magazine and at least one heat-sealing device for the stable coupling of juxtaposed portions of said folded film that arrives from said folding element, wherein said folding element is mounted on a carriage and comprises at least one plate configured to fold the film along a folding line to draw closer to each other two flaps of the film at the opposite side of the folding line before it arrives to the heat-sealing device, said carriage being configured to translate along a guide which is integral with said frame, along a sliding direction of said film, with a speed that is variable in intensity and sign in order to cause a back and forth motion of said plate with respect to the at least one heat-sealing device, said at least one heat-sealing device acting on portions folded onto themselves of said film during a temporary stop step thereof, said carriage retracting with respect to said sliding direction of said film for the entire duration of the temporary stop step provided for the heat-sealing of the film.