Automatic rotary marking machine for in-line hot-marking with coloured ribbons of cables in PVC and PE from min. diameter Ø6mm to max. diameter Ø140mm. The machine must be installed between the cooling tank and the haul-off. The coloured ribbon placed on the roll-holder slides between the marking stamps – designed and made by Gnata – and the cable: the marking wheel is heated and thermoregulated and allows the hot-marking through thermal transfer of the writing on the cable. The fusion of the surface of the cable with the coloured ribbon grants a coloured marking without the need of inks or solvents.