Feeding device of a continuous elongated element , the device comprising: - a first roller and a second roller arranged side by side and having respective axes of rotation substantially parallel to each other; - a motor and a transmission mechanically connected to said first and second roller for rotating said first and second roller about said respective axes of rotation with a respective rotation speed, so as to limit or prevent a variation of said respective rotation speed of said first and second roller as a consequence of an action exerted on at least one of said first and second roller not generated by said motor , wherein said first and second roller have respective side surfaces which develop with cylindrical symmetry about the respective axis of rotation , each side surface comprising a respective plurality of radial reliefs with circumferential closed development arranged in succession along a substantially axial direction , and wherein said pluralities of reliefs of said first and second roller are reciprocally intermeshed, wherein adjacent reliefs are in mutual close proximity along said substantially axial direction , for advancing, through said rotation of said first and second roller , said continuous elongated element along an advancement direction and cutting said continuous elongated element along a plurality of cutting lines substantially parallel to said advancement direction . - a first roller and a second roller arranged side by side and having respective axes of rotation substantially parallel to each other; - a motor and a transmission mechanically connected to said first and second roller for rotating said first and second roller about said respective axes of rotation with a respective rotation speed, so as to limit or prevent a variation of said respective rotation speed of said first and second roller as a consequence of an action exerted on at least one of said first and second roller not generated by said motor , wherein said first and second roller have respective side surfaces which develop with cylindrical symmetry about the respective axis of rotation , each side surface comprising a respective plurality of radial reliefs with circumferential closed development arranged in succession along a substantially axial direction , and wherein said pluralities of reliefs of said first and second roller are reciprocally intermeshed, wherein adjacent reliefs are in mutual close proximity along said substantially axial direction , for advancing, through said rotation of said first and second roller , said continuous elongated element along an advancement direction and cutting said continuous elongated element along a plurality of cutting lines substantially parallel to said advancement direction . wherein said first and second roller have respective side surfaces which develop with cylindrical symmetry about the respective axis of rotation , each side surface comprising a respective plurality of radial reliefs with circumferential closed development arranged in succession along a substantially axial direction , and wherein said pluralities of reliefs of said first and second roller are reciprocally intermeshed, wherein adjacent reliefs are in mutual close proximity along said substantially axial direction , for advancing, through said rotation of said first and second roller , said continuous elongated element along an advancement direction and cutting said continuous elongated element along a plurality of cutting lines substantially parallel to said advancement direction . <EOS>