Multifunction work apparatus

A drawing and yielding assembly, comprising:

• a lower contrast roll, the contrast roll being an idle roll and rotatable around its axis of rotation, the contrast roll having first, second and third annular portions, the third annular portion disposed between the first and second annular portions, the contrast roll being vertically adjustable relative to a base frame in a direction orthogonal to the axis of rotation, and at least two motor-driven upper motorized rolls, the motorized rolls positioned on a periphery of said contrast roll to define passage gaps for passage of wires, and in that said contrast roll has a larger diameter larger than a diameter of each of said motorized rolls;
• wherein a first one of the motorized rolls is positioned at an upstream location relative to a work direction and a second one of the motorized rolls is positioned at a separate downstream location relative to the work direction and spaced apart from the upstream location;
• wherein said motorized rolls are each provided with a first circumferential seating and at least a second circumferential seating, each circumferential seating suitable to receive a respective wire;
• and
• wherein a first positioning member is associated with said contrast roll and is configured to move said contrast roll in a direction parallel to said axis of rotation of said contrast roll, in order to define at least:
• a first operating condition, in which said contrast roll cooperates with said first circumferential seatings and said second circumferential seatings of said motorized rolls such that a first one of the wires is engaged between the first annular portion and the first circumferential seatings and a second one of the wires is engaged between the second annular portion and the second circumferential seatings,
• a second operating condition, in which said contrast roll cooperates only with said first circumferential seatings of said motorized rolls such that the first one of the wires is engaged between the third annular portion and the first circumferential seatings, and
• a third operating condition, in which said contrast roll cooperates only with said second circumferential seatings of said motorized rolls such that the second one of the wires is engaged between the third annular portion and the second circumferential seatings.