Method and device for marking wire

摘要

An object of the present invention is to provide a method and an apparatus for marking an electric wire at a low cost. An apparatus 1 for marking an electric wire forms a band mark 21 on a part of an outer face 5 a of the electric wire 3 . The band mark 21 is formed along the entire circumference of the part of the outer face 5 a of the electric wire 3 . The marking apparatus 1 tightens the electric wire 3 in a state where a tensile force is applied in a longitudinal direction. The marking apparatus 1 includes a nozzle 35 for injecting coloring agent toward an uppermost position 10 of the outer face 5 a of the electric wire 3 . The nozzle 35 has an open end 42 which is opposed to the electric wire 3 and capable of passing the coloring agent. A straight line L extending between a center C 1 of the open end 42 and a center C 2 of the electric wire 3 lies along a vertical direction.