| 摘要 |
PROBLEM TO BE SOLVED: To provide a marking method capable of marking a certain part of a covered electric wire surely and explicitly, and to provide a marking device and a manufacturing apparatus of covered electric wire including the marking device.SOLUTION: A transparent marking 120 is formed by performing discoloration processing for discoloring an insulation coating 103 by irradiating a certain part of a covered electric wire 100, produced by covering an enamel wire 102a with the insulation coating 103 composed of a crystalline resin, i.e., PPS resin, with a COlaser beam Lb. |
