Patent ID: 7672619

Claim:
A wire bar which has a surface which carries a liquid and comes into contact with a regulator member, whereby an excessive amount of the liquid on the surface of the wire bar is scraped off, the wire bar comprising: a rod-like member; and a wire which has a first flat portion longitudinally formed in its peripheral surface, wherein the wire is wound around a peripheral surface of the rod-like member so that the first flat portion contacts the peripheral surface of the rod-like member, the wire further has a second flat portion longitudinally formed in its peripheral surface so that the second flat portion is approximately parallel with the first flat portion, the wire, which is wound around the peripheral surface of the rod-like member, is arranged so that the second flat portion forms the surface of the wound wire and that the second flat portion abuts on the regulator member, and a first condition below is satisfied where R 1 denotes the surface roughness of the first flat portion and R 2 denotes that of the second flat portion: R1>R2.