| 摘要 |
PROBLEM TO BE SOLVED: To provide an edge detection method which is capable of rapidly detecting an edge of a coating part coated with an active material on metal foil.SOLUTION: Coating parts 40b are coated while being spaced from each other on both sides of metal foil 40a. Detection terminals 55 and 56 are arranged for measuring electric resistance of an electrode substrate from one side coated with the coating part 40b on the metal foil 40a. The electric resistance of the electrode substrate is measured while relatively moving the metal foil 40a against the detection terminals 55 and 56. It is detected that an edge 40d of the coating part 40b has made contact with the detection terminal 55 when the value of the electric resistance to be measured has reached a predetermined threshold value. |
