| 摘要 |
PURPOSE:To prevent the unevenness or failure in plating due to the overlap of metal caps in the plating process by coupling the metal-cap portions through a coupling portion provided to each of them. CONSTITUTION:Each square metal-cap portion 11 to be seam-welded is joined at constant intervals to a neighboring metal-cap portion by means of the coupling portion 11a through its four corners so that the metal-cap portions are not separated when a thin metal plate is punched. Moreover, the metal-cap portion 11 is provided with a feed portion 11c so that a continuous feed is possible. This permits the cap portions 11 to be hoopedly wound, plating to be continuously performed, and the metal caps to be plated without overlap. |
