| 摘要 |
PURPOSE:To realize easy and complete sealing of an electrode pole, which is performed by providing the concave part of a lid with an annular rib, by forming an irregular part on a part of the electrode pole which corresponds to the annular rib, and surrounding the irregular part with the molten resin of the rib. CONSTITUTION:A concave part 5 of a lid 5 made of a thermoplastic synthetic resin is provided with an opening 2, which has a diameter d' larger than a diameter d of an electrode pole 3 by 1-2mm.. The periphery of the opening 2 is provided with an annular rib 10 rising upward. The pole 3, which is provided with an irregular part 14 facing the rib 10, is made to penetrate the opening 2. After that, a heated circular fusion tool 11 is pushed down from the upside to make the rib 10 to be heated and fused, thereby making the irregular part 14 to be wrapped in the resin of the rib 10. Next, the concave part 5 is packed with a permeable adhesive 7 to make the outer surface of the rib 10 to be covered with the adhesive 7, thus a satisfactory sealing is performed. |
