| 摘要 |
PURPOSE:To prevent any adherence between adjacent plates, which might be caused during the initial charge, by forming the plate so that its peripheral part doesn't become in contact with the peripheral part of another plate. CONSTITUTION:The upper figure indicates a part of a plate which adheres to the same part of another plate, while tha lower figure is a magnified sectional figure of the peripheral part of the plate. The plate is manufactured by packing a paste into a grid of 105mm. thickness so that the tickness (X) of its central part 2 becomes about 2mm.. Right after packing of the paste into the grid is completed, a peripheral part 1 is pressed with a roller so that the thickness (Y) of the part 1 becomes 1.5mm., thereby making a plate the peripheral part 1 of which is thinner than the central part 2. As a result, since lead metal, which is deposited over the surface of the plate due to a reducing reaction caused during the usual initial charge, doesn't grow into a thickness of over around 0.25mm., any adherence of the plate at the peripheral part 1 is prevented. |
