| 摘要 |
PURPOSE:To make a stamped mark ever so clear, by using such one that is stamped into a case receiving mold and forming it with a press at the stage of work after an opening part of a case is bent inward and sealed liquidtightly. CONSTITUTION:A nonstamped case is used for a call case 1, and an opening part is bent inward, sealing it liquidtightly, thus a cell proper is finished up. And, after a cell completion process D, a marking process E is installed, using metalforming pressure of a press, and a metal mold stamping the designated display contents on the surface of a case receiving mold is used whereby a stamped mark is formed on the bottom of the case. With this constitution, stamping a mark on the cell case is performable in a clear-cut manner. And, in the case where there is a cell different in its internal constitution even if cell size is identical, the case is enough with one kind alone, so that supply for parts is very easy and the parts allowable inventory is reduced, thus reduction in the cost of production is made attainable. |
