发明名称 |
Method of forming a protruded shaft for an electronic memory device |
摘要 |
In a method of forming a protruded shaft on a metal base for an electronic memory device, the metal base is pressed down with a pressing tool from upper face side of the metal base placed on a die. The die is provided with a hole having a predetermined inner diameter and the wall material of the metal base is moved into the hole of the die to form a protruded shaft having a hollow part inside and the tip end closed. |
申请公布号 |
US6915676(B2) |
申请公布日期 |
2005.07.12 |
申请号 |
US20020314493 |
申请日期 |
2002.12.09 |
申请人 |
NAKAMURA SEISAKUSHO KABUSHIKIGAISHA |
发明人 |
MIYAHARA HIDEYUKI |
分类号 |
B21D22/02;B21D22/04;B21D22/26;B21D53/00;B21J5/06;G11B25/04;G11B33/02;(IPC1-7):B21C37/02 |
主分类号 |
B21D22/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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