| 发明名称 |
METHOD AND APPARATUS FOR MAKING STEPPED RIMS |
| 摘要 |
A method and apparatus for manufacturing a stepped rim from a cylindrical ring is provided. The ring is bent outwardly at one end to form a clinch and the opposite end of the ring is indented to form a locking ring groove.
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| 申请公布号 |
US3779060(A) |
申请公布日期 |
1973.12.18 |
| 申请号 |
USD3779060 |
申请日期 |
1971.09.16 |
| 申请人 |
LEIFELD & CO,DT |
发明人 |
SCHRODER P,DT |
| 分类号 |
B21D53/30;(IPC1-7):B21D22/18 |
主分类号 |
B21D53/30 |
| 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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