发明名称 |
Hole punching device for hollow articles |
摘要 |
Device for the punching of holes into the walls of hollow objects, particularly long lengths of tube, consisting of a framework into which the hollow material is fed sideways and pressed against one of its inner walls by springs, and a die which fits loosely into the inside of the hollow material such as to be able to move sideways and is held by a rod of still smaller area of cross section which is held in position from outside the end of the hollow object from which it protrudes.
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申请公布号 |
DE1808050(A1) |
申请公布日期 |
1970.05.27 |
申请号 |
DE19681808050 |
申请日期 |
1968.11.09 |
申请人 |
OSTHOFF,DIPL.-WIRTSCH.LEOPOLD |
发明人 |
OSTHOFF,DIPL.-WIRTSCH.LEOPOLD |
分类号 |
B21D28/28 |
主分类号 |
B21D28/28 |
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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