发明名称 |
Method of making a butt joint for duct parts, device for carrying out the method, and air duct consisting of bent angular sheet metal panels |
摘要 |
To make a butt joint for duct parts, the corners of the duct are jogged at the duct ends and the duct side strips remaining between the jogs are bent off outwards as a flange profile by means of a rolling tool.
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申请公布号 |
DE3331304(A1) |
申请公布日期 |
1985.03.14 |
申请号 |
DE19833331304 |
申请日期 |
1983.08.31 |
申请人 |
PAULI,LOTHAR |
发明人 |
PAULI,LOTHAR |
分类号 |
B21D39/02;F16L23/14;(IPC1-7):B21D39/02 |
主分类号 |
B21D39/02 |
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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