发明申请
- 专利标题: Folded-seam connection, method of producing it and device
- 专利标题(中): 折缝连接,生产方法及装置
-
申请号: US11546140申请日: 2006-10-11
-
公开(公告)号: US20070039162A1公开(公告)日: 2007-02-22
- 发明人: Rudolf Binggeli
- 申请人: Rudolf Binggeli
- 主分类号: B21D39/00
- IPC分类号: B21D39/00
摘要:
In ventilation and air-conditioning technology, so-called spiral pipes have to be joined together in a tightly sealed manner at widely differing angles, which is generally carried out by segment bends and pipe sections. An improved, durable seal of folded-seam connections is achieved by a flange-like double fold which is arranged at a first pipe end and which is surrounded on the outside at least in part with positive locking and with a continuous metal seal, by a second double fold at the second pipe end.