Machine for punching out butterfly clips for fastening to a frame of a spring core
US5042124A · kind A · utility
3Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 23, 1990 |
| Grant date | Aug 27, 1991 |
| Priority date | — |
| Expiry date | Mar 23, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53996
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A machine in which butterfly clips are prebent and then punched out of steel strip and simultaneously finally bent, such that they fasten together a spring and the frame of a spring core. Thus, both the punching out of the clip and the final bending process, i.e. the connecting process between the frame and spring parts, are carried out in a single tool. The machine therefore operates particularly cost-effectively, because, in comparison with the prior art, the separately punched butterfly clips do not have to be inserted into a separate bending machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.