Machine for punching out butterfly clips for fastening to a fram

Details Machine for punching out butterfly clips for fastening to a fram Machine for punching out butterfly clips for fastening to a fram

1990-03-23

1991-08-27

Bishop, Steven C.

Metal working

Plural diverse manufacturing apparatus including means for...

Binding or covering and cutting

29 33S, 29 34R, 292835, 295661, 29788, 140 3CA, 140 93D, B21F 2700, B23P 1100

Patent

active

050421247

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.

REFERENCES:
patent: 2537817 (1951-01-01), Edwards
patent: 2738747 (1956-03-01), Derrick

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