Method of forming fixing heads on tension springs and...

Details Method of forming fixing heads on tension springs and... Method of forming fixing heads on tension springs and...

B - Operations, Transporting

21

F

18/123, 140/13

B21F 3/12 (2006.01) B21F 35/02 (2006.01) B29C 45/14 (2006.01) F16F 1/12 (2006.01)

Patent

CA 1135465

ABSTRACT. A method of forming fixing heads on both ends of tension springs which are made from coiled spring wire and which are used in particular for precision appa- ratus. A continuous coil of spring wire is expanded at the area of the ends to be formed. The expansion zone extends over at least two turns. The expanded turns arc provided with an envelope of a synthetic material by moulding.

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