F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
F16B 37/12 (2006.01) B21F 3/02 (2006.01) B21F 3/12 (2006.01) B21K 1/56 (2006.01)
Patent
CA 2295256
The present invention provides a wire for a helical coil insert which permits, when used in the manufacture of a helical coil insert, continuous manufacture with very high efficiency, thus there is a remarkable improvement of productivity of the helical coil inserts. The wire of the invention has coil free end forming sections 2 formed at prescribed intervals of length in the axial direction of the wire 1. The coil free end forming sections 2 have a first and a second convergent sections 4 and 5 and recesses 6 and 7 formed adjacently to the first and the second convergent sections 4 and 5.
Marks & Clerk
Nippon Sprew Co. Ltd.
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