Textiles: spinning – twisting – and twining – Strand structure – Covered or wrapped
Patent
1978-07-05
1980-01-08
Watkins, Donald
Textiles: spinning, twisting, and twining
Strand structure
Covered or wrapped
57311, 433 20, D07B 100, D02G 312, D02G 344, A61C 700
Patent
active
041821068
ABSTRACT:
A wire construction is provided in which five fine filaments of stainless steel wire are helically overwound about a center filament, also formed of stainless steel. The diameter of the central filament is slightly larger than the diameter of the helically wound filaments, which are of uniform diameter. The wire so constructed retains a high degree of elasticity following manufacture, and is especially suitable for application as an orthodontic wire for use in bracework for straightening teeth, especially the teeth of adolescent children. The wire is formed on a multi-bobbin tubular strander, and during manufacture all of the wire strands are maintained under tension, although the center strand is maintained under greater tension than the helically overwound filaments.
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patent: 3052081 (1962-09-01), Wallshein
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patent: 3878609 (1975-04-01), Wallshein
patent: 3902307 (1975-09-01), Schoerner
patent: 3997970 (1976-12-01), Hodgson
patent: 4086702 (1978-05-01), Wallshein
Cablestrand
Watkins Donald
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