Textiles: spinning – twisting – and twining – Apparatus and processes – Unitary multiple twist devices
Patent
1994-04-07
1996-01-30
Stryjewski, William
Textiles: spinning, twisting, and twining
Apparatus and processes
Unitary multiple twist devices
57 10N, 57 9, 57 67, 57311, 57335, D01H 786, D01H 1326
Patent
active
054872626
ABSTRACT:
A steel cord, having steel filaments twisted so as to have a final twist pitch, is manufactured by plastically deforming the steel filaments by overtwisting the steel cord to a twist pitch which is smaller than the final twist pitch, untwisting the steel cord to the final twist pitch, further untwisting the steel cord to a twist pitch which is greater than the final twist pitch, and twisting the steel cord again to the final twist pitch. The first two steps (i.e., overtwisting and untwisting) are done under a first tension and the third and fourth steps (i.e., further untwisting and twisting) are done under a second tension which is lower than half of the first tension.
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patent: 2143417 (1939-01-01), Johannessen et al.
patent: 2546977 (1951-04-01), Clary et al.
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patent: 4299082 (1981-11-01), Tarantola
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patent: 4397141 (1983-08-01), Gurecki et al.
De Waegenaere Johan
Sabbe Luc
Van Giel Frans
N.V. Bekaert S.A.
Stryjewski William
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