Method of making low crosstalk ribbon cable

Details Method of making low crosstalk ribbon cable Method of making low crosstalk ribbon cable

1981-03-23

1983-11-08

Petrakes, John

Textiles: spinning, twisting, and twining

Apparatus and processes

Alternate twist

57204, 57294, 57297, 156 55, 156178, 156436, 174 34, 174117F, H01B 1304, H01B 1306

Patent

active

044134690

ABSTRACT:
Several embodiments of reduced crosstalk ribbon cable having alternating twisted and straight sections of indefinite length are disclosed, crosstalk being reduced by differing starting positions of alternate twisted pairs, differing lay of alternate twisted pairs, and variation in lay along the length of alternate twisted pairs. A preferred embodiment uses offset starting positions, and a lay in alternate twisted pairs substantially longer than that of adjacent pairs, becoming shorter to minimize the nontwisted portion resulting from the time to bring adjacent pairs into planar alignment. An apparatus for making such cable is also disclosed, having several wire supply twisters and several second twisters, removing the twist inserted by the wire supply twisters while forming twisted pair ribbon cable sections, allowing indefinitely long twisted sections. Twisters are provided in two groups operating in opposite directions, preventing curl of the cable. The paired conductors are maintained in precisely laterally spaced relationship by heat bonding to thermoplastic film.

REFERENCES:
patent: 3306023 (1967-02-01), Henshaw et al.
patent: 3468120 (1969-09-01), Hildebrand
patent: 3545194 (1970-12-01), Fish et al.
patent: 3855777 (1974-12-01), Durkee et al.
patent: 4034148 (1977-07-01), Lang
patent: 4096006 (1978-06-01), Paquin
patent: 4202722 (1980-05-01), Paquin

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