Method of making twisted pairs of insulated metallic conductors

Details Method of making twisted pairs of insulated metallic conductors Method of making twisted pairs of insulated metallic conductors

1992-11-16

1994-05-24

Bell, Mark L.

Coating processes

Electrical product produced

Wire conductor

427178, 427409, 427424, 427425, 174 34, 174112, 174113R, B05D 102, H01B 1100

Patent

active

053147120

ABSTRACT:
Methods and apparatus are provided for providing an electrically matched pair (20) of insulated metallic conductors (21, 21). Insulation is applied to successive portions of a length of wire-like metallic conductor (22) after which a colorant material (37) is applied to the surface of a plastic insulation material of a first portion of the length of the metallic conductor which is being moved along a path of travel. Facilities are provided for shielding a supply of the colorant material from the moving insulated metallic conductor and for then exposing a second portion of the length of the insulated metallic conductor to a different colorant material. The insulation and the colorant materials and their disposition with respect to the insulation are such that the dielectric constant of one insulated metallic conductor of the pair is substantially equal to that of the other. The first and second portions of the length of the insulated metallic conductor are separated from each other and are twisted together to provide an electrically matched pair.

REFERENCES:
patent: 4034148 (1977-07-01), Lang
patent: 4202722 (1980-05-01), Paquin
patent: 4368214 (1983-01-01), Gillette
patent: 4486619 (1984-12-01), Trine et al.
patent: 4647474 (1987-03-01), Masuda et al.
patent: 4877645 (1989-10-01), Bleich et al.
patent: 4891086 (1990-01-01), Austin et al.
patent: 5187329 (1993-02-01), Bleich et al.

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