H - Electricity – 01 – B
Patent
H - Electricity
01
B
H01B 13/16 (2006.01) H01B 7/36 (2006.01) H01B 11/00 (2006.01) H01B 11/02 (2006.01) H01B 13/02 (2006.01) H01B 13/34 (2006.01)
Patent
CA 2071407
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.
Bleich Larry Lynn
Nutt Wendell Glenn
Zerbs Stephen Taylor
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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