| 摘要 |
A machine and method for manufacturing uniform impedance communication cables for high frequency use including a series of staggered double twisting units (14a-14d) each of which supports two reels (16a, 16b) wound with single wire elements, and a constant tension tape dispenser (16c) is disclosed. The wire elements from the reels as well as the tape from the dispenser are simultaneously unwound and guided to the ends of the rotating bows (66) of the twisting units at which points the individual wire elements (86a, 86b) are twisted about each other and the tape (T) is applied to the twisted wire pair to fix and maintain the spatial integrity of the twisted wires relative to each other. Each twisting unit is rotated at slightly different speeds to assure different lay lengths for each twisted pair. The assembled cable is then either taped or covered by an extruded sheath.
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