Pre-twist group twinner and method of manufacturing communicatio

Details Pre-twist group twinner and method of manufacturing communicatio Pre-twist group twinner and method of manufacturing communicatio

1998-02-11

1999-10-19

Stryjewski, William

Textiles: spinning, twisting, and twining

Apparatus and processes

Unitary multiple twist devices

57 5852, 57 587, 57 5872, 57 5876, D01H 100

Patent

active

059669179

ABSTRACT:
An apparatus is disclosed for manufacturing communication cables with improved, more uniform impedance characteristics at signal frequencies up to and above 600 MHz. The apparatus includes an "inside-out" rigid twisting machine and at least two bobbins supported within each such machine. Each rigid twisting machine includes a drive for spinning each of the bobbins about their respective axes, and fly-off arrangement is provided for flying off an insulated conductor wire wound on each of the bobbins with substantially no tension in the wire when the bobbin attains a first rotational speed. Guides are provided for guiding the wires from each of the bobbins to a closing point where the wires are closed. A double twist bow arrangement is provided which includes second drive for twisting the closed wires at a second rotational speed to form a twinned cable. Controls are provided for adjusting the first and second rotational speeds to apply a pre-twist to each of the wires about their individual neutral axes prior to twinning, after which a take-up is provided for taking up the twin cable. A bank or line of rigid twisting machines are preferably used to produce two or more twinned cables, which all can then be twinned or twisted about each other to form a multi-cable assembly.

REFERENCES:
patent: 3238711 (1966-03-01), Lundgren
patent: 3475892 (1969-11-01), Taira et al.
patent: 4485614 (1984-12-01), Lindgren
patent: 5400579 (1995-03-01), Thompson
patent: 5564268 (1996-10-01), Thompson
patent: 5622039 (1997-04-01), Thompson

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