Fibre yarn and rope production

Details Fibre yarn and rope production Fibre yarn and rope production

2005-09-20

2005-09-20

Calvert, John J. (Department: 3765)

Textiles: spinning, twisting, and twining

Apparatus and processes

Covering or wrapping

C057S006000, C057S204000, C057S210000, C057S293000

Reexamination Certificate

active

06945026

ABSTRACT:
An unspun yarn including a longitudinal main rope body formed from a least one fibre assembly of substantially untwisted and parallel fibres, and a least one reinforcing thread helically wound around the rope body and extending therealong in a single longitudinal direction. The direction in which the reinforcing thread is wound around the rope is reversed at predetermined intervals. A method of forming an unspun yarn, including providing a fibre assembly of substantially untwisted and parallel fibres and reinforcing thread, forming a longitudinal main rope body; intermittently imparting opposing twists to alternate sections of the rope body while drawing the reinforcing thread longitudinally into surface contact with a twisted section of the rope body, allowing the twisted section to engage the adjacent section of the reinforcing thread, releasing the opposing twists of the rope body causing the engaged reinforcing thread to wrap the rope body.

REFERENCES:
patent: 3078654 (1963-02-01), Marshall
patent: 3565127 (1971-02-01), Doyle et al.
patent: 3577873 (1971-05-01), Waters
patent: 4309869 (1982-01-01), Boyce
patent: 4866924 (1989-09-01), Stahlecker
patent: 6035668 (2000-03-01), Akopian

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