Multi-strand steel cord having a core and peripheral strands sur

Details Multi-strand steel cord having a core and peripheral strands sur Multi-strand steel cord having a core and peripheral strands sur

1993-12-02

1995-10-31

Stodola, Daniel P.

Textiles: spinning, twisting, and twining

Strand structure

Covered or wrapped

57214, 57218, 57902, D02G 336, B60C 900

Patent

active

054618509

ABSTRACT:
A steel cord (10) has a diameter D and includes a core strand (12) and up to nine peripheral strands (14) surrounding the core strand. The core strand (12) has a diameter D1 and the peripheral strands (14) have a diameter D2. The ratio core strand diameter to peripheral strand diameter D1/D2 is greater than a predetermined value in order to enable rubber penetration. Each strand has a center of one or more center filaments (16, 22) and two or more layers of filaments (18, 20, 24, 26) surrounding the center. The twist angle of a radially outer layer is smaller than the twist angle of a radially inner layer of the same strand. A first free space (28) ranging from 0.0015.times.D to 0.0075.times.D is provided in at least the core strand between each pair of filaments (18) of the radially most inner layer.

REFERENCES:
patent: 2567300 (1951-09-01), Riddle
patent: 2792868 (1957-05-01), Benson
patent: 3240570 (1966-03-01), Grimes et al.
patent: 3413799 (1968-12-01), LeJeune
patent: 3555789 (1969-02-01), Terragna
patent: 3922841 (1975-12-01), Katsumata et al.
patent: 4498282 (1985-02-01), Graetz
patent: 4947636 (1990-08-01), Sinopoli
patent: 4947638 (1990-08-01), Nagamine et al.
"Belt Cord Construction", Research Disclosure, No. 297, pp. 7-9, 29712, Emsworth, GB, Jan. 1989.
"Steel Cords of the 1+6+12-type", Research Disclosure, No. 343, pp. 857-859, 34370, Elmsworth, GB, Nov., 1992.

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