Rubber product-reinforcing metallic cord and method for manufacturing such a cord
AssigneesSumitomo (SEI) Steel Wire Corp., Sumitomo Electric Tochigi Co., Ltd.
InventorsKenichi Okamoto, Yasuo Sakai, Kazuhiko Saito
Life of this patent
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Abstract
A rubber product-reinforcing metallic cord is provided which comprises three to five metallic filaments, which shows a high degree of penetration of rubber without reducing compressive rigidity, and which can be manufactured at low facility and production costs. A rubber product-reinforcing metallic cord 7 is formed by twisting together a pre-strand 6 comprising a first metallic filament 1 and a second metallic filament 2 helically wrapped around the first filament 1, and a fifth metallic filament 3 (or 5) with a twist pitch P. The metallic cord 7 may be formed by twisting together two of such pre-strands, or by twisting together two of such pre-strands and the fifth metallic filament.
Claims16
A rubber product-reinforcing metallic cord comprising a first pre-strand comprising a first metallic filament and a second metallic filament helically wrapped around said first metallic filament, and a fifth metallic filament, said first pre-strand and said fifth metallic filament being twisted together with a twist pitch P wherein said second metallic filament is wrapped around said first metallic filament with a pitch p1 which satisfies, with respect to the twist pitch P of the cord, the relation 0.922≦p1/ P≦0.991.
A rubber product-reinforcing metallic cord comprising a first pre-strand comprising a first metallic filament and a second metallic filament helically wrapped around said first metallic filament, and a second pre-strand comprising a third metallic filament and a fourth metallic filament helically wrapped around said third metallic filament, said first and second pre-strands being twisted together with a pitch P wherein at least one of said second and fourth metallic filaments is wrapped around the corresponding one of said first and third metallic filaments with a pitch p1 which satisfies, with respect to the twist pitch P of the cord, the relation 0.922≦p1 /P≦0.991.
A rubber product-reinforcing metallic cord comprising a first pre-strand comprising a first metallic filament and a second metallic filament helically wrapped around said first metallic filament, a second pre-strand comprising a third metallic filament and a fourth metallic filament helically wrapped around said third metallic filament, and a fifth metallic filament, said first and second pre-strands and said fifth metallic filament being twisted together with a pitch P wherein at least one of said second and fourth metallic filaments is wrapped around the corresponding one of said first and third metallic filaments with a pitch p1 which satisfies, with respect to the twist pitch P of the cord, the relation 0.922≦p1/P≦0.991.
Dependencies are inferred from the claim text.