Provided is a steel cord for reinforcing rubber articles, which can prevent a reduction in the strength of the steel cord caused by twisting steel filaments, and a tire and a crawler using the steel cord. Provided is a steel cord 1 for reinforcing rubber articles formed by twisting a plurality of sheath strands 3 are twisted around a core strand 2, and the core strand 2 comprises: a core composed of two core filaments 2a aligned in parallel without being twisted; and at least one sheath composed of a plurality of sheath filaments 2b twisted around the core, and a diameter dc of the core filament 2a and a diameter ds of the sheath filament 2b satisfy the following expression (1):

dc<ds (1)

and the tensile strength T (MPa) of the core filament 2a satisfies the relationship represented by the following expression (2):

T<365017000(dc0.15).sup.2 (2).

A steel cord for rubber reinforcement comprises a first group of core filaments (105) having a number of m and a second group of sheath filaments (110) having a number of n, m is three or four, the core filaments (105) are forming a helix, the core filaments (105) are not twisted together and being substantially parallel or the core filaments (105) have a twist pitch being more than 300 mm; the second group and the first group are twisted with each other, and the sheath filaments (110) are forming a flattened helix in the same direction of the helix of the core filaments (105), and the sheath filaments (110) have a cord twist pitch, at any cross-section of the steel cord, at least one interstice between two adjacent core filaments (105) is present. The steel cord has improved abrasion resistance and can contribute to the reduction of the weight of the tire.

Methods and systems for ropes used to catch livestock such as a cattle roping lariat. In one embodiment, the lariat includes a set of strands, each strand including a set of yarns surrounding a central core. The set of strands are twisted to form a twisted rope. The lariat is manufactured using a set of components including a head box, a tree-cross box with a branched strand tree device and a cross device, and a tail box.

Provided is an elastomer reinforcement cord with improved rust resistance. An elastomer reinforcement cord 10 includes metal filaments and a polymer material. The elastomer reinforcement cord 10 has a multi-strand structure which includes: at least one core strand 21 formed by twisting plural metal filaments 1a and 1b together; and two or more sheath strands 22 each formed by twisting plural metal filaments 11a and 11b together, the sheath strands being twisted together around the core strand. An intra-sheath-strand filling rate a, which is a ratio of the area of the polymer material with respect to an intra-sheath-strand gap region A, is 52% or higher, and an inter-strand filling rate b, which is a ratio of the area of the polymer material with respect to an inter-strand gap region B, is 75% or higher.

Draw tape for cables including an elongated flexible element made of a helical multifilament rope composed of three filaments or strands helically wound about a common longitudinal axis. According to an additional feature, the rope is hammered. Still according to an improvement, the rope is externally covered by a jacket.

Methods and systems for ropes used to catch livestock such as a cattle roping lariat. In one embodiment, the lariat includes a set of strands, each strand including a set of yarns surrounding a central core. The set of strands are twisted to form a twisted rope. The lariat is manufactured using a set of components including a head box, a tree-cross box with a branched strand tree device and a cross device, and a tail box.

The invention is directed to a jacketed mooring rope (1) comprising a core rope (2) and a jacket (3) surrounding said core rope, wherein the jacket comprises a braided layer of level 2 braided strands (30) and wherein said level 2 braided strands each comprise a plurality of level 1 braided strands (40). In another aspect, the invention is directed to a rope (30) for use in the jacket (3) of the jacketed mooring rope (1), wherein said rope (30) comprises a plurality of level 1 braided strands (40) that each comprise a plurality of braided yarns (50) surrounding one or more core yarns (51), wherein the braided yarns and the core yarns comprise fibers having a yarn count of at least 440 den; a tenacity of at least 5 g/den; and/or a modulus of at least 100 g/den.

In an elevator rope, an inner layer rope includes: a plurality of steel inner layer strands; and a resin inner layer rope coating body that is coated onto an outer circumference. A plurality of outer layer strands are twisted together on an outer circumference of the inner layer rope. The outer layer strands each include: an outer layer strand fiber core; and a plurality of steel wires that are twisted together on an outer circumference of the outer layer strand fiber core.

Methods and systems for ropes used to catch livestock such as a cattle roping lariat. In one embodiment, the lariat includes a set of strands, each strand including a set of yarns surrounding a central core. The set of strands are twisted to form a twisted rope. The lariat is manufactured using a set of components including a head box, a tree-cross box with a branched strand tree device and a cross device, and a tail box.

A hybrid rope (40) or a hybrid strand (50) comprising a core element (42, 52), a first (44, 54) and a second (46, 56) metallic closed layer surrounding said core element (42, 52). The core element (42, 52) includes a bundle of synthetic yarns. The first metallic closed layer (44, 54) includes a plurality of first strands of wires helically twisted together with the core element (42, 52) in a first direction. The second metallic closed layer (46, 56) includes a plurality of second wires or strands helically twisted together with said core element (42, 52) and said first metallic closed layer (44, 54) in a second direction. The cross-sectional area of the core element (42, 52) is larger than the total cross-sectional area of the first (44, 54) and second (46, 56) metallic closed layers. A corresponding method of producing such a hybrid rope or hybrid strand is also disclosed.