The present invention relates to a rope assembly (1) consisting of at least one rope (2) that is made of textile fibre material and is folded back to form two substantially parallel rope portions (2, 2), wherein load distribution between the two rope portions is enabled and the rope portions are surrounded by a common sleeve (4). The rope assembly according to the invention is particularly suitable as a winch rope or as a rope for drive pulley drives, e.g., as a lift cable, in Koepe hoists and in capstans.

A steel cord and a manufacturing process are disclosed. The steel cord includes a steel core wire located in the center and having a diameter of d; and M sheath-layer steel wires arranged around the steel core wire in the center, tangent to the steel core wire, and having a diameter of d1, at least two gaps L existing between the M sheath-layer steel wires, where M is 4; d, d1, and L satisfy the following relationship: 0.420<(d/d1)<0.800, d1 is between 0.20 mm and 0.44 mm, and L0.0008 mm. The steel cord of the present invention may allow rubber to be fully penetrated into the gaps, thereby reducing air content in the steel cord, avoiding point contact friction between the layers of steel wires due to insufficient rubber penetration, and further solving the problem of failure of the bearing capacity of the steel cord due to abrasion.

A steel cord for reinforcing a breaker or belt ply in a rubber tire having a core group and a sheath group. The core group consists of two to four core steel filaments with a first diameter dc and the sheath group consists of one to six sheath steel filaments with a second diameter ds. The ratio dc/ds of the first diameter dc to the second diameter ds ranges from 1.10 to 1.70. The two core steel filaments are untwisted or have a twisting step greater than 300 mm. The sheath group is twisted around the core group with a cord twisting step in a cord twisting direction. The ratio of the difference in residual torsions of the core group and the sheath group to the difference in saturation level between the core group and the sheath group ranges from 0.10 to 0.65, preferably from 0.10 to 0.60.

A method of manufacturing an assembled conductor includes: arranging a plurality of peripheral wires having anisotropic cross-sectional shapes around a central wire; bundling the central wire and the peripheral wires that have been arranged, to form a conducting wire bundle; and rolling the conducting wire bundle to form the assembled conductor. The arranging includes a bending process for bending the plurality of peripheral wires in directions along imaginary lines that extend radially relative to an axis of the central wire on an imaginary plane intersecting the axis of the central wire.

In a first embodiment, the invention relates to a stranding machine for wires having two wrap-around rollers having wrap-around tracks arranged on the circumference thereof, whereby the wire can be guided in such a way that the wire runs through the first and second wrap-around tracks preferably in alternation in preferably 8-shaped or 0-shaped wraps. In a second embodiment, the stranding machine has a winding device for winding the wire onto a reel having a laying device that can be moved along a movement axis parallel to the reel axis and having a plurality of rotatably supported deflecting rollers, whereby the wire can be guided in such a way that the wire runs onto and/or from each of the deflecting rollers substantially in the plane of rotation of the deflecting roller. In this way, the produced wire has lower twist and lower torsional stresses, which makes the further processing of the wire, in particular the winding, assembly, crimping, and extrusion of a plastic insulation around the wire easier and which increases the number of possible bending reversal cycles.

The invention relates to a rope made of a textile fibre material for applications in which a diagonal pull may occur, characterized in that the rope is a core/sheath rope the core (1) of which and the sheath of which are composed essentially of a textile fibre material the core (1) of which is stranded and which exhibits a force-fitting winding with a tensile element (2, 2, 2) between the core (1) and the sheath.

A hybrid strand includes a core and outer wires arranged around the core, wherein at least a part of the outer wires is compressed, wherein the compressed outer wires include a flattened cross-sectional shape, the outer wires are composed of steel, and the core is a fiber core. A corresponding production method produces such a hybrid strand.

In a tire the strength of steel cord and the resilience of rubber are a successful combination. However, in some specific areas of a tire, more elongation is expected from the steel cord, while still a sufficient degree of stiffness is expected. A steel cord is presented that has these properties. The steel cord comprises two or more steel elements that are twisted together. The steel elements comprise one or more steel filaments. In total the steel cord comprises N filaments, each with a cross sectional area A. When the steel elements are individualised out of the steel cord they show a helix pitch length of L.sub.o, while a single pitch has a centre line length of S. The inventive steel cord shows a P value of at least 50 newton, wherein P=NE (A/S).sup.2. Further methods are presented to produce this steel cord.

An embodiment of a wellbore cable comprises a cable core, at least a first armor wire layer comprising a plurality of strength members and surrounding the cable core, and at least a second armor wire layer comprising a plurality of strength members surrounding the first armor wire layer, the second armor wire layer covering a predetermined percentage of the circumference of the first armor wire layer to prevent torque imbalance in the cable.

A method for producing a rope, wherein fiber bundles are applied with a liquefied matrix material upstream of and/or at a twisting point to form fiber strands, and are embedded into the liquefied matrix material during stranding, by which fiber strands a fiber core of the rope is formed and wires or wire strands are wound about the fiber core. The matrix material of the fiber strands is hardened after the stranding, and the fiber strands are subsequently stranded directly with one another without further application to form the fiber core. Preferably the fiber strands are heated, during or after the stranding thereof to form the fiber core, so that the matrix material softens at least individual fiber strands, preferably all the fiber strands, another of the fiber strands is connected with the matrix material, and is subsequently hardened, forming an integral bond with one another.