A three-dimensional measurement method of geometric parameters of a rope or a cable provides for obtaining a three-dimensional representation of a plurality of 3D contour points of the rope or cable and calculating the geometric parameters thereof, such as diameter, roundness and axis. A calibrated three-dimensional optical measurement system for measuring geometric parameters includes a plurality of digital image acquisition devices and a digital image processing device configured to perform the steps of the three-dimensional measurement method.

A facility for manufacturing at least first and second assemblies of M1 filamentary elements and M2 filamentary elements, in which each of the first and second assemblies includes a plurality of filamentary elements wound together in a helix, includes an assembling apparatus and a splitting apparatus. The assembling apparatus of the facility assembles M filamentary elements together into a layer of M filamentary elements around a temporary core, to form a temporary assembly. The splitting apparatus of the facility splits the temporary assembly into at least the first and second assemblies of M1 filamentary elements and M2 filamentary elements.

The method for producing a wire element by interlacing at least a first strand and a second strand, during which strand tension control is effected by includes defining an assembly tension set point representative of a state of longitudinal tension to be obtained in the first strand when said first strand reaches the assembly point. The method also includes measuring the actual assembly tension applied in the first strand, said measurement being taken at a first tension measurement point located along the first strand and upstream of the assembly point. The method proceeds with operating a tension regulating member such as a capstan, which acts on the first strand upstream of the assembly point such as to cause the actual assembly tension within said first strand to converge automatically towards the assembly tension set point.

A process and a splitter for splitting a tape of a uniaxially oriented material. The tape is passed in a process direction over a static splitting profile having a row of teeth, e.g., with a cutting edge extending in the process direction. The tape is split to form a material comprising a plurality of parallel strips interconnected by fibrils. The split material can for example be used for the production of high tensile ropes or laminates.

A three-dimensional measurement method of geometric parameters of a rope or a cable provides for obtaining a three-dimensional representation of a plurality of 3D contour points of the rope or cable and calculating the geometric parameters thereof, such as diameter, roundness and axis. A calibrated three-dimensional optical measurement system for measuring geometric parameters includes a plurality of digital image acquisition devices and a digital image processing device configured to perform the steps of the three-dimensional measurement method.

A multi-strand cord (50) having a 1×N structure comprises a single layer (52) of N strands (54) wound in a helix about a main axis (A), each strand (54) having one layer (56) of metal filaments (F1) and comprising M>1 metal filaments wound in a helix about an axis (B). The cord (50) has a total elongation Δt>8.10% and the energy-at-break indicator Er of the cord (50), defined by Er=∫.sub.0.sup.Atσ(Ai)×dAi where σ(Ai) is the tensile stress in MPa measured at the elongation Ai and dAi is the elongation such that Er is strictly greater than 52 MJ/m.sup.3.

A method for producing a synthetic tensile member having a precisely known and stable length. The invention also comprises equipment configured to carry out the method. A tensile member is prepared by attaching terminations to an assembly of synthetic filaments. The tensile member is then attached to a loading apparatus that subjects the tensile member to a pre-defined loading process. The tensile member is thereby conditioned to a stable length. The length is then measured and a length adjusting component is incorporated into the tensile member to create a precise and stabilized length that is configured for the tensile member's particular application.

A cord (50) comprises a single layer (52) made up of N helically wound metal filamentary elements (54) having an outer diameter D, the metal filamentary elements (54) defining an internal enclosure (58) of the cord of diameter Dv. Each metal filamentary element (54) has a diameter Df and a helix radius of curvature Rf. With this cord (50), D, Dv, Df and Rf being expressed in millimeters: 0.10≤Jr≤0.25, 9≤Rf/Df≤30, and 1.60≤Dv/Df≤3.20, where Jr=N/(π*(D−Df))×(Dh×Sin(π/N)−(Df/Cos(αx π/180))) and α is the helix angle, expressed in degrees, of each metal filamentary element (54).

A cord (50) comprises a single layer (52) made up of N helically wound metal filamentary elements (54) having an outer diameter D, the metal filamentary elements (54) defining an internal enclosure (58) of the cord of diameter Dv. Each metal filamentary element (54) has a diameter Df and a helix radius of curvature Rf. With this cord (50), D, Dv, Df and Rf being expressed in millimeters: 0.10≤Jr≤0.25, 9≤Rf/Df≤30, and 1.60≤Dv/Df≤3.20, where Jr=N/(π*(D−Df))×(Dh×Sin(π/N)−(Df/Cos(αx π/180))) and α is the helix angle, expressed in degrees, of each metal filamentary element (54).

The invention relates to a method for operating a braiding, winding or spiraling machine for braiding around, wrapping around or spiraling around a strand-like material, in particular a cable, with at least one elongate material strand formed from at least one elongate material fibre, in particular from at least one wire. In the method, a diameter of the strand-like material is measured and a feed rate of the strand-like material and/or a rotational speed at which the at least one elongate material strand moves about the longitudinal axis of the strand-like material is controlled by open-loop or closed-loop control depending on said diameter measured. A predefined degree of coverage of the strand-like material by the at least one elongate material strand can be kept substantially constant by means of an open-loop or closed-loop control of the relative feed rate of the strand-like material depending on the diameter measured.