Abstract: The present invention relates to a method and apparatus for continuous manufacture of a fiber-optic cable. According to the method, single optical fibers of certain length are formed into a fiber-optic cable enclosed by a secondary sheath. Further, a certain length of the optical fibers is accumulated into an active buffer, and the end of an exhausting fiber is connected by a splice to the end of a new fiber, while the fiber is being fed into the process during the splicing operation from the buffer.

Abstract: A multi-layer reinforced and stabilized cable construction comprising a core portion (1, 11) and a non-metallic sheathing portion having barrier and protective layers and two or more outer reinforcement layers. In order for the mechanical and barrier properties of the cable to be controlled, the barrier and protective layers and/or the reinforcement layers (12, 13) are oriented in a controlled manner at different angles by fibrous reinforcements or lamellar barriers.

Abstract: The invention relates to a coaxial high-frequency cable including an inner conductor, a dielectric material formed about the inner conductor, and an outer conductor formed about the dielectric material. According to the invention, the dielectric material is made from an expanded polymer blend compounded from two a-olefin polymers of different densities, whereby the polymer of the higher density forms the matrix of the polymer blend.

Abstract: The invention relates to an optical cable comprising a reinforcing structure (1) for providing sufficient tensile and compression strength for the cable, and one or more longitudinally extending fibre channels (4) in which optical fibres in the form of single fibres (2), fibre bundles or fibre ribbons are positioned. In the cable of the invention, the fibre channel/fibre channels (4) is/are defined directly by said reinforcing structure (1), and the reinforcing structure is made of plastic reinforced with fibre bits (3).

Abstract: A method and apparatus for equalizing the tension of optical fibers to a predetermined value, in which optical fibers (3) are passed from starting reels (1) through an equalizer wheel structure (4) to the next stage of the process. The equalizer wheel structure (4) is formed by two wheels (5, 6) on which the fibers (3) travel in succession. The first wheel (5) is adapted to supply fiber to the second wheel (6) at a greater rate than that which passes on the second wheel and is supplied to the next stage.

Abstract: A method and arrangement for producing a basic element of a multi-element fibre optic cable having a coating tool (6) for forming a tubular sheathing around a single optical fibre (3) or a fibre bundle formed of several optical fibres (3), and a pulling device (8) placed after the coating tool (6) for pulling the sheathing and the fibres forward as a unit. In order to produce a stable product, the tension (t.sub.3) of the fibres (3) passed to the coating tool (6) is kept continuously at a controlled level. The direction of travel of the fibres and the sheathing is kept straight before and at the pulling device (8), and the pulling device (8) is spaced from the coating tool (6) at a distance depending on the production rate of the production line, so that desired sliding of the fibres (30 inside the sheathing is provided at the pulling device (8).