Alcatel

Nexans

Hans-Joachim Arntz

Friedrich Harten

Michael Meyer

Harry Staschewski

Klaus Porcher

In a process for producing a metal tube, in which a strip of copper alloy is continuously pulled from a strip supply and is formed into a slit tube with butted strip edges, and the strip edges are laser welded, and at least the area of the strip edges is mechanically roughened prior to welding. The peak-to-valley height is above R &equals;12.5 &mgr;m, and wetting with a liquid hydrocarbon is carried out prior to welding.

Process for producing a metal tube of copper

In an apparatus for manufacturing an optical fiber cable that includes a metal tube (,) in which at least one optical fiber (,) is arranged in a viscous plastic mass, which apparatus includes a device continuously forming a metal strip (,) into a slit tube, a welding device (,), and a charging tool with at least one tube (,) whose one end projects into the slit tube (,), whereby the tube introduces the optical fibers (,) into the metal tube (,), the one tube (,) has an indentation (,) on its surface facing the welding device (,), which is covered toward the top and thus forms a channel (,), and a coolant gas or protective gas is directed through this channel (,).

Growing community of inventors

Langenhagen, Germany

Hans-Joachim Arntz