Accession Number : AD0698607

Title :   ELECTRICALLY WELDED THIN ALUMINUM ENVELOPES AND THEIR USE IN COMMUNICATIONS CABLE DESIGNS,

Corporate Author : KABEL- UND METALLWERKE GUTEHOFFNUNGSHUETTE A G HANOVER (WEST GERMANY)

Personal Author(s) : Scheffler,Ernst ; Stein,Dimitri R. ; Wanser,Gerhard ; Ziemek,Gerhard

Report Date : 1969

Pagination or Media Count : 11

Abstract : The paper deals with the kabelmetal 'Weldfoil' process, a process for welding aluminum strip of a thickness less than 0.25 mm (0.010 in.) on cable core diameters up to 75 mm (3 in.). Welded aluminium envelopes made by this process can be used as vapour impervious shields for many types of telecommunication cables. On a 'UNIWEMA' welding machine a strip is formed around the core so that the side portions are radially extended. By trimming both side portions in one cut they are aligned and give a tab of requisite height. Across the oxide-free edges of the tab a crown is welded along the length of the envelope so formed. The tab is then folded down. A copolymer layer and a conventional polyethylene jacket are extruded over the tab-welded envelope. Such a sheath is completely vapour impervious and has the required mechanical characteristics. The full circumferential conductivity provided by the welded envelope imparts excellent shielding properties. Test data are given and examples of several cable designs are discussed. (Author)

Descriptors :   (*TRANSMISSION LINES, ALUMINUM COATINGS), (*ALUMINUM COATINGS, *WELDING), ELECTRIC CABLES, SHIELDING, PLASTIC COATINGS, POLYETHYLENE PLASTICS, JOINTS, WEST GERMANY

Subject Categories : Electrical and Electronic Equipment
      Coatings, Colorants and Finishes
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE