Flexible tube, manufacturing method and apparatus

• Main Author: McMillen Paul
• Format: Patent
• Language: English
• Published: 13.09.2016
• Subjects: AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL; BASIC ELECTRIC ELEMENTS; BLASTING; CABLES; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CONDUCTORS; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INSULATORS; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PIPES; PRINTED CIRCUITS; PUNCHING METAL; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS

Apparatus for use with two or more supplies of strip metal comprises, for each supply, a strip feeder and a bending head, the feeder being adapted to receive metal from said each supply and deliver same to the head which is adapted to receive and curl metal from the feeder to produce a strip part encircling a central axis in a coiling manner. The heads and feeders are adapted such that the part axes are coincident and the parts are axially offset from one another, with axially adjacent parts being positioned relative to one another throughout their lengths to define a metal strip which encircles the coincident axes in a coiling manner, the metal strip defining a tubular arrangement which can be used at least for armor cable. The parts can have cross sections such that they interlock throughout their lengths and the strip interlocks with itself throughout its length.