WELDING POSITIONING DEVICES

Brand	Owner	Address	Description
LIQUID AIR INC.	LIQUID AIR INC.	1 EMBARCADERO CENTER SAN FRANCISCO CA 94111	WELDING POSITIONING DEVICES, ELECTRODES, PRESSURE REGULATORS AND GAUGES;GAS PRODUCTION PLANTS, GAS COMPRESSORS, WELDING MACHINES, OXY-CUTTING MACHINES, ELECTRODE HOLDERS, CUTTING AND WORKING MACHINES, LIQUIFIED GAS PUMPS AND TURBINES;BOTTLES AND CONTAINERS FOR STORING GASES UNDER PRESSURE AT LOW TEMPERATURES;GASES FOR MEDICAL PURPOSES SUCH AS PURE OXYGEN AND COMPRESSED AIR;ACETYLENE AND CONTAINERIZED GAS FOR FUEL PURPOSES;INDUSTRIAL GASES, INCLUDING OXYGEN, NITROGEN, ARGON, NITROUS OXIDE, HELIUM, CARBON DIOXIDE, HYDROGEN, KRYPTON AND XENON;CRYOGENIC APPARATUS AND PARTS THEREOF;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A process for the continuous production of longitudinally welded metal tubes where a metal strip (1) is drawn from a strip supply and gradually shaped into a slit tube in a shaping station (2). The slit tube is welded in a welding system (4) along the edges of the strip, and the welded tube (6) is extracted by an extraction device (5). The welding system (4) is a protective gas arc welding system with several electrodes supplied by separate sources (4c, 4d) of welding current. The electrodes are arranged in succession, in the direction of production. The welding system (4) has two welding devices (4a, 4b), whose electrode tips are directed at a common welding point. Only one of the welding devices (4a, 4b) is in operation at any given time, while the other welding device is in a standby position. When an electrode change becomes necessary, the arc of the welding device in the standby position is first struck by means of an auxiliary arc. The welding current intensity of the welding device presently in operation is then reduced, while the welding current intensity of the welding device in the standby position is simultaneously increased.