The piston (1) has a cavity (2) and two hollow piston parts (3a, 3b) limiting the cavity. The hollow piston parts are welded with one another at a welding seam (4), where the hollow piston parts comprise a groove (20) in the inside in the proximity of the welding seam. The ...
A method for resistance - point - or lines - seam welding of a radiator - elements with one anotherANDERSEN ERNST CHRISTIAN VESTERGAARDKJAEFSGAARD HANS HENNINGSCHMIDT AXEL EDSBERG
Hand device for electric point - or seam welding with two electrodes disposed next to one another on a handleBECKER EMILBECKER JOHN E.
Device for resistance - rollers - seam welding to one another, for example, the following overlapped band endsPEARSON ROY W
A method for preparing the narrow surfaces of a strip, which leads to a press another feature of the welding seam tube ends of screws is processedWELGE ADOLFSEULEN DR.-ING. GERHARD
method for welding a between two opposite one another, an elongated metal applied to seamC. RUDD,WALLACEJ. STANTON,ROBERT