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| Number | Title | Issue Date |
| 7111770 | Method for producing connecting ends on metal tubes and tube piece comprising such connecting ends Connecting ends on a hose piece comprising several metal layers, in particular a strip wound metal hose piece, are produced by fixing the overlapping metal layers of a hose of larger length or of an endless hose in the region of the point of separation through weldi... | 09/26/2006 |
| 6588648 | Method and device for transferring a hollow-profile blank During manufacture of certain hollow profiles suitable for use in car body construction the welded profiles are subjected to a further deformation process, namely hydroforming. At present the corresponding welding machines are charged manually. The invent... | 07/08/2003 |
| 4830258 | Method and apparatus for producing a container body having a butt welded longitudinal seam from a sheet metal blank To make a container with a butt welded longitudinal seam, the side edges of a preformed blank are guided by straight grooves so that the side edges converge at an acute angle. At the point of convergence the side edges are heated to at least to the forgin... | 05/16/1989 |
| 4733815 | Process for guiding sheets to be butt-welded together and apparatus with means for conveying and guiding sheets or strips to be butt-welded together The invention relates to a process for guiding sheets or strips to be butt-welded together and to an apparatus with means for conveying and guiding sheets or strips to be butt-welded together. The sheets or strips, lying laterally next to one another, eac... | 03/29/1988 |
| 4562326 | Machine for welding automotive wheel rim blanks The longitudinal edge portions of a cylindrical wheel rim blank are gripped by a pair of laterally spaced clamping assemblies each having a radially fixed inside clamping member and each having a radially movable outside clamping member adapted to clamp t... | 12/31/1985 |
| 4508949 | Method and apparatus for welding tapered metal poles Methods and apparatus for manufacturing tapered, hollow metal poles which can be used for manufacturing poles of various lengths, tapers and cross-sectional dimensions with the same apparatus. A substantially complete, tapered tube is formed from a plate ... | 04/02/1985 |
| 4294662 | Process for the final assembly of a nuclear reactor vessel The invention concerns a process for the final assembly of a nuclear reactor vessel comprising two sub-assemblies which are brought together and welded along mating surfaces. At least three female centering stubs, each associated with a seat recessed rela... | 10/13/1981 |
| 4214140 | Resistance welding machine for seam welding of blanks or the like A resistance welding machine for seam welding blanks or bodies or the like, comprising a guide device arranged in front of the electrode rolls for producing an exactly determined overlapping of the edges of the blanks or bodies and for guiding the overlap... | 07/22/1980 |
| 4187406 | Machine for welding seams in automotive wheel rim blanks A welding machine for welding the longitudinal seams in wheel rim blanks which have been rolled into cylinders with the longitudinal edges of each blank forming a longitudinal gap includes a pair of clamping assemblies each having an inside member and an ... | 02/05/1980 |
| 4025749 | Apparatus for making butt-welded tubes Apparatus for making butt-welded tube from a strip includes a pair of grooved weld rolls for aligning the longitudinal edges of the strip bent into a tubular shape. To insure that the inside seam of the tube is flush regardless of variations in thickness ... | 05/24/1977 |
| 3944775 | Welding process An internal spreader bar provides control of the convergence point and convergence angle of opposite electrically heated edges of a skelp during a tube seam welding operation and other controls are practiced to increase weld pressure at the faying surface... | 03/16/1976 |
| 3937914 | Method and apparatus for manufacturing welded metal tubes of finite length Methods and apparatus for manufacturing welded metal tubes of finite length in which an almost complete, axially split tube is advanced into a welding head where one edge face at one side of the split is accurately positioned and clamped and then the othe... | 02/10/1976 |
