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| Number | Title | Issue Date |
| 7146735 | Method of making a bearing ring for a large roller bearing A bearing ring for a large roller bearing is formed with at least one annular race which is hardened by heating by juxtaposing that race with an inductor across a spacing which is maintained during the heating and then quenching. The spacing is controlled selectivel... | 12/12/2006 |
| 6911632 | Method for controlling the position of a foil strip edges A method for controlling the edges (7, 7′) of a foil strip guided in a shaping funnel of a device producing tubular bodies from the foil strip by an overlapping weld seam using a guide wedge, the strip being then welded. According to the invention, after we... | 06/28/2005 |
| 6262403 | Apparatus for aligning ends of diffusion bonded materials A diffusion bonding method having a step of adjusting ends of material to be bonded before bonding the material after setting the materials in the diffusion bonding apparatus, whereas a diffusion bonding apparatus having a means of finishing ends of mater... | 07/17/2001 |
| 6116496 | Method and apparatus for continuous rolling by reheating locally cold portions produced by clamping during flash-butt welding A method of continuous rolling comprises the steps of: forming a continuous billet 20 by joining a rear end of preceding billet 21 with a front end of succeeding billet 21 by flash-butt welding 3; removing burr on welded portions of the continuous billets... | 09/12/2000 |
| 5922234 | System apparatus and method for heating metal products in an oscillating induction furnace Disclosed is a heating system for heating metal products in an oscillating induction furnace and a method of operation of the heating system. The heating system includes an oscillating induction furnace that in turn comprises a plurality of induction coil... | 07/13/1999 |
| 5767491 | Heating apparatus for making a continuous longitudinal seam weld on a laminated packaging material web The disclosure relates to an apparatus for making a continuous welding joint. A material web (20) formed into a tube (8) is sealed along the longitudinal joint seam in that a joint heater (1), preferably an induction heater, is disposed in parallel along ... | 06/16/1998 |
| 5767490 | Apparatus for fusing two workpieces produced from sheet metal by induction heating An apparatus for welding together two metal sheets (4, 5) includes clamping rails (17, 18; 23, 24) for positionally fixing the sheets (4, 5) each on a table (2, 3), and an induction device movable towards and away from a joint (15) between the metal sheet... | 06/16/1998 |
| 5753894 | Hot rolling method for continuously joining metal blocks and an apparatus for the same The invention comprises a continuous hot rolling method in which a rear end portion of a preceding metal block and a fore end portion of a succeeding metal block are cut and the metal blocks are joined to each other by heating and pressing followed by a f... | 05/19/1998 |
| 5710412 | Fluid tooling for thermoplastic welding Fluid tooling for use in an inductive welding system for creating a fusion bond along a bond line between two thermoplastic parts includes an elongated vessel made of fluid impervious flexible material and having an elongated axis and an open end at each ... | 01/20/1998 |
| 5637249 | Steckel mill coiler furnace incorporating heated pinch rolls For economy of operation, as much as possible of the total length of a steel strip being rolled by a Steckel mill should be maintained at an acceptably high temperature. To this end, the trailing edge of the strip is drawn into the coiler furnace to the e... | 06/10/1997 |
| 5329099 | Method of maintaining housing of reactor pressure vessel and heat treatment equipment therefor A method of maintaining the housing of a reactor pressure vessel having: a reactor pressure vessel into which cooling water is introduced; a cylindrical housing which penetrates an end bracket of the reactor pressure vessel; and a circumferential weld for... | 07/12/1994 |
| 4599502 | Induction hardening of steel A method for induction hardening through hardened chromium-molybdenum hot work die steel comprising the steps of induction heating to a uniform temperature above the upper critical temperature, cooling, and double tempering at temperatures below the lower... | 07/08/1986 |
| 4568015 | Method of forming electric welded steel tube In a method of forming an electric welded steel tube, wherein a hot-rolled sheet is formed into a cylindrical shape, with the central portion thereof being lowered as the forming progresses, and thereafter, subjected to reduction in the circumferential di... | 02/04/1986 |
| 4377732 | Method of and apparatus for the production of profile members and hollow bodies from a plurality of metal strips of constant thickness A method and apparatus for manufacturing metal profile members, hollow bodies and the like wherein a plurality of continuous band-like metal strips of constant wall thickness as viewed in cross-section are continuously fed along separate paths which conve... | 03/22/1983 |
| 4296293 | Progressive welding and forging of overlapped seams in tubular bodies This relates to a method and apparatus for welding thin walled sheet steel tubular members of the type primarily intended for use as container bodies. The sheet steel may be provided with a suitable coating, such as tin plating, and is preferably heated b... | 10/20/1981 |
| 4268736 | Induction welding apparatus for manufacture of tubing Induction welding apparatus for manufacture of tubing which includes a modifier between the induction coil and pressure rolls, an impeder inside the tube with laminations parallel to the radius of the tube which intersects the tube slit, a device for stab... | 05/19/1981 |
| 4165628 | Fin pass roll A fin pass roll for use as a single roll or as pairs of mating forming rolls for bending a flat metal strip into a desired tubular shape or a tube form. The fin pass roll is split into three sections; that is, a fin roll having a fin and fin side rolls in... | 08/28/1979 |
| 4142663 | Apparatus and method for making perforated tube A rolled sheet metal tube having perforations therein with integrally formed associated protrusions. The protrusions alter the direction of the flow of fluid passing through the tube and ideally suit the tube for employment in mufflers for internal combus... | 03/06/1979 |
| 3999029 | Fin to tube welding by high frequency current source A method is disclosed for welding one or more fins or longitudinally extended plate like members to tubes or pipes by means of radio frequency resistance heating. A V-gap necessary for the high frequency welding technique is created by deforming the tube ... | 12/21/1976 |
