| Patents for B21C 37 - Manufacture of metal sheets, rods, wire, tubes, profilesor like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape (9,784) |
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| 02/02/1982 | US4313328 Providing cardan and universal joint-type shafts with gearing |
| 02/02/1982 | US4313327 Extrusion die for forming multi-passage tubular members |
| 02/02/1982 | US4313248 Method of producing heat transfer tube for use in boiling type heat exchangers |
| 01/26/1982 | US4312207 Rolling mill for forming cross ribbed pipes |
| 01/19/1982 | US4311506 Method and apparatus for continuously producing very small diameter metal wire having a glass coating thereover |
| 01/19/1982 | CA1116381A1 Tube with surface-enlarging elements attached to the inside, method and apparatus for manufacturing such tube |
| 01/12/1982 | US4310740 Process for producing large-sized rectangular or square steel pipes |
| 01/12/1982 | US4309810 Porous metal films |
| 12/30/1981 | EP0042450A1 Process for producing silencer cases with a folded longitudinal seam and apparatus for carrying out this process |
| 12/29/1981 | US4307593 Apparatus for forming collars around openings in tubes or plates |
| 12/24/1981 | WO1981003631A1 Edge preforming of metal plate |
| 12/24/1981 | WO1981003630A1 A blank for manufacturing an air duct of rectangular cross section |
| 12/23/1981 | EP0042011A2 Device for the production of tubes by helically winding a preferably corrugated strip |
| 12/22/1981 | US4306619 Tube provided with inner fins and outer fins or pins, particularly for heat exchangers, and method therefor |
| 12/22/1981 | US4306437 System for planishing metal pipe |
| 12/22/1981 | CA1114589A1 Heat transfer elements |
| 11/25/1981 | EP0040234A1 Z-bar guide apparatus. |
| 11/24/1981 | US4301672 Process for forming semi-float axle tubes and the like |
| 11/24/1981 | CA1112951A1 Tube forming method |
| 11/17/1981 | US4301348 Process for producing large-sized rectangular or square steel pipes |
| 11/17/1981 | US4300275 Method of manufacturing a radiant energy collecting or emitting element |
| 11/10/1981 | US4299108 Cage-roll unit for metal pipe forming |
| 11/10/1981 | US4299107 Device for forming a collar around a hole in the wall of a pipe |
| 11/10/1981 | US4299106 Finned tubing |
| 11/10/1981 | CA1112031A1 Method of making a helically corrugated tube |
| 11/04/1981 | EP0038937A1 Spiral seamed tube formed from a helically wound corrugated strip, and method for its manufacture |
| 10/21/1981 | EP0038277A1 Machine for forming a tubular profile |
| 10/21/1981 | EP0037854A1 Tube for heat exchangers, especially for evaporators, and process for making said tube |
| 10/13/1981 | CA1110580A1 Process for producing copper-cored titanium wire |
| 10/07/1981 | EP0036968A1 Process for producing soldered, multi-layer metal tubes, and apparatus for carrying out this process |
| 10/06/1981 | US4293022 Method for continuous casting of metal strips |
| 10/06/1981 | US4292828 Apparatus for manufacturing cold-work hardened cylinders |
| 09/29/1981 | CA1109777A1 Hand operated tube crimping apparatus |
| 09/29/1981 | CA1109631A1 Method and apparatus for continuous casting of metal strips |
| 09/23/1981 | EP0036381A2 Method of forming profiles, especially tubular profiles |
| 09/23/1981 | EP0036365A1 Process for manufacturing workpieces by hydraulic-pressure shaping, and apparatus for carrying out this process |
| 09/09/1981 | EP0035245A1 Improvements in or relating to methods of and/or apparatus for flanging tube ends |
| 09/08/1981 | US4287947 Solar panel elements and method of manufacture thereof |
| 09/08/1981 | US4287742 Machine for forming curved conduits |
| 09/08/1981 | US4287739 Method for producing a helically wound pipe having a predetermined diameter |
| 08/25/1981 | US4285222 Machine for manufacture of spiral tubing with folded seam |
| 08/18/1981 | US4283976 Apparatus for precutting metal strip in the manufacture of spiral strip pipes, e.g. ventilation ducts |
| 08/18/1981 | US4283824 Method for manufacturing heat exchanger tubing |
| 08/11/1981 | US4282734 Structure of truing piston cylinders |
| 08/06/1981 | WO1981002119A1 A flange forming drill means |
| 08/06/1981 | WO1981002118A1 A flange forming drill means |
| 08/04/1981 | US4281706 Method of making helical metallic ribbon for continuous edge winding applications |
| 08/04/1981 | CA1106133A1 Reactive gaseous cooling medium for the manufacture of wire |
| 07/14/1981 | US4277871 Heat exchanger panels and method of manufacture |
| 07/08/1981 | EP0031422A1 Apparatus for producing tubes of given length |
| 06/30/1981 | US4275785 Heat exchange tubing blade assembly |
| 06/25/1981 | WO1981001737A1 Pipe coupling |
| 06/23/1981 | US4274621 Tubes and structures formed thereby |
| 06/23/1981 | US4274315 Electronic control system for strip peeling apparatus |
| 06/23/1981 | CA1103582A1 Rotatable piercing tools for forming bossed holes |
| 06/23/1981 | CA1103523A1 Transport installation and method of transporting can bodies for a fully automated resistance welding machine |
| 06/11/1981 | WO1981001532A1 Device for rotating cylindrical bodies of multilayer high-pressure vessels |
| 06/09/1981 | US4272004 Z-Bar guide apparatus |
| 06/09/1981 | CA1102738A1 Process of fabricating hollow bead rings |
| 06/02/1981 | US4270690 Method of forming variably rifled tubes |
| 06/02/1981 | US4270374 Method of and device for forming an integral lubricating nipple on a tubular member |
| 05/27/1981 | EP0029380A1 Method of forming a bead in the wall of a metallic tube |
| 05/26/1981 | US4269267 Fin and tube assembly and a method of making the assembly |
| 05/19/1981 | CA1101245A1 Bellows sections welder |
| 05/12/1981 | US4266896 Deburring tubes or pipes on the inside |
| 05/12/1981 | CA1100790A1 Method and installation for flaring tubes on heavy plate |
| 05/05/1981 | US4265678 Metal wire cord |
| 05/05/1981 | CA1100398A1 Process and apparatus for the production of a pipe- shaped hollow body especially of container tubes from a multilayer composite sheet material |
| 04/30/1981 | WO1981001116A1 Z-bar guide apparatus |
| 04/21/1981 | US4262412 Composite construction process and superconductor produced thereby |
| 04/21/1981 | CA1099621A1 No-size squeezing of 180 degree boiler-tube return bends |
| 04/15/1981 | EP0027080A1 Machine for producing tube branchings and calibrations |
| 04/07/1981 | US4260096 Method for reduction and sizing of welded pipes and mill for effecting same |
| 04/07/1981 | US4259771 Apparatus for producing heat transfer tube |
| 03/24/1981 | US4257675 Optical-fiber submarine cable and manufacturing method thereof |
| 03/24/1981 | CA1098080A1 Zinc coated wire |
| 03/17/1981 | US4255860 Calibrating apparatus for inside and outside surfaces and alignment of pipe sections |
| 03/11/1981 | EP0024827A1 A method of producing light gauge metallic strip material |
| 03/03/1981 | US4254075 Method for forming holes in a member |
| 02/24/1981 | US4253006 Apparatus and method for internally weld-cladding pipe elbows |
| 02/24/1981 | US4251907 Method for the manufacture of thin-walled metal tubes |
| 02/24/1981 | CA1096147A1 Heat transfer tube and method of making same |
| 02/10/1981 | US4249406 Line pipe forming apparatus and method |
| 02/10/1981 | CA1095293A1 Single motor drive for a feed roller |
| 02/03/1981 | CA1094787A1 Method of forming helically finned pipes and an apparatus for forming the same |
| 01/27/1981 | US4247033 Method of and device for producing multi-layer pipes |
| 01/27/1981 | US4246772 Pressing branch pipe on thick-walled shell-device for realization thereof |
| 01/27/1981 | CA1094649A1 Method for manufacturing spiral-seam-welded steel pipe by gas shielded arc welding |
| 01/20/1981 | US4246322 Removable, soft metal protective coating |
| 01/20/1981 | CA1093867A2 Apparatus and method for the fabrication of internally weld-cladded pipe elbows |
| 01/13/1981 | US4244202 Apparatus for making corrugated flexible metal tubing |
| 01/13/1981 | CA1093349A1 Process and device for the manufacture of annular or tube-shaped metallic working pieces |
| 12/30/1980 | CA1092727A1 Method for fabricating ultra-narrow metallic lines |
| 12/23/1980 | US4241287 Apparatus for welding pins to a tube interior |
| 12/09/1980 | CA1090992A1 Advancing apparatus for spine fin tubing |
| 12/09/1980 | CA1090991A1 Apparatus for remotely repairing tubes in a steam generator |
| 12/02/1980 | US4236299 Method and device for winding spiral fins onto oval tubing |
| 11/26/1980 | EP0019521A1 Device for feeding a long cladding product for use in an apparatus for the internal coating of tubes |
| 11/25/1980 | CA1090172A1 Apparatus and method of the fabrication of internally weld-cladded pipe elbows |
| 11/11/1980 | US4232813 Method and apparatus for making bent pipe |