| Patents for B21D 31 - Other methods for working sheet metal, metal tubes, metal profiles (2,523) |
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| 08/14/1991 | CN1053761A Method for producing a part of non-derelopable shape from a sheet-metal blank, and shaped part obtained by this method |
| 08/13/1991 | US5038593 Method of and apparatus for texturizing workpieces |
| 08/06/1991 | US5037665 Printing stamping; coining; precise control; packaging; doors |
| 08/06/1991 | CA1287245C Wear-resistant laser-engraved metallic carbide surfaces for friction rolls for working elongate members, methods for producing same andmethods for working elongate members |
| 07/10/1991 | CN1013143B Textile rolls having tungsten carbide coating that has been laser treated |
| 07/03/1991 | EP0435266A2 Method for manufacturing expanded mesh sheet and apparatus for carrying out method |
| 06/26/1991 | EP0434499A1 Method of producing a non-developable piece from a flat metal plate and workpiece made by this method |
| 06/19/1991 | CA2032444A1 Process for shaping a blank into a non developable ferm, and form produced therewith |
| 06/12/1991 | EP0431161A1 Machine tool for cutting out transverse ribs on a rectangular cross-section element for heat exchanger |
| 04/30/1991 | US5010759 Wheel rim shaping apparatus having a single cotter supportable at both ends thereof |
| 04/16/1991 | US5007271 Device and a method for embossing a metal foil |
| 03/19/1991 | US5001017 Compositions of matter for stopping fires, explosions and oxidations of materials and build up of electrostatic charges and method and apparatus for making same |
| 02/07/1991 | WO1991001195A1 Device for making tubular element of rectangular cross-section with transverse ribs for heat exchanger |
| 01/30/1991 | EP0410161A1 Method and device for providng perforations on spacers for insulated glass panes |
| 09/20/1990 | WO1990010513A1 Machine tool for cutting out transverse ribs on a rectangular cross-section element for heat exchanger |
| 09/05/1990 | EP0385217A2 Apparatus for stamping a sheet-like material, in particular a labelling material |
| 08/29/1990 | EP0384340A2 Apparatus for scribing grain-oriented electrical steel strip |
| 08/01/1990 | EP0379649A1 Method for manufacturing rim holes in sheet metal blanks |
| 07/11/1990 | EP0377397A2 Composition of material for stopping fires or explosions, and method therefor |
| 05/31/1990 | WO1990006000A1 Battery manufacturing process |
| 05/01/1990 | US4921118 Manufacture of filling material |
| 04/04/1990 | EP0361660A2 Sheet metal article |
| 02/27/1990 | US4903400 Method of producing an embossed structure |
| 02/07/1990 | EP0354152A2 Improved programmable magnetic repulsion punching apparatus |
| 02/07/1990 | EP0353231A1 Process and apparatus for forging one piece track roller rim. |
| 01/08/1990 | EP0353231A4 Process and apparatus for forging one piece track roller rim. |
| 12/13/1989 | EP0345489A2 Improvements in machines for producing expanded sheet metal |
| 12/13/1989 | EP0345488A2 Improved machine for producing expanded sheet metal |
| 11/30/1989 | WO1989011356A1 Manufacturing expanded metal mesh |
| 11/21/1989 | US4881307 Expansion of sheet materials |
| 11/08/1989 | EP0340619A1 Apparatus for making expanded sheet metal |
| 11/02/1989 | WO1989010219A1 Device for producing expanding material |
| 10/10/1989 | US4872381 Programmable magnetic repulsion punching apparatus |
| 08/01/1989 | CA1257989A1 Strain imparting device |
| 05/16/1989 | US4829799 Method of manufacturing substrate for memory disk |
| 05/02/1989 | US4825680 Method of manufacturing metal substrates for disk for memory storage media |
| 04/25/1989 | US4823578 Method of manufacturing substrate for memory disk |
| 01/03/1989 | US4794985 Finned heat exchanger tubing with varying wall thickness |
| 12/28/1988 | CN88211560U Expanded metal |
| 11/30/1988 | EP0293101A2 A method of making an angled joint |
| 11/23/1988 | EP0292127A2 Finned heat exchanger element and method of making the same |
| 10/26/1988 | CN87100283A Continuous working process of long metal strips and the applied metallic mould |
| 09/22/1988 | WO1988006931A1 Process and apparatus for forging one piece track roller rim |
| 08/10/1988 | EP0277425A1 Elongate carrier strip |
| 07/05/1988 | US4754634 Device for forming bead to pipe |
| 06/14/1988 | CA1237879A1 Apparatus for forming fins for heat exchangers |
| 05/31/1988 | US4747225 Weapon barrel with metallorgically bonded wear resistant liner |
| 05/25/1988 | EP0268304A2 Machines and method for web processing by longitudinal compression |
| 05/10/1988 | US4742706 Strain imparting device |
| 04/12/1988 | US4736610 Method and apparatus for making grain bin flooring |
| 03/30/1988 | EP0139066B1 Device for burnishing a foil |
| 03/02/1988 | CN87104555A Expansion of sheet materials |
| 01/19/1988 | US4719780 Tool point and its working method and tool for making and flanging a hole |
| 01/07/1988 | EP0251735A2 A process and machine for the formation of expanded mesh materials |
| 08/12/1987 | EP0231369A1 Portable perforating unit |
| 08/11/1987 | US4685323 Method for increasing the buckling load capacity and the comprehensive and tensile properties of a column |
| 08/05/1987 | EP0230633A2 Friction roll with wear-resistant surface |
| 07/22/1987 | CN86108779A Textile rolls having tungsten carbide coating that has been laser treated |
| 07/21/1987 | US4680847 Method of producing a spring plate |
| 07/21/1987 | CA1224328A1 Manufacture of rotatable ignition files or flint wheels |
| 07/16/1987 | WO1987004095A1 Method of preparing base for memory disk |
| 07/16/1987 | WO1987004094A1 Method of preparing base for memory disk |
| 07/16/1987 | WO1987004093A1 Method of preparing metal base for memory disk |
| 07/15/1987 | EP0228570A2 Method and device for making an embossing structure on press bands |
| 06/16/1987 | US4672834 Method for making extended heat transfer surfaces and a tool for putting said method into practice |
| 06/02/1987 | US4669290 Louvering apparayus for the perforation of tubine or piping |
| 04/22/1987 | EP0219181A2 Strain imparting device |
| 03/17/1987 | US4649607 Apparatus for making expanded metal |
| 02/24/1987 | CA1218267A1 Method and installation for producing a profile element to be used as an embedded concrete form |
| 02/12/1987 | WO1987000776A1 Portable perforating unit |
| 01/02/1987 | DE3621144A1 Method for expansion of a tubular element |
| 01/02/1987 | DE3523025A1 Method and apparatus for bending elongated metallic workpieces |
| 11/11/1986 | US4621397 Method of and apparatus for producing expanded metal |
| 09/02/1986 | US4608853 Percussion apparatus |
| 07/08/1986 | US4598569 Method and apparatus for making grain bin flooring |
| 06/24/1986 | US4596129 Apparatus for forming fins for heat exchangers |
| 06/10/1986 | US4594280 Expanded perforated sheet having integral unexpanded sides and method of manufacturing the same |
| 05/27/1986 | US4590655 Method for expanding a tubular member |
| 03/11/1986 | CA1201560A1 Deformation and shapes of sheet-like structural members |
| 02/12/1986 | EP0171119A1 Device and method for producing a nozzle plate for ink jet printers |
| 01/10/1986 | CN85102160A Novel electromagnetic foil-hammering machine |
| 12/11/1985 | EP0164151A1 Production method for expanded metal, and expanded metal structure produced according to this method |
| 12/11/1985 | EP0163700A1 Expanding machine |
| 10/08/1985 | US4545440 Attachment for pneumatic hammers for punching holes of varying size |
| 09/18/1985 | EP0154802A1 Percussion tool |
| 08/07/1985 | EP0150265A2 A method for improving the properties of an elongate structural member |
| 06/20/1985 | WO1985002567A1 Expanding machine |
| 06/18/1985 | US4523448 Method and apparatus for continuously producing a core member of a trim |
| 06/18/1985 | CA1188933A1 Device for corrugating sheet material |
| 06/18/1985 | CA1188875A1 Method of and device for manufacturing a jet nozzle plate for ink jet printers |
| 06/11/1985 | US4522860 Material for reinforcing core in a structure |
| 05/02/1985 | EP0139066A1 Device for burnishing a foil |
| 04/16/1985 | US4510786 Method and apparatus of making double reverse corrugated material |
| 03/12/1985 | US4503696 Method for the production of spike-free sheets |
| 03/05/1985 | US4502315 Device for corrugating sheet material |
| 02/20/1985 | EP0133254A2 Method and apparatus for calibrating, deforming and compressing the surfaces of tubes |
| 02/05/1985 | US4497377 Pneumatic tool |
| 12/25/1984 | US4489580 Method for deforming a flat sheet metal workpiece |
| 12/11/1984 | US4486927 Production of expanded metal parts |
| 11/13/1984 | US4481802 Method of peening the inside of a small diameter tube |