| Patents for B21D 5 - Bending sheet metal along straight lines, e.g. to form simple curves (9,374) |
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| 10/29/1991 | US5060495 Press brake having plural probe pairs for measuring bend angles of workpiece |
| 10/24/1991 | CA2040943A1 Apparatus for making siding for buildings and the like |
| 10/23/1991 | EP0453182A1 Manufacture of metal tubes |
| 10/23/1991 | EP0453181A1 Manufacture of metal tubes |
| 10/22/1991 | US5058406 Plate bending machine equipped with a plate clamping manipulator and a plate position detecting device |
| 10/22/1991 | US5058269 Method of forming rectangular metal tubes |
| 10/19/1991 | CA2040667A1 Manufacture of metal tubes |
| 10/19/1991 | CA2040665A1 Manufacture of metal tubes |
| 10/17/1991 | DE4011681A1 Rolling stand with sliding roll shafts - for tube forming using hydraulically tensioned roll shafts axially withdrawn by integral cylinders for rapid roll changing |
| 10/10/1991 | DE4011007A1 Motorised stop for sheet bending machine - uses stop beam and stop fingers with separate adjustment |
| 10/01/1991 | US5052913 Apparatus for forming a door panel belt trim |
| 10/01/1991 | US5052208 Machine tool |
| 09/26/1991 | DE4009466A1 Formation of corners of flanged rectangular metal sheets - uses roller of double conical form driven vertically over corner |
| 09/25/1991 | CN1054729A Method and apparatus for mixing solid or semi-solid wastes with additives |
| 09/24/1991 | US5050422 Bending apparatus for bending a marginal flange on a workpiece |
| 09/19/1991 | WO1991013705A1 Panel bender |
| 09/19/1991 | WO1991013704A1 Sheet-metal bending device |
| 09/19/1991 | DE4008149A1 Chamfering device for plate-shaped workpieces - is computer numerically controlled and has thickness measurement device enabling uniform flexing angle to be maintained |
| 09/18/1991 | EP0446810A1 Clamping apparatus for press brake |
| 09/18/1991 | CN1054549A Contouring of metal sheets |
| 09/18/1991 | CN1013934B Roll forming of metal articles |
| 09/10/1991 | CA1288675C Portable sheet bending brake |
| 09/05/1991 | WO1991012908A1 Device for judging suitability of die for press brake |
| 09/04/1991 | EP0444169A1 Tooling for folding press for air folding. |
| 08/28/1991 | EP0442995A1 Folding press. |
| 08/27/1991 | US5042287 Manipulator device for a bending machine and a method for changing the position of the workpiece in a bending process |
| 08/22/1991 | WO1991012098A1 Device for detecting bend angle of press brake |
| 08/22/1991 | DE4005095A1 Prodn. of equipment for cylinder or cone casing - uses flat sheet section between upper tool and die bent in stages along straight bending path |
| 08/21/1991 | EP0442036A2 Leaf spring cambering method and apparatus |
| 08/14/1991 | EP0441436A2 Bending unit of a machine for bending metal sheets |
| 08/14/1991 | EP0440818A1 Control device for press brake |
| 08/13/1991 | US5038597 Bending apparatus for bending a marginal flange on a workpiece |
| 08/13/1991 | US5038592 Apparatus for making siding for buildings and the like |
| 08/08/1991 | DE4001963C1 Plate making system - has strips with sections of same length cut preferably from band and connected to each other along longitudinal sides |
| 08/07/1991 | EP0430942A4 Contouring of metal sheets |
| 08/06/1991 | US5036694 Method and apparatus for bending the flange of a workpiece |
| 08/06/1991 | US5036688 Fender forming system |
| 08/06/1991 | CA1287215C Glass sheet press bending system |
| 07/31/1991 | CN1053452A Phosphorus family wear-resisting cast iron quenching ball and production process thereof |
| 07/30/1991 | US5035566 Automatic change of fingers of the single arm bending robot |
| 07/30/1991 | US5035136 Bending apparatus for bending a margin flange |
| 07/25/1991 | WO1991001831A1 Process and device for making a plate from a strip |
| 07/25/1991 | CA2063719A1 Process and device for making a plate from a strip |
| 07/16/1991 | US5031440 Apparatus for forming long plate member |
| 07/11/1991 | WO1991010180A1 A system for creating command and control signals for a complete operating cycle of a robot manipulator device of a sheet metal bending installation by simulating the operating environment |
| 07/11/1991 | WO1991009696A1 A method of positioning a metal sheet for a sheetmetal working machine |
| 07/09/1991 | US5029462 Method of bending a workpiece including setting a bending process, and preparing bending data |
| 06/27/1991 | WO1991008894A1 Hydraulic folding press with mobile lower beam |
| 06/27/1991 | WO1991008869A1 Device for control of a robot manipulator for a metal sheet bending installation |
| 06/27/1991 | DE4038865A1 Bending tool producing hat-shaped profiles - has centre punch movably guided in stroke direction, and top holder in punch, facing ejector |
| 06/27/1991 | CA2046914A1 Hydraulic bending press with movable lower platen |
| 06/26/1991 | EP0434541A1 Hydraulic bending press with movable lower beam |
| 06/26/1991 | CN2079538U Vertical bendin sheet machine set |
| 06/26/1991 | CN2079537U Tube making machine formed by core roller |
| 06/19/1991 | CN1052265A Apparatus for roll forming metal articles |
| 06/13/1991 | DE3940984A1 Forming of sheet metal shells or tubes - by using pair of bending rollers with mechanism to swing one roller about the axis |
| 06/12/1991 | EP0430942A1 Contouring of metal sheets |
| 06/11/1991 | US5022256 Clamping device |
| 06/11/1991 | US5022248 Press brake apparatus with powered adjustable female die jaws |
| 06/05/1991 | WO1991008064A1 Apparatus for manufacturing welded steel pipe and method of operating thereof |
| 06/05/1991 | CN1051875A Apparatus for rounding and conveying onwards sheet-metal blanks for can bodies |
| 05/30/1991 | WO1991007139A1 Producing prostheses |
| 05/29/1991 | EP0429004A1 Edging device for printing plates |
| 05/23/1991 | DE4036289A1 Detecting angles produced when flat sheet is bent |
| 05/22/1991 | EP0427886A1 Die for negative angle forming |
| 05/21/1991 | US5016806 Tube weld mill |
| 05/21/1991 | US5016459 Method and guide roll stand for guiding and shaping strip material in a pipe mill |
| 05/08/1991 | DE3936621A1 Bender for metal sheets - has rollers of individual adjustable edge roller sections |
| 05/07/1991 | US5012729 Device for working plate-shaped material |
| 05/07/1991 | US5012661 Sheet workpiece bending machine |
| 05/02/1991 | DE3935658A1 Verfahren zum gegenlaeufigen biegen eines bleches Method for opposing bending a sheet |
| 04/27/1991 | WO1991006383A1 Process for the two-directional bending of sheet metal |
| 04/27/1991 | WO1991006382A1 Device for bending sheet metal |
| 04/23/1991 | US5009098 Press and curve-forming means therefor |
| 04/17/1991 | EP0422459A2 Method and apparatus for forming a door panel belt trim |
| 04/17/1991 | CA2000836A1 Roll former with quick automated tool changer |
| 04/16/1991 | US5007278 Die device |
| 04/16/1991 | US5007264 Method and apparatus for the bending of workpieces |
| 04/13/1991 | CA2026664A1 Apparatus and method for forming a door panel belt trim |
| 04/10/1991 | EP0332674B1 Edging and folding machine |
| 04/10/1991 | CN2074688U Marmonic speed reducing parallel down adjusting three roll plate rolling machine |
| 04/10/1991 | CN1050508A Cold roll-formed structures and method and apparatus for producing same |
| 04/09/1991 | US5005394 Programming system for the single arm bending robot |
| 04/04/1991 | WO1991004114A1 A profiling device in plants for profiling metal-sheets or the like |
| 03/21/1991 | WO1991003371A1 Folding press |
| 03/21/1991 | WO1991003333A1 Control device for brake of press |
| 03/21/1991 | WO1991003332A1 Tooling for folding press for air folding |
| 03/20/1991 | EP0418114A2 Apparatus and method for bending of thin sheet metals |
| 03/05/1991 | US4996815 Process to manufacture a seal-holding profile and the profile obtained from said process |
| 02/27/1991 | EP0413955A2 Device for rounding and conveying on sheet blanks for can shells |
| 02/21/1991 | WO1991001828A1 Device for bending metal sheets |
| 02/20/1991 | CN1049393A Double-locating type cable band and its moulding process |
| 02/19/1991 | US4993255 Device for fixing an elongated part such as punch, die or similar tool on the platen of a bending-press |
| 02/19/1991 | US4993254 Method and apparatus for bending material |
| 02/12/1991 | US4991422 Plate bending machine |
| 02/05/1991 | US4989444 Industrial robot for pressing system, pressing system, and method for bending plate material |
| 01/23/1991 | CN2069761U Semi-automatic hydraulic sheet-bending machine with two rollers |
| 01/16/1991 | EP0407443A1 Bending apparatus. |
| 01/09/1991 | EP0406301A1 Bending apparatus. |
| 01/09/1991 | EP0406300A1 Bending apparatus. |