| Patents for B21D 3 - Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts (4,094) |
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| 08/29/1991 | DE4005962A1 Straightening machine for anode rods - has straightening jaws and rotating unit to turn the rods in the straightening position through 90 deg. |
| 08/27/1991 | US5042280 Machine for straightening metallic bars or rods or wires or tubes |
| 08/08/1991 | DE4003258A1 Straightening profiled girder - which are detected with centre web engagement by inner disc between two outer ones |
| 08/07/1991 | EP0439464A1 A method and apparatus for correcting deviations in the shape of hardened metal objects |
| 07/30/1991 | US5035130 Antirotation straightening machine |
| 07/25/1991 | DE4001901A1 End straightening mechanism for pipes etc. - has several sliding rams, radially movable about common axis |
| 07/24/1991 | EP0438205A2 Method and apparatus for straightening the ends of elongated workpieces |
| 07/02/1991 | US5027635 Channel hot-forming apparatus |
| 06/19/1991 | CN1052266A 复合转毂式矫直机 Complex transfer hub leveler |
| 06/12/1991 | EP0431775A2 Method of continuous finishing of pipe |
| 05/29/1991 | DE3938810A1 Straightening street lamp posts - involves machine which grips lower end of post and applies force to upper end |
| 04/24/1991 | EP0423592A1 Combined assembly to straighten and linearise sections |
| 04/24/1991 | EP0423591A1 Device for the controlled and independent rocking of straightening and bending platforms |
| 04/23/1991 | US5009097 Plant or apparatus utilizing a universal straightening-bending machine |
| 04/21/1991 | CA2027877A1 Device for the controlled and independent rocking of straightening and bending platforms |
| 04/18/1991 | CA2027662A1 Combined assembly to straighten and linearise sections |
| 04/17/1991 | CN2075113U 313钢管矫直机 313 steel straightening machine |
| 04/10/1991 | EP0421575A1 Adjustable guide for rotating cylindrical member |
| 03/26/1991 | US5001917 Method and apparatus for truing or straightening out of true work pieces |
| 03/20/1991 | EP0417469A2 Automatic straightening machine |
| 02/27/1991 | EP0414036A2 Straightening machine for long material |
| 02/22/1991 | WO1991002605A1 Stretch shaping method and apparatus |
| 02/06/1991 | EP0411167A1 Installation for peeling and straightening for machining bar-shaped products like axles, wire and tubes or the like |
| 02/05/1991 | US4989433 Method and means for metal sizing employing thermal expansion and contraction |
| 02/05/1991 | US4989432 System and method of detecting roll position in a rotary straightener |
| 12/04/1990 | US4974434 Controlled shot peening |
| 11/20/1990 | US4970886 Stretch shaping method and apparatus |
| 11/15/1990 | WO1990013373A1 Smart straightening press |
| 11/06/1990 | US4967581 Process for producing a rolled section having a corrugated part and installation intended for this purpose |
| 11/06/1990 | US4967579 Adjustable guide for rotating cylindrical member |
| 10/31/1990 | EP0395191A1 Method of and device for cooling a long cylindrical body |
| 10/04/1990 | DE3910221A1 Richtmaschine fuer draht, insbesondere fuer betonstahldraht Straightening machine for wire, especially for concrete steel wire |
| 09/25/1990 | CA1274450A1 Wire straightening device by means of a plurality of rollers |
| 09/05/1990 | EP0385719A2 Method and apparatus for metal sizing employing thermal expansion and contraction |
| 08/21/1990 | US4949565 Distortion straightening method |
| 07/25/1990 | EP0379028A1 Orthogonal adjustment unit and method for orthogonal adjustment of straightened bars |
| 07/18/1990 | CA2007981A1 Orthogonal adjustment unit and method for orthogonal adjustment of straightened bars |
| 06/27/1990 | EP0374465A1 Plant or apparatus utilizing a universal straightening-bending machine |
| 06/06/1990 | EP0371280A2 Method of straightening sheet metal, strip, panels, sections, beams, etc. |
| 06/06/1990 | CN1042673A Pipe-end straightening method and device for large-bore steel pipe |
| 05/31/1990 | DE3838885A1 Inclined-roll straightening machine for tubes and bars |
| 05/23/1990 | CA2002431A1 Plant or apparatus utilizing a universal straightening-bending machine |
| 05/16/1990 | CN2057120U Steel pipe straightening and derusting machine |
| 04/11/1990 | EP0204713B1 Closed guiding channel for round bars |
| 04/04/1990 | EP0362122A1 Method of heat-straightening steel tubes |
| 04/04/1990 | EP0361038A2 Method of straightening an elongate metal object, in particular the connecting rod of a reciprocating-piston engine |
| 04/03/1990 | US4912957 Smart straightening press |
| 02/27/1990 | US4903520 Method for straightening cast anodes |
| 02/27/1990 | US4903519 Apparatus for straightening cast anodes |
| 02/07/1990 | EP0353428A2 Straightening machine |
| 01/31/1990 | EP0353179A2 Roll fastening for roller straightening machines |
| 01/17/1990 | EP0350671A2 Apparatus for bending or straightening work pieces by plastic deformation |
| 12/06/1989 | EP0345241A1 Method for producing a laminated section comprising a corrugated part, and installation therefor |
| 11/16/1989 | WO1989010806A1 A method and apparatus for correcting deviations in the shape of hardened metal objects |
| 11/16/1989 | DE3815304A1 Method and apparatus for bending or straightening sections and strips by means of rolls or rollers |
| 10/31/1989 | US4876873 Antirotation method to straighten sections and antirotation straightening machine which employs such method |
| 10/25/1989 | EP0338144A1 Apparatus for cleaning and straightening a tubular article |
| 10/25/1989 | EP0338038A1 Process and means for making metal inking rolls |
| 10/18/1989 | CN2046045U Synchronous cutting-off apparatus of metal pipe flattener |
| 10/04/1989 | CN1035982A Process and means for making metal inking rolls, particularly for flexographic printing, and rolls obtained with such process and means |
| 09/12/1989 | US4865243 Sizing tool for a machine for the longitudinal seam welding of rounded can bodies |
| 08/29/1989 | US4860566 Method and apparatus for straightening a workpiece |
| 08/23/1989 | CN1034966A Straightening method and straightener for sewing-machine needles |
| 07/26/1989 | CN1034150A Straightening method by tensile force and associated apparatus |
| 07/11/1989 | CA1257187A1 Sleeve insertion |
| 07/04/1989 | CA1256784A1 Device for straightening rotationally symmetrical cold-deformable workpieces |
| 05/23/1989 | CA1254543A1 Method for straightening a rail and straightened rail |
| 05/16/1989 | US4829801 Cable straightening apparatus |
| 05/03/1989 | CN2036874U Straightening device for metallic round tube and bar |
| 04/25/1989 | US4823599 Method of operating a machine for the stress relief of workpieces by vibration |
| 04/18/1989 | US4821547 Wheel-driving straightener for straightening longitudinal cylindrical member |
| 03/16/1989 | DE3729619A1 Method and device for straightening longitudinally displaceable tubes rotating about their longitudinal axis |
| 03/09/1989 | DE3728628A1 Gripping and feeding device |
| 02/23/1989 | WO1989001414A1 Process and means for making metal inking rolls |
| 02/22/1989 | EP0304047A1 Process and means for making metal inking rolls, particularly for flexographic printing, with highly hardened superficial engraved layer, and rolls obtained with such process and means |
| 01/18/1989 | EP0299111A2 Method and apparatus for straightening unbalanced workpieces |
| 12/28/1988 | CN88211572U Sewing-machine needle straightening device |
| 12/22/1988 | DE3735015A1 Straightening press |
| 12/08/1988 | DE3717660A1 Mobile testing and straightening apparatus for monorail rails |
| 12/06/1988 | US4788844 Apparatus for straightening slender shafts |
| 11/16/1988 | CN88102675A Sizing tool for machine for longitudinal seam welding of rounded can bodies |
| 11/09/1988 | EP0289748A2 Calibrating tool for a straight bead welding machine for rounded can shells |
| 08/16/1988 | US4763504 Straightening machines and methods |
| 08/09/1988 | CA1240161A1 Reel type continuous marine pipe laying system |
| 07/27/1988 | EP0275876A2 Method and apparatus for aligning a work piece |
| 07/05/1988 | US4755238 Straightened asymmetrical railway rail having low residual internal stress produced by stretching steel rail having specified tensile strength by subjecting to tensile stress exceeding offset yield strength up to plastic deformation |
| 06/07/1988 | US4748729 Mounting a roller in a straightening machine |
| 06/01/1988 | EP0269157A2 Antirotation method to straighten sections and antirotation straightening machine which employs such method |
| 05/25/1988 | CN87105049A Multi-roll straightener |
| 05/19/1988 | DE3638816C1 Method for the production of steel rails with low residual stress by means of roller straightening |
| 05/19/1988 | DE3637703A1 Setting tool for hinge straps of vehicle doors |
| 05/18/1988 | CN87106584A Method of operating maching for relaxing of workpieces by vibration |
| 05/04/1988 | EP0265801A2 Straightening device for open profiles |
| 04/05/1988 | US4735072 Straightener roll machine for brake shoe |
| 03/30/1988 | EP0261273A1 Method for the operation of a machine for stress relief by vibration |
| 03/16/1988 | CN87200790U Single-roller froup and convex and concave type three-roller straightening machine for thin-wall tabe |
| 03/15/1988 | US4730474 Method of relieving residual stress in metal pipe |
| 02/23/1988 | US4726212 Machine for straightening and stress-relieving steel rails |
| 02/18/1988 | DE3711277A1 Verfahren zur steuerung und kontrolle der profilumformung Procedures to control and control of the profile cold forming |
| 01/19/1988 | US4719781 Device for straightening metal wires by means of a plurality of rollers |