| Patents for B21D 25 - Working sheet metal of limited length by stretching, e.g. for straightening (421) |
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| 05/13/1999 | CA2250991A1 Sheet metal machining by way of stretching and without removal of material |
| 03/25/1999 | WO1999014001A1 Stretch draw die and method |
| 03/18/1999 | DE19738955A1 Method for controlling a forming process |
| 03/02/1999 | CA2161037C Method of and apparatus for producing large metal plates |
| 02/25/1999 | WO1999008818A1 A metallic strip and method and apparatus for working a metallic strip |
| 02/25/1999 | CA2300443A1 A metallic strip and method and apparatus for working a metallic strip |
| 01/19/1999 | US5860314 Stretch bend forming apparatus, method and product formed thereby |
| 06/30/1998 | CA2164999C Stretch controlled forming mechanism and method for forming metal blanks |
| 04/21/1998 | US5740690 Method for stretcher leveling metal with a gripping element |
| 01/20/1998 | US5709759 Method of working a hot-rolled strip |
| 10/08/1997 | EP0799658A2 Gripper means for stretcher leveller apparatus |
| 07/23/1997 | EP0785286A1 Apparatus and methods for rolling and stress relaxing a metal strip |
| 12/03/1996 | US5579658 Method of and apparatus for producing large metal plates |
| 11/27/1996 | CN1136480A Stretch controlled forming mechanism and method for forming metal blanks |
| 11/20/1996 | EP0693981A4 Apparatus and method for the stretch forming of elongated hollow metal sections |
| 11/20/1996 | CN1135939A Method of working hot-rolled strip |
| 10/23/1996 | EP0738781A1 Process for producing strips of stainless steel |
| 04/24/1996 | EP0707905A1 Method for making sheet metal plates, especially large sized sheet metal plates, and device therefor |
| 02/20/1996 | US5491999 Gripper means for stretcher leveler apparatus |
| 01/31/1996 | EP0693981A1 Apparatus and method for the stretch forming of elongated hollow metal sections |
| 05/31/1995 | CN1028617C Die Assembly for and method of forming metal end unit |
| 03/21/1995 | US5398534 Structure for supporting forming tools in a machine for forming sheet metal by stretching |
| 02/22/1995 | EP0555274B1 Bending of profiled sheet metal |
| 10/13/1994 | WO1994022611A1 Apparatus and method for the stretch forming of elongated hollow metal sections |
| 10/04/1994 | US5351517 Method of, and a machine for, stretching and bending a profiled length of material |
| 09/29/1994 | DE4345158A1 Method and apparatus for the stretch-forming of semi-finished products |
| 09/29/1994 | DE4309317A1 Method and apparatus for the free forming of semi-finished products |
| 07/13/1994 | EP0439588B1 Stretch shaping method and apparatus |
| 07/12/1994 | US5327764 Apparatus and method for the stretch forming of elongated hollow metal sections |
| 06/28/1994 | US5323631 Method for forming a hollow workpiece using a snake tool |
| 05/17/1994 | CA1329498C Controlled shot peening |
| 05/03/1994 | CA2015754C Die assembly for and method of forming metal end unit |
| 01/12/1994 | EP0578362A1 Gripper means for stretcher leveller apparatus |
| 09/30/1993 | DE4213490C1 Composite shaping body for stretch-forming machine - has supporting heads with similarly-curving surfaces tilting in all directions on jacks for elastic cover accommodating metal sheet |
| 06/16/1993 | EP0546319A1 Stretch bending method for bending hollow profiles and mandrel stretch bending machine |
| 01/26/1993 | US5181411 Gripper means for stretcher leveler apparatus |
| 10/13/1992 | CA1308608C Leveling sheet metal strip |
| 07/15/1992 | EP0494633A1 Structure for holding the forming tools of a metal plate stretch-forming machine |
| 07/09/1992 | CA2058871A1 A structure for supporting forming tools in a drawing machine for forming sheets of metal |
| 06/24/1992 | EP0491071A1 Stretch-forming machine |
| 06/17/1992 | EP0490576A1 Forming compound curvatures in metal sheets |
| 06/11/1992 | CA2056872A1 Method of and machine for forming compound curvatures in metal sheets by drawing |
| 05/26/1992 | US5115661 Forming parts from ductile materials |
| 05/14/1992 | WO1992007671A1 Bending of profiled sheet metal |
| 02/11/1992 | US5086636 Stretch-forming machine |
| 02/11/1992 | US5086635 Method of and machine for forming compound curvatures in metal sheets by drawing |
| 01/07/1992 | US5077887 Method for producing gripper means for stretcher leveler apparatus |
| 12/31/1991 | CA1293652C Forming of metal articles |
| 07/30/1991 | US5035133 Method and apparatus for hot die draw forming metal sheets |
| 05/15/1991 | CN1012620B Resilient support made of low-hardness silicone elastomer, capable of being used in elastoforming stamping |
| 05/14/1991 | US5014537 Convertible lockbead-drawbead |
| 03/19/1991 | US5000029 Elastoforming die/form block comprising low-hardness silicone elastomer |
| 02/22/1991 | WO1991002605A1 Stretch shaping method and apparatus |
| 02/05/1991 | US4989439 Springback stretch press |
| 01/22/1991 | CA1279229C Reinforced plastic retainer rings for sheet metal forming |
| 01/08/1991 | US4982593 Gripper means for stretcher leveler apparatus |
| 12/05/1990 | EP0400006A1 Forming parts from ductile materials |
| 12/04/1990 | US4974434 Controlled shot peening |
| 11/28/1990 | CN1047232A Die assembly for and method of forming metal end unit |
| 11/22/1990 | EP0398529A1 Die assembly for and method of forming metal end unit |
| 11/20/1990 | US4970886 Stretch shaping method and apparatus |
| 10/16/1990 | CA1275201C Press forming sheet metal |
| 09/18/1990 | CA1274336A1 Low hardness silicon elastomer flexible support useable for deep drawing through elastodynamic shaping |
| 06/19/1990 | US4934168 Die assembly for and method of forming metal end unit |
| 05/22/1990 | US4926673 Process and apparatus using an elastoforming die/form block comprising low-hardness silicone elastomer |
| 01/17/1990 | EP0350671A2 Apparatus for bending or straightening work pieces by plastic deformation |
| 12/19/1989 | EP0248845A4 Press forming sheet metal. |
| 04/25/1989 | US4824891 Elastoforming die/form block comprising low-hardness silicone elastomer |
| 04/11/1989 | US4819473 Press forming sheet metal |
| 02/23/1989 | WO1989001370A1 Forming parts from ductile materials |
| 08/30/1988 | CA1241258A1 Method of drape drawing a shadow mask for a colour display tube and device for such a method |
| 07/05/1988 | US4754635 Device for drape drawing a shadow mask for a color display tube |
| 06/21/1988 | US4751838 Machine and process for leveling sheet metal strip |
| 05/31/1988 | US4747292 Stretch forming apparatus |
| 01/19/1988 | US4719786 Reinforced plastic retainer rings for sheet metal forming and method of making |
| 12/16/1987 | EP0248845A1 Press forming sheet metal |
| 12/03/1987 | DE3633480C1 Plate-stretching head |
| 11/17/1987 | US4706486 Jaw assembly for stretch press |
| 11/10/1987 | US4704886 Stretch-forming process |
| 10/22/1987 | DE3712705A1 Erosionsschild fuer die oberflaeche von tragflaechen sowie verfahren zur herstellung derartiger erosionsschilder Erosion shield for the surface 'of wings, and process for manufacture of such erosion signs |
| 10/13/1987 | US4698995 Method for stretch forming drop hammer parts utilizing stretch wrap forming techniques |
| 09/09/1987 | EP0236243A1 Process for deep drawing using an elastomeric siloxane matrix having low hardness |
| 08/26/1987 | CN87100670A Resilient support made of low-hardness silicone elastomer, capable of being used in elastoforming stamping |
| 08/11/1987 | US4685321 Method of drape drawing a shadow mask for a color display tube |
| 06/18/1987 | WO1987003518A1 Press forming sheet metal |
| 06/16/1987 | EP0225573A2 End sealing apparatus for hollow members |
| 05/05/1987 | CA1221394A1 Sheet metal pull clamp |
| 03/04/1987 | EP0213107A1 Method and device for determining the bending curve for stretch bending the outside profile elements of a ship's hull |
| 02/24/1987 | US4644626 Forming of metal articles |
| 10/29/1986 | EP0199246A2 Method for plastically deforming elongated hollow members |
| 08/26/1986 | US4608234 Reduction of bending or buckling of flat resistors |
| 04/30/1986 | EP0179506A1 Method of drape drawing a shadow mask for a colour display tube and device for such a method |
| 04/09/1986 | EP0177027A2 Apparatus for stretch-bending elongate material |
| 02/26/1986 | EP0172732A1 Forming of metal articles |
| 01/21/1986 | US4565146 Boat hull and method of making same |
| 06/25/1985 | CA1189393A1 Boat hull and method of making same |
| 05/08/1985 | EP0140739A1 Apparatus for tensioning a thin sheet |
| 02/26/1985 | US4501135 Stress sensor for yield-point detection in a stretch press |
| 02/05/1985 | US4497193 Gripping head of an hydraulic sheet stretcher |
| 01/08/1985 | US4492105 Tightening device for the gripping jaws of a plate stretcher |