| Patents for B21D 37 - Tools as parts of machines covered by this subclass (19,804) |
|---|
| 08/07/1991 | CN1053567A Press die |
| 07/24/1991 | EP0437978A1 Stamping and forming machine having interchangeable punch subassembly |
| 07/17/1991 | EP0436792A2 Press for making dimensionally stable pressed articles from particulate material |
| 07/16/1991 | US5031483 Process for the manufacture of laminated tooling |
| 07/03/1991 | EP0435722A1 Method and device for forming a sheet metal blank in particular for producing a mask for a cathode ray tube |
| 07/02/1991 | US5027633 Box makers forms |
| 07/02/1991 | CA1285465C Lower tool support for a stamping machine or the like |
| 06/19/1991 | CA2032456A1 Blank forming process and apparatus, namely for producing a cathode tube mask, and mask so produced |
| 06/11/1991 | US5022256 Clamping device |
| 06/04/1991 | US5020350 Apparatus and method for lubricating and cooling in a draw and iron press |
| 05/21/1991 | US5016458 Method and device for pressing sheet material with a deformable punch under a ram |
| 05/15/1991 | EP0427012A1 Die set |
| 05/15/1991 | CN1051317A Formation method for reducing guide pipe |
| 05/08/1991 | EP0425532A1 Press for manufacturing sheet metal preforms in several stages |
| 05/07/1991 | US5012712 Tool holder for punching tools |
| 05/02/1991 | DE3935498A1 Metal forming press with multiple punches and dies - has mechanism to disengage drive to one or more punches |
| 05/02/1991 | CA2027263A1 Quick change tooling for press machine |
| 04/24/1991 | EP0424190A1 Tool outfit comprising a pair of articulated tongs with an undercut system |
| 04/24/1991 | CN2075560U Miniature multi-working position progressive die |
| 04/23/1991 | US5009095 Method for forming a collared hole in sheet material |
| 04/17/1991 | CN2075114U Motor piece punching die with positioning pin |
| 04/17/1991 | CA2000836A1 Roll former with quick automated tool changer |
| 04/16/1991 | US5007814 Device for separating and closing a split mold having two halves |
| 04/16/1991 | US5007282 Stamping and forming machine having interchangeable punch sub-assembly |
| 04/16/1991 | US5007275 Progressive die for drawless fin |
| 04/02/1991 | US5003809 Method of mounting and demounting molds to and from press molding machine |
| 03/27/1991 | EP0418893A2 Method of machining a press die |
| 03/26/1991 | US5001922 Quick change tooling for press machine |
| 03/26/1991 | CA1282143C Microprocessor controlled hydraulic system for clamping a die to apress |
| 03/21/1991 | CA2025694A1 Tooling comprising tongs with two pivoted arms, with a release system |
| 03/20/1991 | EP0417311A1 Process for producing mold |
| 03/20/1991 | CN2073330U Auto-oil filler type perforating press |
| 03/20/1991 | CN2073329U Sheet stamping device of punching machine |
| 03/19/1991 | US5000022 Presswork machinery |
| 03/12/1991 | WO1991003334A1 Process for the improvement of the deep-drawing property of sheet metal or of a sheet metal blank |
| 03/12/1991 | US4998428 Method of cleaning stamping dies |
| 03/12/1991 | CA2066438A1 Metal sheet or blank stamping |
| 03/06/1991 | EP0210195B1 Ball-point writing instrument containing an aqueous ink composition |
| 02/26/1991 | US4995289 Die assembly having improved insert retaining system and having reversible die inserts |
| 02/26/1991 | US4995255 Method of changing dies for a press machine |
| 02/19/1991 | US4993255 Device for fixing an elongated part such as punch, die or similar tool on the platen of a bending-press |
| 01/22/1991 | US4985983 Sheet working machine with tool magazine |
| 01/22/1991 | CA1279229C Reinforced plastic retainer rings for sheet metal forming |
| 01/16/1991 | CN2069316U Bellows processing device |
| 01/14/1991 | WO1991000784A1 Arrangement at press line |
| 01/14/1991 | CA2063585A1 Arrangement at press line |
| 01/09/1991 | EP0407039A1 Die assembly having improved insert retaining system and having reversible die inserts |
| 01/01/1991 | US4981061 Steel rule die and method of manufacture |
| 12/26/1990 | CN1010930B Fabrication technique and application of fully steel-rimmed epoxy plastic dies |
| 12/19/1990 | EP0403065A2 Plastics tooling with compression adjustment |
| 12/18/1990 | US4977804 Punch press |
| 12/18/1990 | US4977772 Method and apparatus for forming reforming and curling shells in a single press |
| 12/16/1990 | CA2012135A1 Plastic tooling with compression adjustment |
| 12/11/1990 | US4976400 Plastic tooling with compression adjustment |
| 12/04/1990 | US4974434 Controlled shot peening |
| 11/22/1990 | EP0398486A2 Box makers forms |
| 11/21/1990 | CN1047044A Die for sheet press work |
| 11/20/1990 | US4970888 Method of changing workpiece holders for press machine |
| 11/14/1990 | EP0396991A1 Machining device for inserting in a press |
| 11/14/1990 | CN2065516U Simultinuous same position drilling and pressing die for aluminium cover |
| 11/08/1990 | DE3914762A1 Multipurpose metal forming machine tool - has rotatable tool holder to bring required tool into operation |
| 10/31/1990 | CN2064689U Adjusting plate splice die |
| 10/30/1990 | CA1275634C 180 degres inverting machine |
| 10/18/1990 | WO1990011846A1 Removable slide presses |
| 10/17/1990 | EP0392795A2 Die exchange apparatus for the use of a press brake |
| 10/13/1990 | CA2006903A1 Removable slide presses |
| 10/10/1990 | CN1009947B Mould lubricant exbausting apparatus for knocking-out mechanism |
| 10/09/1990 | CA1275012A1 Simplified construction of tooling to extend the use of serial tools in the manufacturing process of short and medium runs of metal articles |
| 10/04/1990 | WO1990011145A1 Ceramic wall-ironing tool and method for manufacturing same |
| 10/03/1990 | EP0390355A1 Maintaining a preferred vibration mode in an annular article |
| 09/28/1990 | CA2012930A1 Maintaining a preferred vibration mode in an annular article |
| 09/27/1990 | DE4016837A1 Separating upper and lower parts of tool set - by using additional guide bars to prevent canting of upper tool |
| 09/26/1990 | EP0388644A2 Sheet metal punching machine |
| 09/26/1990 | EP0388415A1 Use of a tool steel for tools for pressing motor car sheet steel. |
| 09/20/1990 | WO1990010512A1 Process for producing mold |
| 09/19/1990 | EP0387349A1 Sheet metal pressing resin mold and method of manufacturing same |
| 09/12/1990 | EP0387121A1 Clamping device for a long piece such as a punch, a die or such a tool on a table of a press bending machine |
| 09/12/1990 | EP0386046A1 Drive module for tool aggregates |
| 08/28/1990 | US4951375 Punch press utilizing workpiece guidance system to effect tool changing |
| 08/23/1990 | DE3905047A1 Apparatus for drawing sheet metal, in particular for manufacturing stainless-steel sinks |
| 08/22/1990 | CN2060700U Connector type cold stamping die set frame |
| 08/15/1990 | CN1009170B Method for processing die by coating technique |
| 08/14/1990 | US4947719 Punch and die system |
| 08/14/1990 | US4947718 Punch and die system |
| 08/14/1990 | US4947717 Punch and die system |
| 08/14/1990 | US4947716 Punch and die system |
| 08/14/1990 | US4947673 Removable slide presses |
| 08/08/1990 | EP0380894A1 Device for deep-drawing sheet materials |
| 08/07/1990 | US4945752 Tool carrier for a punch or stamping machine |
| 08/07/1990 | US4945629 Vertical carrousel |
| 08/02/1990 | DE4002528A1 Stanzwerkzeug Punch |
| 07/25/1990 | CN2059605U Hydraulic synchronized stretch assembling die |
| 07/18/1990 | EP0377865A2 Punching and nibbling machine fitted with a device for an automatic quick tool change |
| 07/18/1990 | CN1043893A Device for pressing sheet material |
| 07/17/1990 | US4941344 Die sets |
| 07/11/1990 | CN2059109U Multi-purpose oblique wedge angled mould |
| 07/11/1990 | CN1043646A Method and device for pressing sheet material with deformable punch under ram |
| 07/11/1990 | CN1043645A Method and device for pressing sheet material on elastic forming die |
| 07/04/1990 | EP0376809A1 Method and device for deep-drawing sheet materials on an elsatic formation lower die |
| 07/04/1990 | EP0376808A1 Method and device for deep-drawing sheet materials with a stamp deformable underneath a plunger |