Patents for B21D 28 - Shaping by press-cutting; Perforating (12,707)
07/1981
07/29/1981EP0032628A2 Punch press
07/28/1981US4280426 Method of manufacturing wheel discs
07/14/1981US4277994 Matrix element
07/14/1981US4277868 Machine and method for single pass taper milling
07/07/1981US4277200 Structure to retard fretting and method of manufacture
06/1981
06/30/1981US4275924 Hinge mount having a wobble gear adjuster for a tiltable seat back of a motor vehicle seat
06/24/1981EP0030649A2 Process for the production of lids made of sheet metal for containers, especially cans
06/09/1981US4272812 Numerical control apparatus for stepped feeding at punch and nibbling machines
05/1981
05/26/1981US4269283 Method and apparatus for acoustical damping of punching machines and the like
05/26/1981US4269094 Device for punching holes in tubing
05/26/1981CA1101782A1 Safety devices for mechanically operated apparatus such as a punch press
05/19/1981US4267758 Actuator mount for power shear or punch
05/19/1981US4267753 Apparatus for producing a blank from stock material
05/13/1981EP0028588A1 Automatic punching machine
05/05/1981US4265104 Method and device for cutting a metal strip simultaneously into at least three continuous comb-shaped components
04/1981
04/28/1981CA1099959A1 Metal forming process
04/14/1981US4261237 Rigidly supported molded plastics material punch guide and stripper
03/1981
03/31/1981CA1098438A1 Pneumatic press
03/24/1981US4257292 Piercing units
03/24/1981US4257251 Metal forming process
03/17/1981US4255993 Angle iron cutting
03/10/1981CA1097134A1 Printing blanket hole forming apparatus and method
02/1981
02/17/1981US4250785 Turret type punch press having a plurality of strikers
02/17/1981US4250784 Press for punching and cutting plate-shaped workpieces, especially sheet metal workpieces
02/10/1981CA1095399A1 Die holder assembly
02/03/1981US4248111 Punch guide assembly
02/03/1981US4248075 Method of forming aperture with rounded edges in sheet material
02/03/1981CA1094888A1 Pipe perforating machine
01/1981
01/27/1981US4246815 Volumetrically deformed polymeric support for punches
01/20/1981US4245491 Method and device for producing hollow articles having flanges
01/07/1981EP0021591A2 Anti-slip grating
12/1980
12/30/1980US4241632 Blanking machine for blanking holes in sheet of metal
12/30/1980CA1092505A1 Method and apparatus for safety for presses and the like
12/24/1980WO1980002856A1 Beveled lobe anti-skid grating and method of manufacturing same
12/23/1980US4240314 Centering and wear compensating means for punch presses and the like
12/23/1980CA1092018A2 Turret punches
12/16/1980CA1091573A1 Punch retainer
12/09/1980CA1091143A1 Container bottom cutting apparatus and method
11/1980
11/26/1980EP0019200A1 Numerically controlled notching press
11/18/1980US4233872 Hydraulic shock absorption in punch or cutting presses
11/18/1980CA1089758A2 Sheet metal web handling method, apparatus and coil construct
11/11/1980US4232575 Arrangement for punching out circular blanks
11/11/1980CA1089410A1 Internal and external extruded nipples or nozzles in pipe headers or boiler drums
11/11/1980CA1089256A1 Apparatus for punching, drilling or otherwise working a profile steel member
10/1980
10/29/1980EP0017920A1 Cutting tool for cutting out a cut of sheet metal
10/28/1980US4230011 Automatic center punch for templates
10/28/1980CA1088651A1 Apparatus for forming holes in the flanges of structural members
10/28/1980CA1088486A1 Sheet metal web handling method, apparatus and coil construct
10/21/1980US4228672 Rotary notcher and former
10/15/1980EP0017632A1 Method and apparatus for adjusting roller rings on a shaft
10/14/1980US4227449 Punching press
10/14/1980US4227393 Method and apparatus for punching openings in tubes
10/07/1980US4226109 Tool for the stamping of holes or the like in sheet material such as metal plate
09/1980
09/23/1980US4223547 Method of hole forming
09/23/1980CA1086214A1 Rigidly supported molded plastics material punch guide and stripper and method of making same
09/17/1980EP0015580A1 Improvements in or relating to methods of and/or apparatus for punching holes in sheet metal
09/02/1980US4220062 Machine having a plurality of reciprocating working tools which may be selectively brought into operation
08/1980
08/20/1980EP0014400A2 Multisectional liner for linear, roof-shaped, hollow charges
08/12/1980US4217068 Protecting device of a clamping means for a sheet-shaped material working machine
08/05/1980CA1083031A1 Method and apparatus for producing openings in sheet material
07/1980
07/29/1980US4214496 Shock dampening systems for presses
07/22/1980US4213733 Automatic side gauge for machine tool workpiece control and method
07/22/1980US4213319 Thickness gauge
07/22/1980CA1082097A1 Angularily settable punch and die apparatus
07/22/1980CA1082049A2 Sheet metal web handling method, apparatus and coil construct
07/15/1980CA1081438A1 Press forming of flanged articles
07/08/1980USRE30324 Letter and number kits and the process of preparing same
07/08/1980US4211099 Apparatus for making slotted beam contact elements
07/01/1980US4210041 Method for cutting a plurality of identical, irregular, non-polygonal pieces from material with minimum waste
07/01/1980CA1080611A1 Rotary die lock structure
07/01/1980CA1080451A1 Making insulation-piercing, slotted beam electrical connectors
06/1980
06/24/1980US4208935 Control system for a hydraulic press
06/10/1980US4206667 Tool holding apparatus for presses
06/03/1980US4205567 Apparatus for safety operating presses and the like
06/03/1980US4205548 Stamping tools
06/03/1980US4205545 Method of forming louvered openings in tubular members
05/1980
05/27/1980US4204380 Device for conveying, stacking, and packing aligned laminations of electrical machines
05/20/1980US4203336 Punch change mechanism for a double pressure pin press
05/14/1980EP0010685A1 Punch and winding machine
05/13/1980CA1077387A1 Automatic load unload turret punch
05/06/1980US4201905 Laser cutting head attachment for punch presses
05/06/1980CA1076951A1 Retainer for punch and die sets
04/1980
04/29/1980US4200019 Table stop for a cutting machine
04/29/1980US4199971 Method for the manufacture of profiled reed blades for loom reeds
04/29/1980CA1076473A1 Parting tool
04/22/1980US4198884 Method of manufacturing a punching die
04/15/1980US4197772 Automatic feeding apparatus for punch press
04/01/1980US4195565 Fluid-operated press
04/01/1980CA1074691A1 Holing method and device
03/1980
03/19/1980EP0008773A1 Punch press with laser cutting head attachment
03/11/1980CA1073341A1 Cutting press with stroke terminating means
03/04/1980US4191080 Apparatus for punching storm sashes
02/1980
02/12/1980US4187752 Rotary die lock structure
02/06/1980EP0007776A1 Press for installing fasteners in workpieces
02/05/1980US4186581 Drive arrangement for a tool carriage of a machine tool
01/1980
01/09/1980EP0006285A1 Method of manufacturing push plate and actuator rod assemblies; products made according to this method
01/08/1980US4182022 Device for tool changing in punching machines
01/08/1980CA1069385A1 Method and arrangement for fastening and centering punching tools
12/1979
12/25/1979US4180357 Apparatus and method for perforating tubing and method of producing part of such apparatus
12/25/1979CA1068596A Assembly for enabling close tolerance punching with a reusable system