Patents
Sitemap › B21 - Mechanical metal-working without essentially removing material; Punching metal › B21D - Working or processing of sheet metal or metal tubes, rods or profiles without essentially removing material; Punching › B21D 28 - Shaping by press-cutting; Perforating
Patents for B21D 28 - Shaping by press-cutting; Perforating (12,707)
07/1983
07/12/1983US4392400 Trimming and piercing apparatus
07/05/1983US4391174 Punch press machine with adjustable tool positioning
07/05/1983US4391123 Automatic punching machine
07/05/1983US4391118 Mechanism for forming a hole through a forged workpiece
06/1983
06/29/1983EP0082537A1 Method of making packets of sheet blanks and device for carrying it out
06/28/1983US4389764 Method for the production and assembly of lock parts
05/1983
05/17/1983CA1146343A1 Apparatus for punching and winding of motor and transformer cores
05/10/1983US4382395 Loading device for a machine tool, particularly for machining panels of sheet metal or other materials
05/10/1983CA1146062A1 Turret punch presses
04/1983
04/26/1983US4380871 Mechanical punch driver
03/1983
03/30/1983EP0075152A2 Improved punch apparatus
03/22/1983US4377100 Punch retainer
03/22/1983US4377084 Press apparatus having resilient stop blocks
03/08/1983US4375775 Stamping press die support mounting
03/08/1983US4375774 Adjustable punch head
03/01/1983CA1141996A1 Die finish-cutting machine
02/1983
02/15/1983US4373413 Punch press apparatus for placement and alignment of a knife holder
01/1983
01/25/1983US4369907 Punching and riveting machine
01/25/1983US4369682 Rotary die cutters having magnetically-attracted waste ejector
01/11/1983CA1139216A1 Draw punch
12/1982
12/21/1982US4364527 Tension take-up and speed control
12/21/1982US4364281 Driving mechanism for tool slides of punching and bending machines
12/14/1982US4363253 Automatic hollow punch research device and relevant control, for die-cutting machines, particularly for footwear production
12/07/1982US4362078 Method of blanking
11/1982
11/16/1982CA1135618A1 Turret index system
11/09/1982CA1135175A1 Method and apparatus of feeding material for progressive punching
11/02/1982US4356719 Mandrel jaw and method of manufacture
11/02/1982CA1134589A1 Beveled lobe anti-skid grating and method of manufacturing same
10/1982
10/26/1982US4355530 Punching machine for making different products at the same step
10/14/1982WO1982003491A1 Iron core laminate manufacturing apparatus
10/13/1982EP0062562A1 Method and device for the automatic control of the press rams by means of cylinders with self blocking piston rods
10/12/1982US4353164 Draw punch
09/1982
09/28/1982USRE31042 Laser cutting head attachment for punch presses
09/22/1982EP0060397A1 Punching tool for the wasteless blanking of packing strips
09/22/1982EP0060355A1 Apparatus for producing a blank from stock material
09/08/1982EP0059432A2 Press machine
08/1982
08/24/1982US4345744 Working machine with flame cutter and cooling unit
08/17/1982US4344342 Method for the manufacture of washers and the like
08/17/1982CA1129759A1 Automatic punching and bending machine
08/10/1982US4343210 Punch press
08/03/1982US4342214 Pilot assembly for progressive die machines
07/1982
07/27/1982US4341137 Material forming apparatus
07/27/1982US4341105 Force multiplier for punch presses
07/20/1982US4339976 Punch retainer
07/20/1982US4339975 Shock dampening system for presses
07/20/1982CA1127910A1 Method and apparatus for producing a blank from stock material
07/14/1982EP0055880A2 Punching and nibbling machine having die-carrying turrets with horizontal and parallel axes
07/13/1982CA1127528A2 Pneumatic press
07/13/1982CA1127525A1 Toothed plate connectors
06/1982
06/23/1982EP0054395A2 Method and apparatus for perforating metal strip
06/08/1982US4333329 Cross transport press
06/01/1982US4332179 Combined punch retainer and fluid-actuated stripper
05/1982
05/25/1982US4331049 Numerically controlled automatic notching press
05/11/1982US4328695 Punch adaptor for folding machine
05/11/1982US4328665 Link for steel sprocket chains
05/04/1982US4327642 Inserts for cutting charges
04/1982
04/13/1982CA1121662A1 Punch press machine with adjustable tool positioning
03/1982
03/30/1982US4322191 Die finish-cutting machine
03/23/1982US4320676 Blanking press having stripping means
03/23/1982US4320647 Method of and apparatus for making elements with profiled cross-section from sheet metal
03/23/1982US4320645 Apparatus for fabricating electrical equipment
03/16/1982US4319504 Damping device for abruptly occurring forces in a shear or shear press machine
03/10/1982EP0046929A2 Treating machine with a thermic cutting-ray device
03/09/1982CA1119673A1 Laser cutting head attachment for punch presses
03/02/1982US4317351 Methods of and/or apparatus for punching holes in sheet metal
02/1982
02/24/1982EP0046310A1 Axial air gap motor
02/23/1982US4316399 Combined punch retainer and fluid actuated stripper
02/23/1982US4316317 Method and apparatus for adjusting roller rings on a shaft
02/16/1982US4315356 Forming expanded mesh sheet from deformable strip
01/1982
01/26/1982CA1116996A1 Device for punching holes in tubing
01/19/1982US4311086 System for damping abrupt movement of a punch press ram
01/19/1982US4310939 Method of producing semicircular washers having a projection to prevent rotation
01/13/1982EP0043389A1 Tool and method for precision cutting
01/12/1982US4310114 Control arrangement for dual slide pneumatic feeders
01/12/1982US4309951 Method for deburring sheet metal parts, such as can covers
12/1981
12/23/1981EP0042047A1 Method of, and apparatus for, constructing a laminated rotor
12/23/1981EP0042046A1 Method of, and apparatus for, manufacturing laminated dynamoelectric machine structures
12/15/1981CA1114241A1 Forming expanded mesh sheet from deformable strip
12/01/1981US4302961 Press or similar machine tool
11/1981
11/11/1981EP0039577A1 Method and apparatus for pressworking a workpiece or material
11/10/1981US4299110 Method for forming a hole through a forged workpiece
11/03/1981US4297866 Asymmetrical shaping of slit segments of meshes formed in deformable strip
10/1981
10/21/1981EP0038199A1 Turret punch press
10/21/1981EP0038198A1 Workpiece clamp
10/15/1981WO1981002861A1 Workpiece clamp
10/15/1981WO1981002860A1 Improved turret
10/13/1981US4294396 Method for manufacturing brazed parts
10/07/1981EP0037154A1 Process for inserting gold dot in electrical terminals
10/07/1981EP0037096A2 Device working like a stamp or press
10/06/1981US4292869 Unitary punch and die assembly
09/1981
09/29/1981US4291443 Forming expanded mesh sheet from deformable strip
09/22/1981US4290294 Method for producing aerosol can tops
09/22/1981US4290251 Storm sashes and method and apparatus for manufacturing
09/03/1981WO1981002399A1 Blank and draw press tool
08/1981
08/26/1981EP0034406A1 Rotary die cutters
08/25/1981US4285754 Method and apparatus for producing planar elements in the construction of surfaces and bodies
08/25/1981US4285259 Turret index system
08/18/1981US4283978 Notching machine
08/11/1981CA1106753A1 Shock dampening systems for presses
08/11/1981CA1106703A1 Asymmetrical shaping of slit segments of meshes formed in deformable strip
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