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)
10/1991
10/01/1991US5052207 Apparatus for, and a method of, cutting a blank
09/1991
09/25/1991EP0448508A1 Punching device
09/24/1991CA1289407C Duct mounting structure for prefabricated curtain wall with air conditioning system
09/18/1991EP0446536A1 Device for retaining press tool elements in their holder
09/17/1991US5048816 Workpiece registration system and method for determining the position of a sheet
09/17/1991US5048385 Indexable multi-tool for punch press
09/10/1991US5046389 Universal punch block apparatus
09/10/1991US5046232 Working apparatus having a plurality of working heads
09/03/1991US5044244 Heavy duty punch
09/03/1991US5044239 Punch for punch press
09/03/1991US5044237 Method for stamping stepper motor laminations
09/03/1991US5044189 Scrap guiding and chopping in a shell press
08/1991
08/27/1991US5042362 Hydraulic control system for the drive control of a double-acting hydraulic cylinder
08/27/1991US5042336 Control apparatus and method for progressive fracture of workpieces
08/27/1991US5042124 Machine for punching out butterfly clips for fastening to a frame of a spring core
08/21/1991EP0442313A1 Mechanical punching method for gutters and combined punching and drawing tool therefor
08/21/1991CN2083082U Driving automatic punch press
08/20/1991US5040397 Rotary apparatus and method
08/20/1991CA1287793C Stamping system
08/14/1991EP0441046A1 Method for stamping stepper motor laminations
08/13/1991US5038599 Ball lock punch retainer
08/07/1991EP0439684A1 Punch press
07/1991
07/31/1991EP0243407B1 Improvements to punch presses
07/31/1991CN2081767U Cut die with locating plate for thin sheet
07/24/1991EP0438107A1 Scrap guiding and chopping in a shell press
07/24/1991EP0437978A1 Stamping and forming machine having interchangeable punch subassembly
07/20/1991CA2034132A1 Scrap guiding and chopping in a shell press
07/16/1991US5031431 Method and device for controlling the stroke of a press machine
07/10/1991EP0300000B1 Press drive
07/10/1991EP0258329B1 Punching and bending machine for wires and strips
07/09/1991US5029392 Two point punch
07/03/1991EP0435266A2 Method for manufacturing expanded mesh sheet and apparatus for carrying out method
07/03/1991CN2080006U Band saw automatic tooth cutting machine
07/02/1991US5027631 Method and device for controlling the stroke of a press machine
07/02/1991CA1285465C Lower tool support for a stamping machine or the like
06/1991
06/25/1991US5025691 Punch guide
06/19/1991EP0432551A2 Method of making a centering ring in a clamp leg of a U-shaped sheet-metal nut
06/19/1991EP0432173A1 Rotary punching machine.
06/18/1991USRE33613 Rotary apparatus
06/18/1991US5024127 Punching mechanism
06/13/1991DE4039506A1 Program checking equipment for NC machine tool - allows component form to be displayed on machine screen with marking region
06/11/1991US5023770 High-speed press control system
06/11/1991US5022255 Structure of punch for venetian blind manufacture
06/05/1991EP0363474A4 High-speed press control system
06/04/1991US5020407 Punch head base
05/1991
05/21/1991US5016807 Method for producing workpieces of metal
05/21/1991US5016461 Method and apparatus for stamping weld adapters
05/16/1991DE4020687C1 Metal sheets pressing and cutting tool - has U=shaped frame carrying work-table and eccentric press drive mechanism
05/15/1991EP0427215A2 Notching apparatus
05/07/1991US5012712 Tool holder for punching tools
05/02/1991DE3935498A1 Metal forming press with multiple punches and dies - has mechanism to disengage drive to one or more punches
04/1991
04/24/1991EP0424025A1 Punch and die set having improved slug management system
04/24/1991EP0423429A1 Stamping tool
04/18/1991WO1991004808A1 Method and apparatus for aligning mating form tools
04/18/1991WO1991002939A3 Flexible linear explosive cutting or fracturing charge
04/17/1991EP0423052A2 Punching mechanism
04/17/1991CN1012407B Working method of disk motor iron core and punching apparatus
04/16/1991US5007282 Stamping and forming machine having interchangeable punch sub-assembly
04/10/1991EP0421575A1 Adjustable guide for rotating cylindrical member
04/09/1991US5005455 Method and apparatus for manufacturing preform panels with preforms for repairing interconnects
04/09/1991CA1282647C Apparatus for producing a blank from stock material
04/02/1991CA2019054A1 Stamping tool
03/1991
03/27/1991EP0418779A1 Method for manufacture of workpieces by punching, in particular in a precision counter punching tool
03/26/1991US5001827 Turret punch press with a tapping function
03/21/1991WO1991003354A1 Combination punch press and laser cutting machine
03/21/1991WO1991003353A1 Combination punch press and laser cutting machine
03/21/1991WO1991003336A1 Turret punch press
03/21/1991WO1991003335A1 Turret punch press
03/21/1991CA2025685A1 Process for producing burr-free workpieces by blanking, in particular in a counterblanking tool
03/20/1991EP0417836A1 Punching machine
03/20/1991EP0417180A1 Hole punching unit
03/20/1991CN2073330U Auto-oil filler type perforating press
03/13/1991EP0416221A2 Method and apparatus for the parting and removal of pieces from punch presses
03/12/1991US4998958 Multitool punch holder
03/12/1991US4998430 Manufacture of rotor lamination for a dynamoelectric machine
03/06/1991EP0210195B1 Ball-point writing instrument containing an aqueous ink composition
03/05/1991CA2018048A1 Method and apparatus for the parting and removal of pieces from punch presses
02/1991
02/27/1991EP0414545A2 Apparatus and method for forming a tubular frame member
02/27/1991CN2071990U Intersecting line punching and shearing die for thin wall pipe
02/26/1991US4995289 Die assembly having improved insert retaining system and having reversible die inserts
02/19/1991US4993294 Punch holder with a stripper arrangement
02/16/1991WO1991002939A2 Flexible linear explosive cutting or fracturing charge
02/16/1991CA2064776A1 Flexible linear explosive cutting or fracturing charge
02/13/1991EP0412956A1 Method and apparatus for identification of punch breakings at sheet perforating tools
02/07/1991DE3925731A1 Punch press with hydraulic multi-punch head - has supply to each actuating cylinder for punch working stroke but only common supply for return
02/06/1991EP0411393A2 Method of manufacturing a contact element for a sheet connector and contact element for this sheet connector
02/06/1991CN1048993A Apparatus for and method of cutting blank
02/05/1991US4989482 Method and apparatus for punching a hole in sheet material
02/05/1991US4989440 Device for moving a tool to exact shaping or working engagement with a strip of material having a repeated basic shape
01/1991
01/30/1991EP0410573A1 An apparatus for, and a method of, cutting a blank
01/27/1991CA2020483A1 Apparatus for, and a method of, cutting a blank
01/22/1991US4986153 Method and apparatus for the parting and removal of pieces from punch presses
01/22/1991US4985973 Manufacturing method for diaphragm spring
01/16/1991EP0335939B1 Hydraulic drive system
01/16/1991CN1011206B Method punching holes in the ueneer sheet for electric appliances
01/10/1991DE3920701A1 Stamping tool for producing workpieces with bevelled edges - obviates need for subsequent grinding operation
01/09/1991EP0407039A1 Die assembly having improved insert retaining system and having reversible die inserts
01/09/1991EP0406808A1 Crankdrive for a blankfeeder at a working machine, in particular an automatic punching or bending machine
01/02/1991EP0405226A2 Non-magnetic stainless steel
01/01/1991US4981058 Punch and die set and method adapted to effect parting between adjacent sections of a workpiece
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