Progressive Cutting Patents (Class 83/689)
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Patent number: 11117179Abstract: The disclosure relates to punching tools for punching machines for punching plate-shaped materials. The punching tools have an upper tool part with an upper cutting edge and a lower tool part with a lower cutting edge that move axially with respect to each other. The upper and lower cutting edges are arranged to cut off a part of the workpiece in a punching stoke. The upper cutting edge and/or the lower cutting edge include one or more transition regions that separate the cutting edge into at least two adjacent portions. The transition regions include, in the punching direction with respect to the respective adjacent portions, a discontinuity that is adapted to cut the material cut off from the workpiece into two or more individual parts in the same punching stroke.Type: GrantFiled: June 24, 2016Date of Patent: September 14, 2021Assignee: TRUMPF Werkzeugmaschinen GmbH + Co. KGInventors: Martin Walz, Yakup Coskun, Markus Hees, Thomas Burzig, Martin Steiner
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Patent number: 8904911Abstract: A punch assembly includes a punch, a sleeve, a draw stud and a die. The sleeve adds rigidity to the draw stud, thereby reducing elastic deflection of the draw stud, reducing bending moment on the draw stud, reducing punching force, and extending the punch, draw stud and die fatigue life. The sleeve also aids in axial alignment of the punch, die and workpiece with a pilot hole drilled through a workpiece.Type: GrantFiled: December 4, 2012Date of Patent: December 9, 2014Assignee: Textron Innovations Inc.Inventor: William F. Nordlin
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Patent number: 8863626Abstract: A nibbler assembly includes a punch and a die. The die includes a through opening formed therein, which opening has an oblong configuration as viewed along a vertical direction. The die includes an upper surface including a recess extending from an upper peripheral portion of the through opening at an upstream side of a feed direction towards the upstream of the feed direction. The recess is dented downwardly relative to other portions of the upper surface. The punch includes a blade substantially matching in shape with the through opening. The blade includes an upstream end portion in the feed direction provided with opposite corners each having an arcuate shape as viewed along the vertical direction. The punch and the die are operable to punch successive holes that at least partially overlap along the feed direction so as to form an elongated hole in a sheet material.Type: GrantFiled: June 13, 2012Date of Patent: October 21, 2014Assignee: Murata Machinery, Ltd.Inventor: Kohei Matsumura
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Patent number: 8464620Abstract: A hole punch device that reduces the force required to create a hole in papers or other sheet media. A punch element of the hole punch device includes a locally sloped or indented floor to create a bend in the sheet media as it is punched to create an enlarged, oval hole. The punch pin may include an expanding sleeve surround the pin that forms a larger diameter during the cutting stroke and springs back to a smaller diameter during a pull out stroke. A coiled torsion return spring is positioned remotely from and non-coaxially with the punch pin. A keyed pin and support frame arrangement ensures a predetermined rotational orientation of the pin for sequential cutting for reduced cutting force. A long lead-in surface in the frame helps installing sheet media into the feed slot of the punch element.Type: GrantFiled: November 7, 2011Date of Patent: June 18, 2013Assignee: Worktools, Inc.Inventor: Joel S. Marks
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Publication number: 20130145915Abstract: A punch assembly includes a punch, a sleeve, a draw stud and a die. The punch has a punch profile which provides a cutting edge that has a uniform “sharpness” along entire perimeter of the punch. The punch assembly provides additional punch-to-die clearance over what was done in the prior art. This reduces excessive punching forces which result from axial deflection of the draw stud and “tipping” of a large diameter punch as the draw stud deflects under a load.Type: ApplicationFiled: December 4, 2012Publication date: June 13, 2013Applicant: Greenlee Textron Inc.Inventor: Greenlee Textron Inc.
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Patent number: 8061252Abstract: A hole punch device that reduces the force required to create a hole in papers or other sheet media. A punch element of the hole punch device includes a locally sloped or indented floor to create a bend in the sheet media as it is punched to create an enlarged, oval hole. The punch pin may include an expanding sleeve surround the pin that forms a larger diameter during the cutting stroke and springs back to a smaller diameter during a pull out stroke. A coiled torsion return spring is positioned remotely from and non-coaxially with the punch pin. A keyed pin and support frame arrangement ensures a predetermined rotational orientation of the pin for sequential cutting for reduced cutting force. A long lead-in surface in the frame helps installing sheet media into the feed slot of the punch element.Type: GrantFiled: August 7, 2007Date of Patent: November 22, 2011Assignee: Worktools, Inc.Inventor: Joel S. Marks
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Publication number: 20110011230Abstract: In a device (10) for producing a hole (62) in a sheet-shaped material (60) with a hole tool (20) and a die plate (30), the hole tool (20) is arranged at a first element (40) rotating about a first axis (A1) and the die plate (30) is arranged at a second element (50) rotating about a second axis (A2). The die plate (30) is manufactured of a hard, wear resistant, reversibly deformable material. Arranged between the second element (50) and the die plate (30) is an elastic layer (32) which has a lesser hardness than the die plate (30).Type: ApplicationFiled: July 19, 2010Publication date: January 20, 2011Inventors: Nikolaus Bernhard Bergander, Klaus-Peter Paulat
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Patent number: 7779738Abstract: A punch arrangement for punching holes in a moving web of a plastic film has a pivoted yoke mounted on a fixed bracket above the plastic film. An air cylinder or other actuator is mounted on the yoke and has a cutting head mounted on the rod of the cylinder. The cutting head is in registered alignment with an aperture on a support plate below the film. The film engages and swings the cutting head out in the film transport direction until the head rises out of contact with the film. Then a spring urges the yoke, actuator and cutting head back to their home position. A punch cycle can be carried out repeatedly on the film while the film is in constant motion.Type: GrantFiled: January 2, 2008Date of Patent: August 24, 2010Assignee: Pearl Technologies IncorporatedInventors: Earl T. Pottorff, Robert J. Tewksbury, Mark J. Clark
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Patent number: 7269989Abstract: A method of using a tool for punching orifice that has wall surfaces extending at an angle relative to a generally planar surface of a workpiece. The method includes sequentially forming two spaced apart impressions formed in the workpiece between first and second generally planar surfaces spaced apart along a longitudinal axis of the workpiece. The two spaced apart impressions form a first orifice wall surface disposed at an obtuse angle with respect to the generally planar surface facing the tool and a second orifice wall surface disposed at an acute angle with respect to the generally planar surface, and coincidental with the punching process, a retention arrangement that secures the workpiece during the forming of the orifice.Type: GrantFiled: March 24, 2004Date of Patent: September 18, 2007Assignee: Siemens VDO Automotive CorporationInventors: J. Michael Joseph, Samuel A. Gruber
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Patent number: 7228776Abstract: A Punch Assembly and the method of use thereof is disclosed. Also disclosed is. The device is designed to be accepted within the chuck of a powder-actuated tool. The device can create a hole in steel decking when the device is shot into the decking by a powder-actuated tool. The device is defined by a mandrel and a detachable punch attached to it. The outer diameter of the mandrel is greater than the outer diameter of the punch so that when the mandrel prevents the device from passing through the hole created by the punch. The punch has a generally cylindrical shape and a cutting edge forming a pair of tips on opposing sides of the cylinder in order to improve the quality of the hole formed in the decking.Type: GrantFiled: November 13, 2003Date of Patent: June 12, 2007Inventor: Gerald A. Case
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Patent number: 7162907Abstract: A punch tool for punching orifice that has wall surfaces extending at an angle relative to a generally planar surface of a workpiece. The punch tool of the preferred embodiments is provided with configurations that, at the very least, increase the life of the tool, reduce damages to the workpiece during punching in the formation of the angled orifices.Type: GrantFiled: March 24, 2004Date of Patent: January 16, 2007Assignee: Siemens VDO Automotive CorporationInventors: J. Michael Joseph, Sam Gruber
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Patent number: 6981327Abstract: A two piece punch is provided for use in a punch assembly. The punch includes a generally disc shaped cutter and a cylindrically shaped nut. The punch is assembled by passing a portion of the nut through an aperture in the cutter. The punch is mounted to the remainder of the punch assembly by fastening the nut to the draw stud. As the punch becomes worn, use of the nut continues while the cutter is removed and replaced.Type: GrantFiled: January 10, 2003Date of Patent: January 3, 2006Assignee: Greenlee Textron Inc.Inventor: William F. Nordlin
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Patent number: 6973729Abstract: A knockout punch is provided with a member such that when the punch and the die are drawn together by the draw stud to make a hole in a workpiece, the member on the punch will locate the punch assembly in a pilot hole. In three embodiments of the invention, the member is formed integrally with the punch and extends from the punch proximate to a bore in the punch which is used to connect the punch to the draw stud. In another embodiment of the invention, the member is provided as an insert which is connected to the punch within a counterbore. The punch is also provided with a pair of piercing portions for piercing through the workpiece after the member has centered the punch assembly with the pilot hole and a pair of cutting portions for shearing the workpiece after the piercing portions have pierced the workpiece.Type: GrantFiled: February 28, 2002Date of Patent: December 13, 2005Assignee: Greenlee Textron Inc.Inventor: William F. Nordlin
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Patent number: 6923103Abstract: A machine for the multi-stroke, continuous slotting of plate-shaped workpieces and especially sheet metal plates is described. A slotting tool (16) and the workpiece are movable in a forward direction relative to each other in a gate-cutting function and in at least one subsequent slot cutting stroke. This is followed by a return movement in the opposite direction (32) over a return length (A) that corresponds at a maximum to the length of the previously laterally cut slot. This is followed by a cross-cutting stroke in which the strip of material (31) that was laterally cut in the gate-cutting function and the minimum of one subsequent slotting stroke is severed at a distance from the point of its connection to the remaining workpiece. The slotting tool (16) is driven by a cam drive with a drive control, a return-drive system with a return-drive control and a forward-feed drive system with a feed-drive control.Type: GrantFiled: October 5, 2004Date of Patent: August 2, 2005Assignee: Trumpf Werkzeugmaschinen GmbH + Co KGInventor: Daniel Graf
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Patent number: 6868763Abstract: A method and machine for the multi-stroke, continuous slotting of plate-shaped workpieces and especially sheet metal plates are described. As part of a method for the continuous multi-stroke slotting of plate-shaped workpieces, a slotting tool (16) and the workpiece are moved in an advance direction relative to each other in a gate-cutting function and is at least one subsequent slot cutting stroke. This is followed by a return movement in the opposite direction (32) over a return length (A) that corresponds at a maximum to the length of the previously laterally cut slot. This is followed by a cross-cutting stroke in which the strip of material (31) that was laterally cut in the gate-cutting function and the minimum of one subsequent slotting stroke is severed at a distance from the point of its connection to the remaining workpiece.Type: GrantFiled: December 4, 2002Date of Patent: March 22, 2005Assignee: Trumpf Werkzeugmaschinen GmbH + Co. KG.Inventor: Daniel Graf
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Publication number: 20040134325Abstract: A two piece punch is provided for use in a punch assembly. The punch includes a generally disc shaped cutter and a cylindrically shaped nut. The punch is assembled by passing a portion of the nut through an aperture in the cutter. The punch is mounted to the remainder of the punch assembly by fastening the nut to the draw stud. As the punch becomes worn, use of the nut continues while the cutter is removed and replaced.Type: ApplicationFiled: January 10, 2003Publication date: July 15, 2004Inventor: William F. Nordlin
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Patent number: 6634267Abstract: Apparatus for removing fasteners (13; 63; 113; 163) from documents (12; 62; 112; 162) with a perforator (5; 55; 105; 155; 205) for perforating documents (12; 62; 112; 162) in the area of the fastener to be removed, wherein the means for separating from the set of documents (12; 62; 112; 162) the fastener to be removed (13; 63; 113; 163) are constructed as a perforator for perforating the set of documents closely along the fastener to be removed. Also disclosed is a method for removing fasteners (13; 63; 113; 163), wherein the fastener (13; 63; 113; 163) is separated from the documents (12; 62; 112; 162) simply and fast in a single operation by perforating the set of documents (12; 62; 112; 162) closely along the fastener to be removed (13; 63; 113; 163).Type: GrantFiled: October 8, 1998Date of Patent: October 21, 2003Assignee: Hadewe B.V.Inventors: Bertus Karel Edens, Jan Jacobus Peter Remijnse
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Patent number: 6606926Abstract: A method of forming a plurality of holes of fine diameter d in a brittle material at fine intervals &agr; includes the steps of forming at least two holes having a fine diameter d at intervals A in the brittle material through the use of punches. The intervals A are at least two times the fine interval &agr;. Holes are then subsequently punched between the previously punched holes at intervals A without removing the die punches used to form the previous holes. The distances between the previously punched holes and the subsequently punched holes measure at least the distance corresponding to the fine interval &agr;.Type: GrantFiled: August 18, 2000Date of Patent: August 19, 2003Assignee: NGK Insulators, Ltd.Inventors: Hiroyuki Tsuji, Kazumasa Kitamura, Yoshinori Yamaguchi
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Publication number: 20030106404Abstract: A method and machine for the multi-stroke, continuous slotting of plate-shaped workpieces and especially sheet metal plates are described. As part of a method for the continuous multi-stroke slotting of plate-shaped workpieces, a slotting tool (16) and the workpiece are moved in an advance direction relative to each other in a gate-cutting function and is at least one subsequent slot cutting stroke. This is followed by a return movement in the opposite direction (32) over a return length (A) that corresponds at a maximum to the length of the previously laterally cut slot. This is followed by a cross-cutting stroke in which the strip of material (31) that was laterally cut in the gate-cutting function and the minimum of one subsequent slotting stroke is severed at a distance from the point of its connection to the remaining workpiece.Type: ApplicationFiled: December 4, 2002Publication date: June 12, 2003Inventor: Daniel Graf
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Patent number: 6443042Abstract: An apparatus for forming notches on the edge of a slat; e.g. a wood slat. The apparatus includes a feeding station to feed a slat to a punching station that locates the slat along a longitudinal edge and a leading edge of the slat. A stripper plate positively locates the slat within the punch prior to the notches being punched. A pair of punches having a beveled region with a v-shaped cutout are used to form the lift hole notches.Type: GrantFiled: March 31, 2000Date of Patent: September 3, 2002Assignee: Newell Operating CompanyInventors: Thomas A. Caputo, Thomas Buttitta, Richard L. Scott
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Publication number: 20020108482Abstract: A perforating punch has first, second, third, and fourth tips, a first diagonal ridge contiguous to the first and second tips, a second diagonal ridge contiguous to the third and fourth tips, and an included angle setting point located at the point of intersection between the first and second diagonal ridges and positioned longitudinally of the perforating punch to bend the first and second diagonal ridges for thereby establishing included angles at the first, second, third, and fourth tips. The perforating punch allows an included angle and a shear angle thereof to be established independently for each of the four sides of a rectangular perforation to be produced, and is capable of establishing cutting conditions easily in a wide range.Type: ApplicationFiled: April 18, 2002Publication date: August 15, 2002Applicant: FUJI PHOTO FILM CO., LTD.Inventor: Yoshihisa Negishi
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Patent number: 6378409Abstract: A three hole punch system is for use in an image capturing device. The three hole punch system uses elastomeric rollers that punch holes in the edge of a sheet as it passes between two rollers. If desired, the rollers can act as a transport for the sheet without punching holes in the sheet. After the holes are punched, the resultant slugs are pushed back into the holes and the sheet is retrieved by the operator.Type: GrantFiled: January 31, 2000Date of Patent: April 30, 2002Assignee: Xerox CorporationInventors: James J. Reid, Lynn S. Gill
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Publication number: 20010042430Abstract: A perforating punch has first, second, third, and fourth tips, a first diagonal ridge contiguous to the first and second tips, a second diagonal ridge contiguous to the third and fourth tips, and an included angle setting point located at the point of intersection between the first and second diagonal ridges and positioned longitudinally of the perforating punch to bend the first and second diagonal ridges for thereby establishing included angles at the first, second, third, and fourth tips. The perforating punch allows an included angle and a shear angle thereof to be established independently for each of the four sides of a rectangular perforation to be produced, and is capable of establishing cutting conditions easily in a wide range.Type: ApplicationFiled: May 17, 1999Publication date: November 22, 2001Inventor: YOSHIHISA NEGISHI
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Patent number: 6182545Abstract: A conventional ball lock mechanism has been replaced with a wedge adapted to lock a tool, such as a punch, forming tool or die bushing in a retainer block in which the tool can be accurately positioned relative to the retainer block. The tool is released by moving the wedge away from the retainer block. The inclined surface of the wedge may be inclined upward or downward at an acute angle to the vertical, or the wedge may have both upwardly and downwardly inclined surfaces. The upper portion of the tool is preferably non-circular and is held within a tool cavity formed when the wedge is disposed in the retainer block. One surface of the wedge (its tool-mating surface) is adapted to correspond to the surface of the tool in contact with the wedge. The assembly of wedge slidably disposed within the retainer block is preferably used with a hardened backing plate rather than being secured directly to the die shoe.Type: GrantFiled: July 12, 1999Date of Patent: February 6, 2001Inventor: Francis Richard Janek, Jr.
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Patent number: 6128991Abstract: A punch and die device for working such as punching of a pipe material is disclosed, of which internal die means can easily be inserted into a pipe material even if an open end of the pipe material to be worked has burrs inward extending therefrom, and in which it is easily detected whether the internal die means is pushed toward a lateral side or lateral sides of the pipe material and thereby firmly held. The punch and die device for working a pipe material comprises: external punch means located outside a pipe material P, and internal die means K inserted in the pipe material for cooperation with a punch 30 of the external punch means to work the pipe material P; the internal die means K being divided into two parts in a direction orthogonal to that of reciprocating motion of the punch 30 of the external punch means, one 1 of the parts having working function and the other 2 having no working function, the non-working part 2 being forward and backward movable in the opening direction, i. e.Type: GrantFiled: September 1, 1998Date of Patent: October 10, 2000Assignee: Nisshinbo Industries, Inc.Inventors: Hiroshi Nakagawa, Yutaka Momota
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Patent number: 5988032Abstract: A slotting tool to slot a workpiece and cut off a slotted scrap from the workpiece comprising a punch having a toe portion and a heel portion located higher than the toe portion and a slotting portion located between the toe portion and the heel portion; a die having a starting blade to punch out a tip portion of the slotted scrap from the workpiece by cooperating with the toe portion to shear the workpiece; side blades to slot the workpiece by cooperating with the slotting portion to slot the workpiece; a terminating blade to cut off the slotted scrap by cooperating with the heel portion; a scrap cutting blade mounted to the die, the scrap cutting blade located below the starting blade for cooperating with the toe portion to cut off a tip portion of the slotted scrap; and a scrap path formed in the die, the scrap path locating under the starting blade to receive the tip portion of the slotted scrap.Type: GrantFiled: February 11, 1997Date of Patent: November 23, 1999Assignee: Amada Metrecs Company, LimitedInventor: Masayuki Seki
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Patent number: 5957024Abstract: A piercing apparatus for forming partially overlapped small holes in upper and lower layers of lining material includes upper and lower piercing stands having piercing members affixed thereto respectively. The upper and lower piercing members have engaging cut-out portions corresponding to a shape of the overlap desired between the holes. When holes are formed for a first layer of lining material, the material is positioned between upper and lower stands mounting the piecing members and the lower piercing member is driven up to cut-out the shape of the opening for the first layer except for the overlap area. Then as the lower piercing member is driven up further, the leading edge of its cut-out portion engages the trailing edge of the corresponding cut-out portion of the upper piercing member. At this time the shape of the overlap portion is cut from the first layer of lining material.Type: GrantFiled: September 18, 1995Date of Patent: September 28, 1999Assignee: Ikeda Bussan Co., Ltd.Inventor: Akira Kuwabara
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Patent number: 5730038Abstract: A punch for punching holes in a stack of sheets of paper having a V-shaped groove with a height based on the thickness of the stack and the forces necessary to drive the punch pin of the punch through the stack of paper.Type: GrantFiled: December 19, 1996Date of Patent: March 24, 1998Assignee: Acco USA, Inc.Inventors: Alfred J. Evans, Balaji Kandasamy, David Q. Feng
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Patent number: 5727436Abstract: A draw punch of the type used for cutting holes in various materials such as sheet metal has a cylindrical body with a central bore through it and a cutting edge at the outside diameter of the body. A working face is defined at one end of the body between the cutting edge and the bore. The working face includes two diametral axial faces which extend from a root to a peak. The working face further includes two valleys located between the peak of one axial face and the root of the other axial face. Primary helical surfaces extend from a peak to a valley while secondary helical surfaces extend from the valley to the root. The helical surfaces are everywhere relieved in a radial direction from a plane normal to the axis of the body and intersecting any point on the cutting edge.Type: GrantFiled: March 27, 1995Date of Patent: March 17, 1998Assignee: Ideal Industries, Inc.Inventors: Benjamin D. Swedberg, Edwin R. Burgess, III
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Patent number: 5499566Abstract: In a follow-up slotting tool for continuously punching workpiece (W) fed between a punch (3) and a die unit (5) at a predetermined pitch, the punch (3) is formed with a shear angle (.alpha.) at a lower end surface thereof in such a way that a front end of the punch is cut into the workpiece but a rear end thereof is not cut into the workpiece when lowered at a predetermined downward stroke; and the die unit (5) is provided with a counter member (15) for raising a residue (W.sub.A) partially cut away from the workpiece, after the punch has been lowered at the predetermined downward stroke, and with a cutting edge (21) for cutting off the partially cutaway residue (W.sub.A) raised by the counter member in cooperation with the punch, when the punch is lowered at the succeeding predetermined downward stroke.Type: GrantFiled: August 17, 1994Date of Patent: March 19, 1996Assignee: Amada Metrecs Company, LimitedInventors: Shigeru Endo, Fumitaka Sugizaki
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Patent number: 5243887Abstract: A punching tool for piercing a hole through the substantially parallel, spaced apart plates of a data storage disk casing uses a die which supports one of the plates and an elongated punch which pierces through the plates in succession. The disk is placed on a tray on the punch's base, and a drive lever is pushed downward to drive the punch through the casing plates. The punch is guided so that it moves along its axis of elongation and has a cutting surface at its end with a point to begin the hole in each of the plates and a trailing edge spaced apart from the point which completes the hole. The distance between the point and the trailing edge is great enough to allow the point to begin a hole in a succeeding plate before the trailing edge completes the hole in the previous plate.Type: GrantFiled: April 17, 1990Date of Patent: September 14, 1993Inventor: Nicholas J. Bonge, Jr.
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Patent number: 5235881Abstract: A piercing die including a punch and a die cooperating with each other to effect a piercing operation on a metallic workpiece sheet, the punch having an outer peripheral edge having a closed profile at a working end thereof. The outer peripheral edge of the punch has a first and a second chamfered portion which are formed such that the amount of chamfer of the first chamfered portion is larger than that of the second chamfered portion. The first and second chamfered portions are formed along large-curvature and small-curvature portions of the closed profile of the punch, respectively, and/or along acute and obtuse outer peripheral portions of the punch whose working end face is inclined with respect to the direction perpendicular to the piercing direction. A piercing method using the punch and die is also included.Type: GrantFiled: April 24, 1992Date of Patent: August 17, 1993Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kazuhiro Sano, Yutaka Suzuki, Shingo Nishimura
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Patent number: 5052207Abstract: When a blank is cut from metal sheet which suffers from crystallographic anisotropy, there is a tendency for ears to be formed during subsequent forming operations, such as drawing or pressing. In order to compensate for this tendency, there may be used a metal blank which is not completely round, but has lobes at positions to cancel at least some of the valleys between the ears. There is described a punch and die which may be used to form such a lobed blank. The punch has four circumferentially extending lobe-forming sections. Each lobe-forming section is constructed by forming a stepped recess in the cutting edge of the punch. In each lobe-forming section, the depth of the recess varies from a maximum at the middle of the section to zero at the ends. The die is conventional.Type: GrantFiled: June 26, 1990Date of Patent: October 1, 1991Assignee: CMB Foodcan plcInventor: Paul Porucznik
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Patent number: 5029392Abstract: This is concerned with a punch sometimes referred to as a draw punch which is constructed and arranged for enlarging holes in a large variety of materials, such as sheet metal, for example in junction boxes and the like where large tools cannot be used. More specifically this is concerned with a punch of the above type which is constructed and arranged to cut the metal or slug into two pieces so that they may be removed from the die without the assistance of a prying tool.Type: GrantFiled: August 8, 1990Date of Patent: July 9, 1991Assignee: Ideal Industries, Inc.Inventors: John P. Bingham, Edwin R. Burgess, III.
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Patent number: 5005458Abstract: A pocket size inexpensive punch mechanism is provided to punch openings in paper objects, the punching teeth having a configuration especially adapted to produce sharp initial penetration of the paper object, followed by smoother cutting of the remainder of the opening.Type: GrantFiled: September 22, 1989Date of Patent: April 9, 1991Assignee: Merrick Industries, IncorporatedInventor: Robert G. Merrick
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Patent number: 4974436Abstract: A cutting blade for use in a ram operated system for strategically cutting out tubing to facilitate bending thereof. The cutting blade has: first and second walls arranged in a V-shape, with each having a leading end and a trailing end; first and second substantially straight shearing edges on the leading ends of the first and second walls and residing substantially in a single plane; a planar entry surface angularly disposed with respect to the plane of the shearing edges; and an elongate, substantially straight, ridge at the apex of the V-shaped walls and defining, in conjunction with the planar entry surface, a leading tip on the cutting blade for penetrating a tubing piece.Type: GrantFiled: February 23, 1989Date of Patent: December 4, 1990Assignee: Sanko Industries LimitedInventor: Sanji Nakatsuji
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Patent number: 4930384Abstract: A die for making an incision in a workpiece by forcibly advancing the die in a linear path against a workpiece. The die consists of a body with leading and trailing ends and a cutting blade on the leading end of the body, which cutting blade has first and second spaced, wedge-shaped projections, each having an apex at its leading end, and a cutting edge between the projections and spaced in a trailing direction from the apexes of the projections.Type: GrantFiled: February 23, 1989Date of Patent: June 5, 1990Assignee: Sanko Industries LimitedInventor: Sanji Nakatsuji
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Patent number: 4905557Abstract: The punch comprises peripheral cutting edges and lateral cutting edges. The peripheral edges cut a slug in the desired shape, for examples, rectangular, square, oval, trapezoidal, D and double D-shaped, etc. while the lateral edges cut transversely from one peripheral edge to an opposite peripheral edge, thereby splitting the slug. Lateral cutting edges provide a dividing line across the working face. Surfaces and cutting edges on each side of the dividing line are similar and canted at opposite angles. Lateral cutting edges and peripheral cutting edges at their juncture provide pyramidal cutting sections which initially pierce the workpiece and initiate lateral slug splitting. This split grows from the slug periphery toward the center. Splitting is complete before a substantial portion of the slug periphery is cut.Type: GrantFiled: August 23, 1988Date of Patent: March 6, 1990Assignee: Greenlee Textron Inc.Inventor: Larry Adleman
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Patent number: 4898056Abstract: In order that holes may be produced in a simple and safe manner in a plaster plate (1) to be used as sound adjuster in a room, holes (15) are punched out of the plate, e.g. in the shape of slits, by means of a cutting tool. Hereby the considerable dust and noise inconveniences caused by the hitherto known machining are avoided. By slits (15) that must lie close to each other, it is possible to punch in two stages, i.e. first with double distance and then in the space between. This prevents fracture of the plaster and tearing of any paper that may be on the surface. The cutting tool is provided with punches (7, 8), in a shape corresponding to the holes. Each punch is provided with an inclined blade (10) which forms an angle of the horizontal of 13.degree.. The cross sectional shape of the blade is V-shaped, with two blades (11) running along the sides of the punch.Type: GrantFiled: July 29, 1988Date of Patent: February 6, 1990Assignee: Gyproc A/SInventors: Finn Grobb, Kurt Hvalso, Benni Madsen
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Patent number: 4829867Abstract: A paper punch which has a body defining a gap for insertion of the material to be punched and has at least one punch hole at the bottom of the gap and includes guides for guiding a punching element across the gap into the punch hole, also includes at least one cylindrical punching element which is disposed to be guided into the punch hole and has a cutting end with a cutting edge which extends helically along at least one-half of the circumference of the punching element. Preferably the punching element is hollow and is formed from a shaped sheet of metal.Type: GrantFiled: May 23, 1988Date of Patent: May 16, 1989Inventor: Hildaur L. Neilsen
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Patent number: 4825739Abstract: A punch system for rigid and brittle plastic sheet materials such as polycarbonates comprising a punch body mounted in a carrier board and having an upwardly projecting head portion which defines the shape of the hole to be punched, a ring of high durometer urethane mounted on the punch head to serve as a stabilizer and stripper and a disk of high durometer urethane mounted on the under surface of the press platen directly opposite the punch to receive the punch head and the slug of punched material during the punching operation. The punch is used in combination with a steel rule die but can be used either with other punches or alone.Type: GrantFiled: July 16, 1984Date of Patent: May 2, 1989Assignee: Bernal, Inc.Inventor: Douglas Pfaff
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Patent number: 4823661Abstract: A die assembly for mounting in a die press operates to punch a row of holes in a stack of paper sheets in response to a single press stroke. The die assembly comprises a stationary lower die block having a row of die holes therethrough, one or more lubricated stationary guide plates each having a row of guide holes therethrough and located above and spaced from the die block by a separator plate so as to define a stack-receiving slot, a reciprocably movable punch retainer assembly located above the guide plate and a row of elongated, downwardly-depending punches connected at their head ends to the punch retainer assembly which extend through and slidably engage the guide holes. When the press closes, the cutting ends of the punches move through the stack-receiving slot and through a stack of sheets therein into sliding engagement with the die holes. When the press opens, the punches are withdrawn clear of the stack-receiving slot.Type: GrantFiled: December 23, 1987Date of Patent: April 25, 1989Assignee: Sterling Tool Co.Inventor: Donald E. Freres
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Patent number: 4771663Abstract: To eliminate defects such as burr, rollover, sags, scar, etc. from cut-off surfaces of a workpiece in a turret punch press, for instance, a novel height-different punch formed with a lower front edge, an upper rear edge, and an intermediate edge extending between the two edges is used for the punch press. While feeding the workpiece on a horizontal plane in a predetermined direction, the punch is struck by a striker at a first stroke so that the lower front edge thereof cuts off the workpiece partially in cooperation with a die; at the succeeding strokes so that the intermediate edge thereof cuts off the workpiece mincingly and curls refuse within a recess of the die; and at the last stroke so that the upper rear edge thereof cuts curled refuse away from the workpiece to complete a multistroke punching operation.Type: GrantFiled: November 19, 1987Date of Patent: September 20, 1988Assignee: Amada Company, LimitedInventors: Kinshiro Naito, Yoshio Imamura
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Patent number: 4763552Abstract: A punch pin cutting edge configuration having a leading edge and a following edge is described. The leading edge engages a workpiece, such as paper, before the following edge. The following edge is at a steeper angle than the leading edge relative to the workpiece being punched. The cutting edge thus produced reduces the force necessary to punch through the workpiece.Type: GrantFiled: April 20, 1987Date of Patent: August 16, 1988Assignee: Acco World CorporationInventor: Willard E. Wagner
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Patent number: 4739687Abstract: The punch includes a working end with multiple working surfaces of special configuration to reduce the force required to effect punching and improve stripping action from the workpiece.Type: GrantFiled: May 27, 1986Date of Patent: April 26, 1988Inventors: Vernon Wanner, Billy J. Bauscher
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Patent number: 4723466Abstract: A self-sharpening hole punch for plastic bags includes a pneumatically operated punching apparatus for punching wicket pin receiving holes in a flexible film or plastic bag. If desired, a tear slit may be simultaneously formed to enable the bag to be quickly and readily torn free from the wicket pin upon which the bag is retained. A pneumatic air cylinder has a cylinder rod with a fitting affixed thereto, the fitting having an internal tapered thread. Interchangeable plastic cutting tools, having a complementary tapered thread, may be interchangeably screwed into the fitting to facilitate replacement as necessary. A resiliently compressible cylinder of foam plastic material is disposed in a circular void at the cutting side of each of the plastic cutting tools to expel the waste film discs that are punched out of the film or plastic bag material.Type: GrantFiled: February 10, 1986Date of Patent: February 9, 1988Inventor: Earl T. Pottorff
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Patent number: 4674373Abstract: A punch press has a punch support and die support which are rotatable about a common vertical axis, and a drive mechanism for rotating and effecting the reorientation of the tooling relative to the X and Y axes of the punch press. In this fashion, rotation of the tooling will enable reorientation of a single cutting surface, and location of various of the distinctly contoured cutting surfaces, at the desired cutting position to effect cutouts of different contour or angular orientation in a workpiece relative to the X and Y axes. The punch has a cutting portion which is of a cross section providing at least two cutting surfaces of different contours with at least at least two arcuate cutting surfaces. In accordance with one embodiment, the punch is desirably of elongated cross section with a length L along its elongated axis and a width W in its transverse axis which is less than 1/2 L.Type: GrantFiled: October 16, 1984Date of Patent: June 23, 1987Assignee: Trumpf GmbH & Co.Inventor: Rudi Kuppinger
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Patent number: 4653372Abstract: A self-sharpening hole punch for plastic bags includes a pneumatically operated punching apparatus for punching wicket pin receiving holes in a flexible film or plastic bag. If desired, a tear slit may be simultaneously formed to enable the bag to be quickly and readily torn free from the wicket pin upon which the bag is retained. The disclosed embodiment utilizes a pneumatic air cylinder having a free end of the cylinder rod having a fitting secured thereto having an internal tapered bore. Interchangeable plastic cutting tools, having a complementary tapered thread, may be interchangeably threaded into the fitting to facilitate replacement as necessary.Type: GrantFiled: June 26, 1985Date of Patent: March 31, 1987Inventor: Earl T. Pottorff
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Patent number: 4607557Abstract: A punch which includes a notching tool and a separating which are adapted to punch at least one notch and a separating gap in each effective working stroke of the punch. A separating tool is formed by at least two independently disposed separating punches which are spaced from each other by a distance which is equal to or greater than a width of a web formed between two punched notches. Likewise, the notching tool may be in the form of two independent spaced notching punches.Type: GrantFiled: August 22, 1984Date of Patent: August 26, 1986Assignee: L. Schuler GmbHInventors: Ewald Bergmann, Otto Kurz, Hans-Martin Dommer
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Patent number: RE34602Abstract: To eliminate defects such as burr, rollover, sags, scar, etc. from cut-off surfaces of a workpiece in a turret punch press, for instance, a novel height-different punch formed with a lower front edge, an upper rear edge, and an intermediate edge extending between the two edges is used for the punch press. While feeding the workpiece on a horizontal plane in a predetermined direction, the punch is struck by a striker at a first stroke so that the lower front edge thereof cuts off the workpiece partially in cooperation with a die; at the succeeding strokes so that the intermediate edge thereof cuts off the workpiece mincingly and curls refuse within a recess of the die; and at the last stroke so that the upper rear edge thereof cuts curled refuse away from the workpiece to complete a multistroke punching operation.Type: GrantFiled: September 17, 1990Date of Patent: May 10, 1994Assignee: Amada Company, Ltd.Inventors: Kinshiro Naito, Yoshio Imamura