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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 7269989 | Method of using a tool to form angled orifices in a metering orifice disc 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 g... | 09/18/2007 |
| 7228776 | Punch assembly 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-actua... | 06/12/2007 |
| 7162907 | Punch tool for angled orifice 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, ... | 01/16/2007 |
| 6981327 | Two piece punch with pilot hole locator 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 remaind... | 01/03/2006 |
| 6973729 | Knockout punch with pilot hole locator 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 memb... | 12/13/2005 |
| 6923103 | Machine for the continuous multi-stroke slotting of plate-shaped workpieces 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 a... | 08/02/2005 |
| 6868763 | Method and machine for the continuous multi-stroke slotting of plate-shaped workpieces 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 wo... | 03/22/2005 |
| 6634267 | Apparatus and method for removing fasteners from documents 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 th... | 10/21/2003 |
| 6606926 | Method for punching brittle material and punching die to be used therefor A method of forming a plurality of holes of fine diameter d in a brittle material at fine intervals 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 in... | 08/19/2003 |
| 6443042 | Method and apparatus for manufacturing a wood blind 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 positi... | 09/03/2002 |
| 6378409 | Replaceable hole punch for image capturing devices 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 ... | 04/30/2002 |
| 6182545 | Wedge-lockable removable punch and die bushing in retainer 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 ... | 02/06/2001 |
| 6128991 | Punch and die device for working pipe 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... | 10/10/2000 |
| 5988032 | Slotting tool 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; ... | 11/23/1999 |
| 5957024 | Piercing apparatus for lining material 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 engagin... | 09/28/1999 |
| 5730038 | Configuration for paper punch pin 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.... | 03/24/1998 |
| 5727436 | Draw punch having relieved helical working faces 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... | 03/17/1998 |
| 5499566 | Follow-up slotting tool 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 () at a lower end surface thereof in such a way that a front end of... | 03/19/1996 |
| 5243887 | Disk casing punch tool and method 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... | 09/14/1993 |
| 5235881 | Piercing die whose punch has different amounts of chamfer at different outer peripheral edge portions 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 t... | 08/17/1993 |
| 5052207 | Apparatus for, and a method of, cutting a blank 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... | 10/01/1991 |
| 5029392 | Two point punch 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. M... | 07/09/1991 |
| 5005458 | Low cost punch mechanism 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 ... | 04/09/1991 |
| 4974436 | Cutting tool to facilitate bending of hollow tubing 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 s... | 12/04/1990 |
| 4930384 | Die for notching hollow tubing 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... | 06/05/1990 |
| 4905557 | Non-circular slug splitter punch 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 o... | 03/06/1990 |
| 4898056 | Method and tool for punching plaster plates 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 an... | 02/06/1990 |
| 4829867 | Paper punch apparatus with improved punch element 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 leas... | 05/16/1989 |
| 4825739 | Punch system for perforating plastic sheets 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 duromet... | 05/02/1989 |
| 4823661 | Die assembly for punching holes in paper 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 lubric... | 04/25/1989 |
| 4771663 | Multistroke punching method and apparatus therefor 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... | 09/20/1988 |
| 4763552 | Punch pin configuration 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 ... | 08/16/1988 |
| 4739687 | Punch 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.... | 04/26/1988 |
| 4723466 | Self-sharpening hole punch for packaging with resilient waste expelling mechanism 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 quic... | 02/09/1988 |
| 4674373 | Method and apparatus for nibbling cutouts by rotation of tooling with cutting surfaces of different contours and tooling therefor 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, rotatio... | 06/23/1987 |
| 4653372 | Self-sharpening hole punch for plastic bags 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 quic... | 03/31/1987 |
| 4607557 | Punch 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... | 08/26/1986 |
| 4491261 | Hand-operated stapler-punch combination A working combination of a stapler assembly (10) for fastening together sheets of paper or the like with U-shaped wire staples (S) one at a time and a punch assembly (12) capable of simultaneously perforating two holes. The stapler assembly is per se of c... | 01/01/1985 |
| 4446621 | Fabric repairing tool with cylindrical sheet metal cutter A fabric repairing tool is provided with a cylindrical sheet metal cutter having a helically extending sharp cutting edge. The cutter is affixed to an arbor which moves the cutter into a die mounted within a stationary sleeve wherein the arbor is slidably... | 05/08/1984 |
| 4428709 | De-packaging apparatus This invention is in the field of automatic machinery and in one embodiment useful for removing the contents of "blister" packages in ribbon form, comprises a group of three in-line die blocks, which move together in a square motion, having a lateral dist... | 01/31/1984 |
