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| Number | Title | Issue Date |
| 7578217 | Manufacturing razor blades A method of making razor blades from a strip material includes offsetting and flattening steps. ... | 08/25/2009 |
| 6397651 | Die assembly and method of manufacturing die assembly A cutting edge is formed by build-up welding on a die of a die assembly made of a base material of an aluminum/copper-based zinc alloy. The cutting edge comprises an underlying layer and an overlying layer. The underlying layer is made of a copper alloy t... | 06/04/2002 |
| 5983756 | Aperture razor system and method of manufacture A method for forming a blade having circular apertures with sharpened edges. As opposed to the traditional grinding and deburring method, the present invention utilizes electrochemical machining, electrical discharge machining, electrolytic machining, las... | 11/16/1999 |
| 5855149 | Process for producing a cutting die A process for producing a cutting die having a metal base which carries a sharpened ridge extending along a predetermined path thereon, in which a supply of powdered metal and a laser beam are moved along the path so as to surface melt a thin layer of the... | 01/05/1999 |
| 5600890 | Hair-cutting apparatus having a toothed cutting device and method of manufacturing a cutter for a toothed cutting device of such apparatus A hair-cutting apparatus has a toothed cutting device comprising a stationary cutter with a row of cutter teeth and a reciprocable cutter with a row of cutter teeth, the cutter teeth of at least one of the two cutters are rounded at their distal ends exce... | 02/11/1997 |
| 5492038 | Shaving system A shaving system of the wet shave type includes support structure and blade structure secured to the support structure. The blade structure has an aperture with an annular sharpened shaving edge that is defined by main facet portions that converge at an a... | 02/20/1996 |
| 5427000 | Cutting element, cutting edge and method of making cutting edges A cutting element, cutting edge and method of making cutting edges is disclosed. A compound material, preferably containing 30-70 vol % of carbides, nitrides and/or carbonitfides, is co-extruded with a steel cover. The co-extended product is cut into tip ... | 06/27/1995 |
| 5427001 | Method and apparatus for making external cutting member of an electric razor Method and apparatus for opening slits of uneven lengths in the concentric circular shaving sections of an external cutting member that is used in an electric razor using a rotary cutter that cuts the shaving sections of the external cutting member in rad... | 06/27/1995 |
| 5259280 | Tool with torque-transmitting working surfaces and method for the manufacture thereof A invention relates to tool having working surfaces (5) which transmit torque by application against a workpiece and are provided with particles of friction material (8) consisting of metallic or mineral material, such as quartz and/or diamond chips, atta... | 11/09/1993 |
| 5201253 | Shaving system A shaving system that includes a holder and a blade meber secured to the holder. The blade member has an aperture that defines an annular sharpened edge with main facet portions that converge at an angle of less than 30° and supplemental facet portions t... | 04/13/1993 |
| 4404835 | Tool A tool for being hammered against a piece of sheet metal or the like to form a pair of locking tabs in the sheet metal. The tool includes a body member having an anvil portion at one end for being struck with a hammer, and includes a pair of finger member... | 09/20/1983 |
| 4336640 | Cylindrical turning tool The tool for machining pneumatic tires for vehicles comprises a plurality of peripherally consecutive, segment-shaped cutter blades, which constitute a peripheral surface of the tool and are axially spaced apart and extend in planes that are transverse to... | 06/29/1982 |
| 4287648 | Tire buffing blade A bidirectional buffing blade for tire rasps with cutting and dragging teeth of the same configuration with reduced drag, improved heat transfer and cutting teeth with a substantially constant radial rake angle and land width which does not change with we... | 09/08/1981 |
| 4283820 | Segment-shaped blade A segment-shaped blade is provided for use in a rotatable cylindrical tool for machining elastic material, particularly pneumatic rubber tires for vehicles. The blade comprises pointed triangular teeth, which are provided on a convex periphery and are sta... | 08/18/1981 |
| 4283819 | Segment-shaped blade A segment-shaped blade is provided for use in a rotatable cylindrical tool for machining elastic material, particularly pneumatic rubber tires for vehicles. The blade comprises teeth defined at the convex periphery by approximately V-shaped or circular or... | 08/18/1981 |
| 4268569 | Coating underlayers A new and improved coated cemented carbide includes a cemented carbide substrate, an interlayer disposed on the substrate, and a coating of hafnium carbonitride and/or zirconium carbonitride which is firmly and adherently bonded to the substrate and inter... | 05/19/1981 |
| 4219915 | Abrading tool blades and method of making same An elongate substantially rectangular abrading tool blade, which can be used either for smoothing or for heavy stock removal, is formed of sheet metal and has a multiplicity of ground and hardened cutting teeth distributed over a cutting face of the blade... | 09/02/1980 |
| 4215473 | Cutting and abrading hand tool A cutting and abrading hand tool is provided with a blade holder of generally rectangular shape and provided on opposite external side walls with parallel longitudinally extending outwardly facing grooves. Interchangeable and disposable blades of tubular ... | 08/05/1980 |
| 4182204 | Method for making file teeth A method for making file teeth including a punch and anvil that forms part of a die set. A strip of metal is positioned on the die set so that by moving the punch into engagement with the strip of metal, a plurality of file teeth will be formed from the s... | 01/08/1980 |
| 4091516 | Tire rasp blade having multi-cutting edges The outer edge of teeth of tire buffing machine blades is interrupted by oppositely curved arcuate slots which are cupped on centers disposed below the center on which the adjacent one of the leading and trailing deeper cutting side edges of the tooth are... | 05/30/1978 |
| 4028781 | Surfacing tool A perforated abrasive metal sheet is adapted for use instead of sandpaper in a reciprocating sander.... | 06/14/1977 |
| 4021899 | Tire buffing machine blades having heat dissipation means Replaceable blades have an inner generally planar portion which is mounted between imperforate spacers of a tire buffing machine hub and an outer working edge portion which protrude beyond said spacers. Said working edge portion has spaced teeth and means... | 05/10/1977 |
| 3990134 | Sheet metal file This invention relates to sheet metal files of the type having a large number of discrete cutting edges projecting from the surface of an elongated strip of thin sheet metal forming the base of the file. In such a file, the depth of the cut by each indivi... | 11/09/1976 |
