Abstract: An improved structure of a honing apparatus includes a body, a suction unit, a control unit, a driving unit, a connecting unit and a upper cap, wherein a base is formed at circumference of the body and a trough is formed in the middle of the base, and a sliding trough is formed at one side wall on the other side of the body and a first hone is formed at a top surface of the body. At center of one lateral surface of the suction unit has an extended pulling stick and an eccentric protruding portion is formed in the control unit, while the other lateral surface has an extended manipulating portion. The driving unit has a threaded stick that has a rotating button at one enlarged end. The connecting unit has a through opening at a closer end of a lateral surface and a threaded unit is inside the connecting unit and aligned with the through opening. A second hone is hingedly formed at a top surface of the connecting unit close to the other end.

Abstract: This invention is a manual sharpening device for knife blades that creates a micro-serrated edge on the cutting edge of a knife (microscopic saw). There are two types of knife blades on the world market: plain (flat cutting surface) and serrated (undulated cutting surface, also known as saw knives). Each has a wide range of shapes and sizes for various applications. This sharpening tool allows the user to create a cutting edge on any knife that combines the effects of the plain and serrated edge and thereby expands the potential applications of any knife.

Abstract: A knife edge enhancing apparatus includes a support having a support surface and knife blade clamping structure mounted to the support and located above the support surface. An object having a knife edge modifying surface which could be abrasive or non-abrasive is mounted to a holder which is freely slidable on the support surface so that the object surface can be manually moved into contact with a knife edge facet. At least one of the clamping structure and the object surface is angularly adjustable to control the angle of contact of the object surface with the knife edge facet.

Abstract: A guide assembly for an ice skate sharpener cooperates with a template of a desired contour of a skate blade to control the relative disposition of a sharpening wheel and a skate blade. The guide assembly comprises a base and a carriage slidably mounted on the base so as to be moveable, relative to said base, along a predefined path. A support is provided for connection to a skateholder. The support is connected to the carriage to permit movement of a skateholder in a direction normal to the path. The support inhibits relative movement between the carriage and a skateholder in a direction parallel to said path. A follower connected between the skateholder and template, control movement of the skateholder in a direction normal to the path as the carriage is moved along said predefined path. The skateholder therefore follow the contour of the template.

Abstract: Apparatus and method for sharpening a tool, such as a chisel. A sharpening guide applies a clamping force to secure the tool and advances a beveled leading edge surface of the secured tool against an abrasive surface to sharpen a cutting edge while the guide is in an upright orientation. An alignment plate nestingly receives the guide in an inverted orientation to align the tool prior to sharpening. During alignment, a back surface of the tool slidingly contacts an upper plate surface and the cutting edge contactingly abuts an alignment feature which projects from the plate surface. In some embodiments, the alignment feature comprises a removable alignment pin selectively insertable into a plurality of spaced apart apertures, each providing a final bevel angle for the sharpened tool.

Abstract: A mower blade sharpening device comprising a guide body having a sharpening rod guide, a sharpening rod having a sharpener end, and an operator end. The sharpening rod is disposed in the sharpening rod guide. A sharpener is disposed on the sharpener end of the sharpening rod. Also disclosed is a method for sharpening a mower blade using the sharpening device.

Abstract: A universal blade sharpening machine is operable to securely hold and sharpen any one of multiple variously sized circular blades. The machine includes a blade-sharpening drive with an adjustable blade sharpener and also includes a universal blade holder that is rotatably powered by the drive. The blade holder includes a blade-receiving chassis that holds the blade during sharpening and is rotatable about a rotation axis of the blade holder. The chassis includes a plurality of radially spaced blade-retaining sections each associated with a respective one of the circular blades.

Abstract: An apparatus is provided for machining workpieces that, when in use, functionally cooperate with each other. The apparatus includes a frame for mounting each of the workpieces, and a machining tool mountable to the frame such that the tool is capable of defined relative movement with respect to the frame. The frame includes one or more adjustable supports for adjusting the position of the workpieces relative to the frame for operative engagement between the tool and the workpieces. The adjustable supports are fixable to maintain the position of one of the workpieces relative to the frame for machining in accordance with the defined relative movement, and the apparatus is adapted to permit the workpiece to be removed and replaced with one of the other workpieces, for machining in accordance with the defined relative movement. A method is also provided.

Abstract: Apparatus and method for sharpening a workpiece, such as a cutting tool. An abrasive disc is rotatable about a disc rotational axis and includes a plurality of spaced apart, radially disposed apertures extending therethrough from a first surface to an opposing second surface of the disc. The first surface is configured to facilitate sharpening of a workpiece by contacting engagement of the workpiece against an abrasive layer adjacent the first surface between adjacent first and second apertures of said plurality. The first surface further induces controlled axial displacement of the workpiece away from the disc as the second aperture approaches the workpiece during disc rotation. The first surface is preferably concave so as to extend into the disc between each adjacent pair of the apertures. Alternatively, the first surface is provided with different compressibilities to induce the controlled axial displacement of the workpiece.

Abstract: A sharpening machine generally includes a grinding wheel having a perimeter that is rotatable about a first axis. The sharpening machine includes an adjustment device adapted to be coupled to a structure of the sharpening machine. A shaft is mounted to the adjustment device. The shaft defines a second axis that is generally parallel to the first axis when the adjustment device is coupled to the structure. The shaft is movable along a predetermined feed axis toward the grinding wheel. A carousel is rotatably connected to the shaft of the adjustment device. A contouring tool is rotatably connected to the carousel. The contouring tool has a contour surface. Movement of the shaft of the adjustment device along the feed axis is configured to translate the carousel and move the contouring tool into and out of engagement with the grinding wheel to facilitate dressing of the perimeter of the grinding wheel to a grinding wheel contour.

Abstract: A knife sharpening device of a circular knife contains a wheel member including a sharpening portion disposed therein, the sharpening portion including an abrasive piece mounted therearound, an annular loop with a hole mounted on a central portion thereof, and a peripheral wheel formed therearound; a retaining member connected with one side of the wheel member and including a first rib disposed thereon, an abutting post with a first limiting block extending therefrom, the first limiting block including an insertion extending therefrom, the abutting post including a biasing projection proximate to the abutting post; a connecting member connected on another side of the wheel member and including a second rib disposed thereon, a second limiting block with an opening and plural locking tabs fixed on a central portion of an inner side thereof, the connecting member including a contacting peg arranged adjacent to an inner side thereof.

Abstract: An apparatus for sharpening a knife comprising a clamping mechanism for holding the knife and a base rod mounted adjacent and perpendicular to said clamping mechanism. Two sharpening blocks are located on either side of the clamping mechanism and are slidably mounted on guide rods extending vertically from the base rod. The guide rods are movably fixed to any point along the base rod and can be moved about the selected point in two directional planes that are perpendicular to each other.

Abstract: A grinding head of a grinder is provided with a knife assembly that includes a knife holder with a number of arms, each having a knife insert slot, for receiving a matching number of knife inserts. The knife inserts have a blade or cutting edge and a bottom edge. The bottom edge, rather than being a straight edge, is shaped to define a pair of bearing portions that fit within the slot of the knife holder arm and allow the knife insert to be firmly retained in the slot. A recessed area is located between the bearing portions. The recessed area accommodates any imperfections in the floor of the insert slot, and provides a void area within which any material contained within the slot can be received when the knife insert is engaged within the slot.

Abstract: The present invention is related to a method for manufacturing a blade body of a nail clipper having a 3-dimensional inclined curve-type blade, including steps of forming an inclined curve with a curvature Ra using a boundary line which is formed when the periphery of grinding media with a radius Rg in an upright position is merged with an upper inclined surface having a predetermined angle ?1 with respect to a vertical line, forming a lower inclined surface by extending the inclined curve downward at an angle ?2 corresponding to the angle ?1, forming blade bodies using the upper and lower inclined surfaces to be inner inclined surfaces of the blade bodies, and grinding the ends of the upper and lower inclined surfaces simultaneously via grinding media with the radius Rg, whereby forming upper and lower 3-dimensional inclined curve-type blades with the curvature Ra, respectively.

Abstract: Apparatus, systems and methods in accordance with the present invention are related to sharpening blades for rotary cutters. In one illustrative embodiment of a system in accordance with the present invention, an elongated sharpening stone is held at a desired angle between underlying support structures on a base and a securing cap. A planar edge of the stone is exposed in an adjustable channel between the stone and a slidably adjustable sidewall. The angle of the sharpening stone corresponds to correct angle for a sharpened edge on a rotary blade disposed on a hand held rotary cutter, which is inserted into the channel. By advancing the cutter through the channel an edge of the rotary blade may be honed and/or sharpened.

Abstract: A system for sharpening circular, knife edged blades operates to bias an infeed grinding wheel into contact with the first edge of the blade and an outfeed grinding wheel into contact with the second edge of the blade. The grinding wheels are spaced so that they contact the respective edges of the blade at a point which is spaced by no more than 1 inch from the center line of the blade. Contact between the grinding wheels and the blade is accomplished solely by pushing the wheels from their sides which are opposite the blade contacting surface. The system includes provisions for adjusting the position of the wheels relative to the blade so as to accommodate blade wear.

Abstract: An automated knife sharpening and cleaning system is provided. The system comprises a container body that is configured to hold a utensil holder that is configured to releasably couple to the container body, the utensil holder configured to hold a utensil. The system further includes a drive assembly and a gripper assembly, the gripper assembly being coupled to the drive assembly and the drive assembly being configured to move the gripper assembly within the three-dimensional coordinate space of the container body. The system further includes a grinding assembly that is configured to sharpen the utensil. During operation of the system, the gripper assembly is configured to grip the utensil and remove the utensil from the utensil holder, hold the utensil within the grinding assembly during sharpening, and replace and release the utensil in the utensil holder once the sharpening is complete. Moreover, the system may clean and sanitize the utensil.

Abstract: A device for sharpening a tool blade has a pair of spaced guide rails and a bracket for mounting a sharpening stone on the guide rails. A carriage is slidably supported on the guide rails and has a pair of spaced slide plates adjustably supporting a blade angle plate thereon. A clamp mechanism secures the tool blade on the angle plate which is secured in an adjusted position for forming a primary angle on the blade cutting edge by reciprocal movement of the carriage along the guide rails. The angle plate and attached tool blade are readjusted on the carriage for subsequently forming a secondary angle on the cutting edge of the tool blade. Printed indicia adjacent a plurality of adjustment holes formed in the slide plates set the primary and secondary angles of the cutting edge. Mating surfaces on the carriage and guide rails set the amount of material to be removed from the blade during reciprocal movement along an abrasive sharpening material.

Abstract: A method of producing a doctor blade from a band. A grinding wheel is positioned above the band with its axis of rotation not at right angles to the edge of the doctor blade. The grinding wheel then is rotated and the band is moved beneath the grinding wheel parallel to its edge.

Abstract: The competitive and technological evolution of sports with ice skates such as ice hockey, speed skating, and figure skating as well as the conditioning and training of these athletes places increased demands on their equipment. Amongst these are the ability to vary the blade profile at different points to increase speed, agility, acceleration, etc according to the sport and the athlete's personal preferences. In many instances matching left and right blades is also important. In contrast in amateur sports where users access retail skate sharpening services speed or service and cost of service is important. A system and method are taught for simultaneously profiling both blades of user for increasing speed and reducing cost in retail environments whilst aligning there profiles in more professional applications. The method further allows for profiles to vary in cross-section along the length of the blade.

Abstract: Apparatus, systems and methods related to sharpening blades for rotary cutters. In one illustrative embodiment, a power sharpener system secures a rotary cutting blade between upper and lower columns that form a rotating axle in contact with upper and lower sharpening stones, each positioned at an appropriate angle to contact a cutting edges of the rotary blade for sharpening. The upper column may be rotatably attached to an upper cover or lid and the lower column rotatably disposed in a base. After the rotary blade is secured, an electric motor is used to rotate the column, contacting the edges of the blade against the stones to simultaneously sharpen both edges of the blade. In some embodiments, a retractable plate may be disposed around the lower column for placement of the rotary blade thereon and a lifting lever may be used to facilitate blade removal.

Abstract: The invention provides a blade sharpening device designed for sharpening a blade for a uniform sharpening of the edge thereof. Generally, the blade sharpening device includes a base, a guide, a carriage, and a blade holder. The blade holder secures the blade while being sharpened. The blade holder is connected to the guide which is movable relative to the base. The base includes a material that receives an impression of a blade to define a blade contour and a grinding medium which provides an abrasive surface. The carriage interacts with the guide to define a sharpening path substantially aligning with the blade contour. The carriage and the guide direct the movement of the abrasive surface along the contour of the blade for a uniform sharpening of the edge thereof.

Abstract: Apparatus, systems and methods in accordance with the present invention are related to sharpening blades for rotary cutters. In one illustrative embodiment of a system in accordance with the present invention, an elongated sharpening stone is held at a desired angle between underlying support structures on a base and a securing cap. A planar edge of the stone is exposed in an adjustable channel between the stone and a slidably adjustable sidewall. The angle of the sharpening stone corresponds to correct angle for a sharpened edge on a rotary blade disposed on a hand held rotary cutter, which is inserted into the channel. By advancing the cutter through the channel an edge of the rotary blade may be honed and/or sharpened.

Abstract: A device and method of sharpening hair cutting scissor blades passes a blade over the perimeter portion of a flexible sharpening pad to flex the perimeter portion out of the plane of the pad. The blade is held in an angled orientation over the pad and is moved horizontally and downward during the sharpening motion. Independent horizontal and vertical movements allow addressing irregularly shaped blades including blades with a radial shape and convex blades.

Abstract: Cutting elements for downhole cutting tools comprise a top surface having a cutting surface portion and a cutting profile disposed across the top surface. The cutting elements comprise first and second longitudinal side surfaces and first and second lateral side surfaces, each having a respective cross-section. The cutting profile can be disposed on the cutting surface either asymmetrically or symmetrically. Asymmetrical disposition permits two cutting elements to be arranged facing each other to cover a center point of a cutting tool. The cutting edge of asymmetrical or symmetrically disposed cutting profiles can have a shape that facilitates self-sharpening during cutting.

Abstract: A formed cutter 1 has on its tip side a blade 2 having a spiral cutting part 6 and a spiral flute 8 alternately disposed and rotating around a rotation axis O to perform cutting. The formed cutter 1 is manufactured by forming a depression 6B and a projection 6A with different diameters on a blade forming part 12, forming the spiral flute 8 on the blade forming part 12, and forming a rake face 4 on a side fall of the spiral flute 8 by bringing the grinding tool 18 in line contact with the side wall of the spiral flute 8 along a depth direction of the flute 8 while rotating the grinding tool 18 around its axial center.

Abstract: Granulator blades with a high wear resistance made of cold work tool steel, preferably with a high vanadium content and thermally treated after machining, at a temperature ranging from 500° C. to 700° C. The sharpening of the blades is effected by abrading the blades against the surface of the die plate, under suitable operating conditions.

Abstract: A device for sharpening razor blades, comprising, a housing having an upper casing and a lower casing defining an interior space, the upper casing having an opening, and a lid to cover the opening, a reciprocating carriage disposed in the lower case below the opening for receiving a razor blade unit containing a razor blade with a shaving edge facing downward, a sharpening wheel coated on its outer circumference with an abrasive material fixedly disposed in the lower case for rotation around an axis beneath and simultaneously with the reciprocating carriage, mechanism to reciprocate the carriage, mechanism to rotate the sharpening wheel, power supply to operate the reciprocating and rotating mechanisms, a switch to activate the device to reciprocate the carriage and rotate the sharpening wheel simultaneously, such that when the razor blade unit with the razor blade is inserted through the opening into the carriage and the power is turned on by the switch the sharpening wheel rotates and the carriage holding t

Abstract: A mower blade sharpening device comprising a guide body having a sharpening rod guide, a sharpening rod having a sharpener end, and an operator end. The sharpening rod is disposed in the sharpening rod guide. A sharpener is disposed on the sharpener end of the sharpening rod. Also disclosed is a method for sharpening a mower blade using the sharpening device.

Abstract: A motorized knife sharpener and related methods of sharpening knives, wherein the knife sharpener is capable of sharpening knives of varying types and styles. The motorized knife sharpener includes a housing, motorized grinding assembly and an adjustable blade guide assembly. The adjustable blade guide assembly includes a selector switch accessible to a user on a front portion of the housing. With the selector switch, the user is able to selectively adjust a presentation angle defined by a blade guide relative to a grinding wheel. The selector switch is operably coupled to the blade guide with a cam assembly that pivots the blade guide with respect to the grinding wheel so as to vary the blade presentation angle.

Abstract: A method for sharpening a wood working knife having opposed cutting edges, wherein the knife body is held by clamping features on a first surface of the knife and the opposed edges are simultaneously sharpened.

Abstract: A blade, such as the blade of a precision shear, having a cutting angle which changes progressively along the length of the blade through a predetermined angular measure is sharpened by coupling the blade with an articulated arm assembly through a drive mechanism which rotates the blade about a longitudinal direction in response to movement of the blade along the longitudinal direction, as the blade is drawn across a sharpening surface. The drive mechanism includes a cam and follower for rotating the blade through an angular displacement corresponding to the predetermined angular measure of the change in the cutting angle so as to preserve the changing cutting angle. The drive mechanism is selectively uncoupled to permit free manual rotation of the blade as the blade is drawn across the sharpening surface for finishing the blade subsequent to the sharpening operation. The drive mechanism accommodates blades of both right-handed shears and left-handed shears.

Abstract: Method (300) and apparatus (100) for sharpening a cutting tool (114, 132, 204, 210, 216). A flexible abrasive belt (116, 116A, 116B, 162, 172) with a selected linear stiffness and an abrasive surface (128A, 128B) of selected abrasiveness level is driven (304) in a selected direction along a selected plane between a first support (122) and a second support (118). In some embodiments, the cutting tool is presented (306, 308) in contacting engagement against the abrasive surface to induce torsion of the belt (140, 144, 148) out of the selected plane to conform to a cutting edge (138, 168,178,207, 208, 213, 214, 215) of the cutting tool. In further embodiments, presentation of the cutting tool against the abrasive surface of the belt (306, 308) induces bending of the belt out of said selected plane at a radius of curvature (169, 179) determined in relation to said linear stiffness to shape a side surface (164, 166, 174, 176) of the cutting tool with said radius of curvature.

Abstract: A ice skate blade sharpening machine comprises a skate holder which holds the blade in a releasably fixed position, a rotatable grinding wheel having a periphery and rotatable about a grinding wheel axis, and a contouring tool having a contour surface, moveable between an engaged position and a disengaged position, wherein in the engaged position the contouring tool is held in place with respect to the grinding wheel axis, the contour surface engages the rotating grinding wheel and grinds the periphery of the grinding wheel to define a grinding wheel contour, and wherein the grinding wheel contour grinds the blade to define a profile when the grinding wheel is rotating and the blade is held in the releasably fixed position.

Abstract: Apparatus, systems and methods in accordance with the present invention are related to sharpening blades for rotary cutters. In one illustrative embodiment of a system in accordance with the present invention, an elongated sharpening stone is held at a desired angle between underlying support structures on a base and a securing cap. A planar edge of the stone is exposed in an adjustable channel between the stone and a slidably adjustable sidewall. The angle of the sharpening stone corresponds to correct angle for a sharpened edge on a rotary blade disposed on a hand held rotary cutter, which is inserted into the channel. By advancing the cutter through the channel an edge of the rotary blade may be honed and/or sharpened.

Abstract: A method and apparatus for sharpening clockwise rotating standard blades, counter-clockwise rotating standard blades and mulching style blades of either clockwise or counter-clockwise rotation is provided. The present invention comprises a base with a blade fixture which is reversible to accommodate both clockwise and counter-clockwise rotating blades. Uprights, a slide shaft, a slide bushing and a handle shaft connected to a disc grinder provide a means for setting a primary cutting angle for sharpening the primary cutting edges of a blade. An adjusting wheel rotatable attached to the handle shaft and pivotably coupled to the disc grinder provide a means for quickly and easily adjusting the cutting angle in order to accommodate sharpening the secondary cutting edges of a mulching style blade and returning the disc grinder back to its original cutting angle.

Abstract: A system for sharpening and or honing a multi-bladed razor cartridge including a handle and flexible honing material. The flexible honing material is used to hone the razor blades prior to use and to remove excess moisture from the razor blades once the razor blades are cleaned after shaving. The flexible honing material is made of a chamois which can conform to the shape of the razor blade cartridge and razor blades within the cartridge.

Abstract: A blade-sharpening machine for sharpening any one of various sizes of rotary blades comprises a drive unit and a universal blade chuck for holding the blade to be sharpened. The drive unit further includes a sharpening assembly that sharpens the blade while the drive unit rotates the blade chuck. The blade chuck includes a chassis and jaws that are circumferentially spaced about the chassis and are shiftably attached thereto for securing the rotary blade. A spring-loaded fastener normally urges the jaws radially inwardly into engagement with the blade. A centrally-positioned cam is operable to shift the jaws simultaneously so that the blade can be selectively secured on the blade chuck.

Abstract: A sharpener for creating cross-grind knife edges includes a nominally flat annular abrasive sharpening member which could be a ring or a disk and is rotated about its center and held against a moving knife edge facet to simultaneously and sequentially abrade the knife edge at multiple locations on the abrasive member. The disk may be slidably mounted on a shaft in opposition to a spring restraining force. The disk is nominally disposed in a vertical orientation. The sharpener may include multiple stages including a manual stage having a pair of off axis conical shaped rotatable abrasive coated disks which have abrading lines on opposing facets which are not parallel but cross and intersect in a crossing pattern at the blade edge.

Abstract: A sharpening guide assembly to be removably attached to a sharpening stone to provide for smooth, controlled and accurate motion when sharpening a blade is provided. The assembly includes a body portion forming a platform adapted to receive the sharpening tool. A magnet is disposed within a recess formed in the platform. The magnet aids in removably attaching the sharpening tool to the guide assembly. The body portion includes guide rails to stabilize and aid in the attachment of the sharpening tool to the guide assembly. A guide rod is affixed to the body portion. The sharpening guide assembly may be used with a sharpening tool including metal and having a substantially planar sharpening surface. A clamping device for holding a blade to be sharpened is slidably coupled to the guide rod of the assembly and is drawn back and forth along the guide rod for sharpening the blade.

Abstract: The present invention is directed to an automatic rotation knife sharpener where the crossed sharpening rods are automatically rotated each time a knife is passed down and through the sharpener. The rotation is derived through the means of a spring steel actuator mechanism making contact with the cogwheels of the sharpening rod holders. Magnets retain the sharpening rods in place within the sharpening rod holders. Sharpening rods may be easily removed and stored in troughs on the upper surface of the protective cover. A variety of sharpening rods with different abrasive surfaces can be easily exchanged in the device.

Abstract: A knife grinder comprises a housing, wherein a grinding mechanism is arranged. A magnetic body is arranged under the grinding mechanism to attract metal scraps. Since the magnetic body is arranged under the opening, the knife grinder allows the metal scraps to be fully attracted to the bottom of the housing, thereby maintaining a clean environment during the grinding process.

Abstract: A treatment device for improving the cutting properties of the blade of a non-electric shaving razor. The device has a treatment surface for interacting with the cutting edge of the razor blade, as the blade is put into sliding contact with the treatment surface. The treatment surface has a plurality of resilient honing projections that are compressed as the blade is moved in sliding contact with the surface.

Abstract: A device and method of sharpening hair cutting scissor blades passes a blade over the perimeter portion of a flexible sharpening pad to flex the perimeter portion out of the plane of the pad. The blade is held in an angled orientation over the pad and is moved horizontally and downward during the sharpening motion. Independent horizontal and vertical movements allow addressing irregularly shaped blades including blades with a radial shape and convex blades.

Abstract: A method for sharpening a wood working knife having opposed cutting edges, wherein the knife body is held by clamping features on a first surface of the knife and the opposed edges are simultaneously sharpened.

Abstract: The invention relates to a chipper knife of the type that is adapted to be mounted in chippers which have a rotatable tool, in the form of a disc, drum or frustoconical member, on which are mounted a plurality of such chipper knives to provide, during rotation of the tool and simultaneous feeding of pieces of wood to the same, material-cutting working or disintegrating of the pieces of wood into chips by means of at least one cutting edge (1, 1?). At least a first side of the chipper knife has a raw, unworked surface or working stripes in the longitudinal direction of the chipper knife, that is substantially parallel to the cutting edge. This first side also has a thickened cutting edge portion (5, 5?) in the area next to the cutting edge, which edge portion has working stripes in the transverse direction of the chipper knife, at an angle to the cutting edge. The invention also relates to a method of manufacturing such a chipper knife.

Abstract: A motorized knife sharpener includes means of for sharpening heavy, medium, and fine blades at angles appropriate to the cutting edges of such blades.

Abstract: A dressing device for sharpening or conditioning of a blade or the like includes one or more disk pairs each having a pair of disks respectively presenting a plurality of ribs. The disks are oriented in face-to-face relationship with the ribs thereof in meshed, intercalated relationship to thereby create circumferential dressing openings. The ribs are configured to create sharpened edge on a knife blade or the like.

Abstract: A knife sharpener is provided which is capable of precision sharpening of hunting and similar knives that have a first and second blade face, each of which terminates at a facet that meets the corresponding facet to create the knife edge. At least the first of the blade faces has a lower distinct planar or concave section adjacent the edge facet with the lower planar or concave section of the face being set at an angle to the center line of the blade thickness that is different from the angle of the adjoining upper section of the same blade face located adjacent to the back of the blade. The sharpener includes a sharpening member such as one having an abrasive coated surface. The sharpener also includes a planar angle knife guide surface of a knife guide which is designed for intimate sliding and sustaining contact with the second face of the blade in order to position an edge facet on the first of the faces into precise angular relation with the sharpening surface.

Abstract: Apparatus, kits, and methods for sharpening electric shavers having rotary and reciprocating-type cutting members are disclosed. A sharpening apparatus in accordance with an exemplary embodiment of the present invention may include an applicator tray or other applicator means, and an abrasive material configured to abrade and sharpen the cutting surfaces of the electric shaver, when actuated.