Abstract: A blade sharpener for manual use includes a base, and at least one sharpening device pivotally attached to the base. Each sharpening device has a channel for receiving a blade to be sharpened. A second pivotally attached device may be sharpening device or a guide. The two devices are pivotable independently of each other thereby accommodating any curvature of a blade to be sharpened as the blade sharpener is moved along the blade. A blade sharpener for use with a powered rotary tool includes a main body having a bore for receiving the powered rotary tool, and a channel for receiving a blade to be sharpened. A guide having a channel is pivotably attached to the main body to accommodate any curvature of a blade.

Abstract: A blade sharpness detection system for determining a sharpness of a blade without mechanical contact with the cutting edge of the blade. An optical inspection unit is operative to inspect blade sharpness optically, and a blade positioning and guidance mechanism is disposed to position and guide the blade in relation to the optical inspection unit. An output display is operative to provide a visual output of the sharpness of the blade. The optical inspection unit, which can be a reflective optical sensor, and the blade positioning and guidance mechanism are retained by a pivotable support structure. The positioning and guidance mechanism can be formed by first and second pairs of rotatable spheres, each pair of rotatable spheres disposed in immediate juxtaposition to act as rolling supports for the blade.

Abstract: A sharpening device, components thereof, and associated methods. The sharpening device includes a sharpening assembly and a housing. The sharpening assembly is selectively receivable in the housing in a stowed configuration and supportable by the housing in an operational configuration to support the sharpening assembly for sharpening a blade. The sharpening assembly can include first and second arms having respective abrasive sharpening surfaces pivotable away from each other about a pivot connection.

Abstract: Systems, devices, and methods for providing different types of sharpeners for knives with a removable angle gauge to determine which knife sharpener to use for individual knives. The sharpener can include three angle sizes of honing ceramic dual wheel sharpeners, three angle sizes of edge shaving diamond coated dual wheel sharpeners, and three angle sizes of new edge blade tungsten rod sharpeners. One angle size can cover approximately 13 degrees to approximately 15 degrees, and include 14 degrees. An angle size can cover approximately 16 degrees to approximately 18 degrees and include 17 degrees. And a third angle size can cover approximately 19 degrees to approximately 21 degrees and include 20 degrees.

Abstract: Systems, devices, and methods for providing different types of sharpeners for knives with a removable angle gauge to determine which knife sharpener to use for individual knives. The sharpener can include three angle sizes of honing ceramic dual wheel sharpeners, three angle sizes of edge shaving diamond coated dual wheel sharpeners, and three angle sizes of new edge blade tungsten rod sharpeners. One angle size can cover approximately 13 degrees to approximately 15 degrees, and include 14 degrees. An angle size can cover approximately 16 degrees to approximately 18 degrees and include 17 degrees. And a third angle size can cover approximately 19 degrees to approximately 21 degrees and include 20 degrees.

Abstract: A portable tool sharpener adapted for mounting on a rail such as may be found on various weapons includes a sharpener body in which a plurality of sharpening tools are mounted and a rail-mounting base pivotally mounted to the sharpener body to allow the body to moved selectively to a closed and open position, wherein the rail-mounting base is releasably engageable with a rail mounted on a weapon, a handle or a fixed pad.

Abstract: Conditioning devices for conditioning blades are provided. A conditioning device includes a first rod and a second rod, at least one of the first rod and the second rod rotatable about an axis, the first rod and the second rod oriented to define a blade conditioning zone therebetween, the blade conditioning zone being defined by a blade conditioning angle between the first rod and the second rod. The conditioning device further includes a stationary magnet and a movable magnet. The movable magnet is connected to the one of the first rod and the second rod and rotatable about the axis. The movable magnet has an opposite magnetic orientation relative to the stationary magnet. Rotation of the one of the first rod and the second rod adjusts the blade conditioning angle.

Abstract: A knife sharpening sheath has an open end for receiving a knife, and which open end also includes provision for receiving and securing a knife sharpening cartridge. The sheath includes openings in opposing sides and the knife sharpening cartridge includes rearwardly extending legs configured to be received by, and secured into said openings in the opposing sides.

Abstract: A cutlery sharpener is disclosed for conditioning a cutlery edge. The cutlery sharpener comprises a sharpening shaft extending between a proximal end and a distal end and defining a sharpening surface for engaging the cutlery edge. A line of symmetry extends through the proximal end and the distal end of the sharpening shaft. A handle extends between a proximal end and a distal end and defining a handle surface for engaging a hand. A non-line of symmetry extends through the proximal end and the distal end of the handle. A couple links the proximal end of the sharpening shaft with the proximal end of the handle. The non-line of symmetry maintains a thumb and a plurality of fingers of the hand in a safe orientation and safe distance from the cutlery edge during displacement of the handle relative to the cutlery edge and engagement between the cutlery edge and the sharpening shaft.

Abstract: A multi-angle blade sharpener is provided which includes a support plate having a plurality of a pair of bores extending downwardly into the support plate with each pair of bores extending downwardly into the support plate at different angles. First and second sharpening stone holders having a sharpening stone secured thereto are also provided with each of the holders having a stud extending downwardly therefrom for insertion to the pairs of bores. A storage box is also provided for storing the components of the sharpener with the support plate serving as a cover for the box.

Abstract: Conditioning devices for conditioning blades are provided. A conditioning device includes a first rod and a second rod, at least one of the first rod and the second rod rotatable about an axis, the first rod and the second rod oriented to define a blade conditioning zone therebetween, the blade conditioning zone being defined by a blade conditioning angle between the first rod and the second rod. The conditioning device further includes a stationary magnet and a movable magnet. The movable magnet is connected to the one of the first rod and the second rod and rotatable about the axis. The movable magnet has an opposite magnetic orientation relative to the stationary magnet. Rotation of the one of the first rod and the second rod adjusts the blade conditioning angle.

Abstract: An adjustable manual abrasive sharpener having a pair of sharpening slots formed in a frame with opposing abrasive arms being pivotally mounted in each of the sharpening slots. A rod is mounted on the frame for rotatable motion and for linear motion long its axis of rotation from a position at which the rod is locked against rotation to a depressed position whereby the rod may be rotated. The bottom end portion of the rod includes a pinion gear which engages a pair of gear racks which are mounted for movement laterally relative to the axis of rotation of the rod. The pair of gear racks respectively engage slots formed on the bottom of the abrasive arms in each sharpening slot. Rotation of the rod causes movement of the gear racks to adjust each pair of abrasive arms with respect to each other to vary the sharpening angle of the abrasive elements.

Abstract: A sharpening device 1 for knife blades comprising a base plate 2 with a guiding slot 6, designed as an incision in the base plate 2, for a knife blade to be sharpened and sharpening rods 10a, 10b disposed on both sides of the guiding slot 6 to be pivotable against an elastically resilient restoring force, wherein the guiding rods 10a, 10b intersect at a point of intersection 11 in the area of the guiding slot 6. At least one of the two walls of the base plate 2, which are disposed opposite to each other and form the guiding slot 6, thereby forms a knife abutment surface 7a, 7b and at least one magnet 20, 21, 22 is mounted to the base plate 2 in the area of the knife abutment surface 7a, 7b.

Abstract: The invention relates to a device (1) for sharpening the blade of a manual cutting tool, in particular a knife. The inventive device comprises a support (2) provided with a cutout (4). Identical sharpening levers are arranged on each side of the cutout in front and in staggering manner with respect to each other and provided with a curved arm (13) having a rectilinear end edge (14) and another arm (16) forming means for returning in a position by gravity. Each lever (11) is pivotally mounted in the jointing area (15) of the arms (13, 16) around an geometrical axis which is generally perpendicular to a longitudinal direction (A-A?) of the cutout and a slot (5). Said device is particularly adapter to the agriculture and food industry.

Abstract: A blade sharpening tool adapted for hand-held use, comprising two mating housing components and two bits wherein the bits can be of tungsten carbide material. Each mating housing component can comprise a plurality of integrated fastening elements. The mating housing components can be secured together by engaging integrated fastening elements, thereby securing the bits. The bits can thereby form a specified gap angle favorable for a blade-sharpening process. The integrated fastening elements can be of a snap fit cantilever beam design. Alignment posts can extend into and/or through the bits.

Abstract: A tool for polishing knife's edges, the tool (1) comprising two oppositely positioned and co-rotating rings of elongate honing studs (10), extended at intersecting directions forming an angle (?) wherein the knife's edge is inserted to be straightened by the rotating polishing tool.

Abstract: A knife sharpener has a housing, a base, a sharpening device and an adjustable device. The housing has a case, a cavity and a slot. The cavity is defined in the case and the slot is defined in the case and communicates with the cavity. The base is mounted on the housing and has a base board and two side walls formed on the base board. The sharpening device is movable mounted on the base and is received inside the housing. The sharpening device has two sharpening arms with sharpening rods. The adjustable device is mounted on the sharpening device mounted between the two sharpening arms. When the knife sharpener is used, the adjustable device is rotated to change the cross-position of the sharpening device. Therefore, a knife may be sharpened at a different site on the sharpening rods for prolonging the life span of the knife sharpener.

Abstract: The sharpening apparatus of the present invention preferably comprises a hand sharpener that may be assembled or mounted on the knife (e.g., sold mounted on the knife by the knife manufacturer or purchased separately and mounted on the knife by the end-user), and which may remain on the knife after sharpening.

Abstract: An edge sharpener for various implements is provided. The edge sharpener includes a sharpener body having a pair of sharpening elements secured to a sharpener body in a fixed angular relationship. The sharpening elements are moveable along this fixed angular relationship to provide a fresh sharpening edge without removal of the elements from the body. The edge sharpener may be provided with precision adjusters for indexing the sharpening element. Further, a removable handle may be provided. By use of sharpening elements of a shape other than rectangular, more than one fixed angular relationship can be provided. Durability of the sharpening edges is enhanced by the form of the edge relief.

Abstract: A knife sharpener (10) has pairs of overlapping, resiliently flexible fingers or strips (21-23, 31-33) to form opposed sharpening faces (27-29, 37-39) operable to engage at least one cutting edge (101) on a knife blade (102). The sharpening faces (27-29, 37-39) can have abrasive materials and/or surfaces (40-43) to generate the desired finish on the cutting edge(s) (101).

Abstract: A device for sharpening the blades of sharp tools includes a plate fitted with an opening letting through the tool blade, opposite which opening are provided two sharpening structures in the form of oblong spindles which cross one another. Both these sharpening spindles are hinged at one of their ends on the plate, each on one side of the opening, and they include an elastic recall device for forming a sharpening V mobile under the pressure of the blade to be sharpened. Each sharpening spindle has a U-shaped rod with two parallel or substantially parallel arms which are connected at the bottom of the U and both fee ends of the U include square junctions forming hinging axes which are recessed, free to rotate, in offset engagement orifices provided on an appropriate support interlocked with the plate, in order to obtain elastic recall of the sharpening spindles by a twisting effect.

Abstract: A sharpening apparatus for a rotary knife blade includes a sharpening material support base and at least one lower sharpening device such as a metal pin mounted on the sharpening material support base. At least one upper sharpening device is mounted on the sharpening material support base, the upper sharpening device extending at an acute angle upwards above and relative to the lower sharpening device. The upper and lower sharpening devices are disposed relative to one another to generally simultaneously engage upper and lower surfaces of a blade to be sharpened and a guide device such as a curved wall structure is operative to releasably guide a blade between the upper and lower sharpening devices to assist with sharpening of a blade.

Abstract: A foldable hand sharpening tool is disclosed, having an elongate body/handle with a first sharpening member pivotally mounted at one end which folds into the body when not used, and at the other end having a “V” shaped sharpening slot formed by opposing sharpening members with pivotable elongate guide members which pivot into place to retain the blade in alignment in the “V” slot during sharpening and fold into the body when not used.

Abstract: A sharpening tool for the sharpening of single and double-beveled edge knives, broadhead arrows and related implements. The sharpener comprises a body with a handle, a handguard, and recesses for detachably mounting pairs of rectilinear sharpening and non-sharpening elements. The recesses are adapted so that a pair of mounted elements form a “V” shaped cutting angle of a constant degree. The pair of elements comprises two sharpening elements for double-beveled edge blades, and one sharpening element and one non-sharpening rest element for single-beveled edge blades. The “V-shaped” cutting angle formed by the mountd elements is imparted to a knife edge being sharpened, and accordingly the degree of angle is defined as the optimal blade edge cutting angle. The recesses are further adapted so that the overlapping sharpening and non-sharpening elements do not contact each other, preventing the elements from vibrating against each other and thereby extending the useful life of the elements.

Abstract: A sharpening tool for the sharpening of knives, broadhead arrows and related implements. The sharpener comprises a body with a handle, a handguard, and recesses for detachably mounting rectilinear sharpening elements. The recesses are adapted so that the mounted elements sharpening edges form a "V" shaped cutting angle of a constant degree. This same cutting angle is imparted to a knife edge being sharpened, and accordingly the degree of angle is defined as the optimal blade edge cutting angle. The recesses are further adapted so that the overlapping sharpening elements do not contact each other, preventing the elements from vibrating against each other and thereby extending the useful life of the elements. The point of coincidence of the cutting angle vertex upon the elements occurs substantially spaced from the element edge midpoints, thereby enabling each element edge to provide two distinct sharpening areas when the elements are exchanged and the same element edges are rotated to form the cutting angle.

Abstract: A blade sharpener having a sharpening mechanism that functions to sharpen a blade engaging the mechanism and being moved longitudinally relative to that mechanism. The sharpening mechanism is located within a hollow housing or scabbard for containing the blade, and means is provided to restrain the blade against inadvertent removal from the housing. The blade is moved into and out of the housing through a front end of the housing, and the restraining means becomes operative (automatically) when the blade is fully inserted. Locking means then functions to prevent release of the restraining means, and that locking means includes a plate movable in the longitudinal direction of the housing between locking and unlocking positions. The locking means is moved into the unlocking position by actuation of a press button located at the rear end of the housing, and automatically returns to the locking position when pressure is removed from the press button.

Abstract: A blade sharpener having a magazine slidably carried within a sleeve. The magazine contains two sets of three sharpening wheels carried for rotation within the magazine, which are positioned in a staggered relationship with respect to one another, such that each set of three sharpening wheels forms two sharpening interfaces. Two channels are defined in the magazine and are generally in alignment with each of the two sharpening interfaces. The magazine is movable with respect to the sleeve, and may be selectively fixed in at least three positions relative thereto with a spring-biased pushbutton. For storage or transport, the magazine is moved into the sleeve such that both sets of the sharpening wheels are housed within the sleeve. The magazine of the blade sharpener is also provided with an elongated sharpening rod which is pivotally connected to the magazine, and which is used to sharpen serrated blades.

Abstract: A hand-held sharpener tool for a knife or similar implement comprises a unitary body having first and second sections; sharpening elements mounted in the first section; the second section being located rearwardly of the sharpening elements and comprising an elongated handle on an upper side of the body, and an elongated hand guard extending rearwardly of the sharpening elements, the hand and the hand guard forming an elongated ring rearward of the sharpening elements with sufficient space for a user's fingers to extend between the handle and the hand guard. The sharpening elements can be provided to sharpen/deburr either a two-sided blade such as a knife blade or a one-sided blade such as a scissors blade.

Abstract: A hand-held sharpener tool for a knife or similar implement comprises a unitary body having first and second end sections and a third mid section, processing elements such as sharpening, deburring or whetting elements mounted in the first and second sections. The third section is located between the processing elements of the first and second end sections and comprises an elongated handle on an upper side of the body, and an elongated blade guide and hand guard extending inwardly of the processing elements, the handle and the hand guard forming an elongated ring rearward of the processing elements with sufficient space for a user's fingers to extend between the handle and the hand guard, and the blade guide depending from the hand guard. The processing elements can be provided to sharpen/deburr either a two-sided blade such as a knife blade or a one-sided blade such as a scissors blade. One of the sets of processing elements can be provided as whetting elements to whet a sharpened blade.

Abstract: Apparatus for providing a sharpened edge on an elongated cutting tool comprising a base member having an elongated slot therein and a pair of elongated sharpening elements each pivotally mounted on the base member at opposite sides of the upper end portion of the slot and extending in crossed relation and intersecting at the slot as a cutting tool is drawn downwardly and outwardly through the slot. Separate counterweights are connected to the upper end portions of each of the sharpening elements to resist their downward pivoting movement as the cutting tool is so drawn through the slot. Separate eccentrically mounted cams are disposed between each cutting tool and its axis of pivot to adjustably control the extent of swinging movement of each of the sharpening elements in both directions.

Abstract: A sharpener has two sharpening members pivotally mounted on opposite sides of a reference plane. Each sharpening member includes a counterweight portion below its pivot and a sharpening portion above its pivot. The sharpening portions have convex sharpening edges which overlap laterally to form a vertically movable V-shaped slot for receiving a cutting blade. A cutting blade is placed in the slot and moved lengthwise and downwardly. The downward movement causes the vertex of the V-shaped slot to move down, but the slot's vertex angle remains substantially constant because the curvatures of the sharpening edges increase progressively from upper regions to lower regions of the sharpening edges. The centers of gravity of the sharpening members are laterally inboard of the pivots, and the sharpening edges are higher than the pivots. The sharpening forces exerted by the sharpening edges against a cutting blade increase in response to downward movement of the slot vertex.

Abstract: A hand-held sharpener tool for a knife or similar implement comprises a unitary body having first and second sections; sharpening elements mounted in the first section; the second section being located rearwardly of the sharpening elements and comprising an elongated handle on an upper side of the body, an elongated hand guard extending rearwardly of the sharpening elements, and a blade guide located on a lower side of the body, the hand guard being located between the handle and the blade guide whereby sufficient space is provided for a user's fingers to extend between the handle and the hand guard.

Abstract: A knife sharpening device includes a vertically-oriented base having a vertically-oriented slot. Mounted on the base, on one side of the slot are two crossed sharpening members of a rod-like configuration. A lower end of each of the crossed sharpening members is anchored in a horizontally-extending pivot pin with a terminal end of each of the sharpening members extending beyond the pivot pins and engaging a horizontally-extending stop pin. The pivot pins are rotatably mounted in the base and extend through the base. A pivot wheel is mounted concentrically on a free end of the pivot pins on an opposite side of the base from the sharpening members. Two radially-extending set screws extend through the pivot wheels and engage a flat surface of the pivot pin to hold the pivot wheels on the pivot pins. Extending between the two set screws, threadingly mounted in the two pivot wheels, is a tensioning spring.

Abstract: A sheet metal edging file comprises a frame with a base and two side arms which extend upwardly. The side arms are formed in a generally planar configuration with an inner surface, an outer surface, parallel short end edges and parallel long side edges. The side arms also have an upper region and a lower region, with one short side of each side arm being contiguous with the upper surface of the base. The upper region of each side arm also includes a centrally located aperture extending therethrough. The plane of the side arms are angled at an acute angle with respect to the axis of the base. Two file wheels are formed in a planar, generally circular configuration with a centrally located circular aperture extending therethrough. Each wheel has an inner surface and an outer surface and includes a plurality of blades on its inner surface. The blades extend radially outward from the central aperture to a location proximate to its outer edge. The wheels are positioned to oppose each other at an acute angle.

Abstract: A sharpening device is provided for an edge of a ski which consists of a handle to be gripped by a hand of a person. A pair of Y-shaped flexible arms extend from the handle. A pair of sharpening members are also provided. A structure is for holding the sharpening members at reverse overlapping angles on distal ends of the arms. When used it will always result in a ski ,edge which is smooth and burr free. The sharpening members will make a proper bevel edge angle no matter what direction the device is held.

Abstract: A knife sharpener having a specially configured sharpening groove for sharpening knives or the like to a particularly narrow and sharp edge. The sharpener comprises a body member having a rectangular extension which has a recess for engaging the sharpening blades. The body member has grooves therein for engaging support members, one of which acts as a guard from the knife sharpening activity. A second embodiment includes the supports being angled so as to place the knife sharpener at an angle for easy access thereto. The blades are substantially triangular in shape wherein the corners of each blade are rounded, all having equivalently-sized radii. The blades are detachably attached to the body member within the recess so that the blades can be rotated or flipped for exposing additional and fresh sharpening edges.

Abstract: A hand-held device is described for simultaneously sharpening the points of multiple fish hooks, particularly double and treble hooks in which the concave hook sharpening member is provided with abrasive surfaces for honing the hook points by longitudinal movement of the hook in the device.

Abstract: A handy knife sharpener comprising two symmetric side frames connected together to hold two crossed abrasive rods therein for sharpening cutting tools, wherein the peripheral edge thereof comprises a hand-hold portion at one end for comfortable and positive grip, a bevel slot at the top for supporting and guiding the knife to be sharpened, a sloping surface portion at an opposite end at right angle relative to said bevel slot for stopping against the ground of a work table. The position of each abrasive rod can be changed once it is worn at a fixed area on the peripheral grinding surface thereof.

Abstract: A device particularly suited for sharpening broadhead arrows and having sharpening surfaces which are curved in the direction the broadhead travels as it is sharpened. In a preferred embodiment, the sharpener comprises two sharpening surfaces to sharpen broadhead arrows and a third cylindrical sharpening surface which can be used to sharpen other discrete cutting elements. Each broadhead sharpening surface is formed as two sections which are curved about an axis perpendicular to the direction of travel of the arrow blades so that only one line of contact is formed between a blade and its respective sharpening section, resulting in even sharpening along all the points on a blade.

Abstract: A razor assembly for shaving, and a combination razor assembly and container for sharpening the razor, is provided. A razor body includes a blade carrier with a reusable blade. A blade guard engages the blade for guiding over the skin surface during shaving. The guard is released to freely expose the blade for cleaning/sharpening while maintaining the blade attached to the carrier. The container includes an opening for receiving the exposed blade and opposed arrays of honing shoes are provided along a path for engaging the blade during sharpening movement of the razor along the container. A guide track having guide grooves engages the blade guard to ensure accurate movement of the blade with respect to the honing shoes. One honing shoe array along one side of the path is spring biased toward the other to assure unison movement and efficient sharpening action.

Abstract: A blade sharpener of the kind having a pair of overlapping plates which are relatively arranged to form a vee shaped sharpening recess between them. Each of the opposite sloping sides of that recess is formed by an operative edge of a respective one of the two plates, and each of those edges extends between a front face and a back face of the respective plate. A relatively sharp corner is formed between each operative edge and the back face of the respective plate, and a relatively blunt--e.g., rounded--corner is formed between each operative edge and the front face of the respective plate. The plates may be mounted on a member which can pivot between a position at which the plates tilt forward and a position at which the plates tilt back. Spring means may be operative to engage the back edge of a blade located in the recess so as to press the cutting edge of the blade against the plates.

Abstract: Apparatus for steeling an inside and an outside annular surface that together form a cutting edge of an annular rotary knife blade. Two or more steeling members are utilized, to separately contact the inside surface and the outside surface of the blade. A fixture receives and orients a knife blade relative to the steeling members. The knife fixture is movable along guiding means relative to the steeling members, and is yieldably biased to a predetermined blade-receiving position.

Abstract: A device for straightening, aligning and sharpening a cutting edge. The device is composed of a base member with an elongated slot transverse to the longitudinal axis of the base member to permit passage of a cutting blade therethrough; a pair of edge sharpening members each secured in the base member and each defining an arcuate sharpening surface extending into the slot and each laterally displaced from each other on the longitudinal axis; and an edge straightener extending outwardly from the base member along the longitudinal central axis.

Abstract: A knife deburring or steeling device includes a frame with an elongated knife blade-receiving slot. Deburring rods are crossed over the knife slot in an X-shaped configuration, with the ends of each rod being fixed to slide members having shanks extending respectively through four complementary elongated track slots arranged in pairs which respectively diverge in opposite directions from the opposite ends of the knife slot. Each slide member has an enlarged cylindrical head at one end having a diameter larger than the width of the associated track slot, with each of one pair of slide members having a rectangular foot at the other end with a width less than and a length greater than the width of the associated track slot so that it can be passed through the track slot in a mounting orientation but is locked against removal from the track slot in a use orientation.

Abstract: A combination tape measurer, pencil sharpener and knife blade sharpener is provided. The pencil and knife blade sharpeners are provided on a separate insert that is fitted onto the tape measurer. This allows each component to be used without interfering with the others. A conventional retractable tape measurer can be modified to produce the resultant combination tool.

Abstract: A tool apparatus wherein an elongate longitudinally aligned handle includes a plurality of rollers rotatably mounted coaxially spaced from the handle forwardly thereof. The rollers include deburring or cutting edges to remove roughness and smooth edge surfaces of brittle material such as metals, rigid polymerics, and the like. Modifications of the invention includes a first roller biased against a second roller utilizing a hinged lever arm pair mounting one roller relative to the other roller. Further modifications include conically tapered rollers each including an axis parallel relative to one another wherein a removable conical abrasive sheaths are securably mounted utilizing adhesive and the like onto a respective conical roller.

Abstract: A blade sharpener having a sharpening mechanism which functions to sharpen a blade engaging that mechanism and being moved longitudinally relative thereto. The sharpener also includes sharpening defeating means which, when operative, at least inhibits and possibly prevents sharpening of a blade by the sharpening mechanism when that blade is moved longitudinally through the sharpener in one direction. The defeating means is responsive to blade movement so as to adopt an operative condition when the blade is moved in the aforementioned one direction, and to adopt an inoperative condition when the blade is moved through the sharpener in the opposite direction. The defeating means includes a blade engaging member such as a roller, and in the operative condition that roller engages and presses against the cutting edge of the blade so as to impose a force on the blade which acts counter to the force causing the blade to engage the sharpening mechanism.

Abstract: A device for sharpening a cutting edge including a base an elongated slot that is dimensioned to permit free passage of a cutting blade therealong. At least one sharpening element is pivotally secured to the base near its upper end and extends across the slot at a predetermined angle. Preferably, two such sharpening elements are employed, intersecting at the slot so that a cutting edge moved along the slot will be sharpened on both sides during a single pass through the slot. The sharpening elements may be straight or curved and are always under a predetermined tension. This tension may be applied by either springs or counterweights.

Abstract: The holder comprises a body slotted to fit over a side of a partially opened cabinet drawer and shaped to fit against the inside surface of the front of the drawer. In a preferred embodiment the upper end of the body is fitted with a "crossed steels" knife sharpener and a slanted steel scissors sharpener situated in slots in the upper end. The holder is removed and stored in the drawer when not needed.

Abstract: Novel methods and apparatus for providing a facet on opposed surfaces of a cutting instrument such as a razor blade or the like. Essentially, the methods and apparatus are designed to initially abrade opposed surface portions of the instrument concurrently with a relatively high degree of coarseness at a relatively low included angle and thereafter concurrently abrading the opposed surface portions with progressively decreasing degrees of coarseness at progressively increasing included angles. The facets provided by the methods and apparatus on the opposed surfaces of the instrument have a surface in which the included angle decreases as the distance from the edge of the instrument increases.