EP0349017B1 - Messerschleifgerät - Google Patents

Messerschleifgerät Download PDF

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Publication number
EP0349017B1
EP0349017B1 EP89116670A EP89116670A EP0349017B1 EP 0349017 B1 EP0349017 B1 EP 0349017B1 EP 89116670 A EP89116670 A EP 89116670A EP 89116670 A EP89116670 A EP 89116670A EP 0349017 B1 EP0349017 B1 EP 0349017B1
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EP
European Patent Office
Prior art keywords
sharpening
knife
disk
section
angle
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EP89116670A
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English (en)
French (fr)
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EP0349017A2 (de
EP0349017A3 (en
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Daniel D. Friel
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Individual
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Priority to AT89116670T priority Critical patent/ATE102111T1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
    • B24B3/54—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of hand or table knives

Definitions

  • This invention relates to a new and improved method and apparatus for rapidly sharpening knives and similar tools to create a superior cutting edge.
  • knife shall be defined to include any sort of blade such as chisels, plane edges, scissors, razor blades, and similar precision edges or cutting tools.
  • the application is a divisional of EPA 85102761.5 (EP-A-0 154 967).
  • Rapid sharpening requires a means to remove rapidly the material of composition of the knife --often a high carbon steel or a stainless steel.
  • the rate of metal removal is related to the inherent hardness of the abrasive used, the particle size, or grit as it is commonly called, of the abrasive, the applied pressure on the knife edge, and the linear velocity of the abrasive particles across the edge being formed or sharpened.
  • the hardest material commonly used for metal removal is diamond with a hardness of 10 on the Mohs' scale, compared to about 5.5 or so for many steel alloy knives.
  • Other materials such as alumina, high density alpha alumina, carborundum, certain natural stones and the like also are harder than most steels and hence can be used for sharpening through abrasive action against the metal.
  • any process designed to create such edges is not optimum for the task of initial metal removal such as where a knife is first being formed or where the blade is particularly dull. Consequently, to reduce the total elapsed time needed with a very dull knife to create a thin and fine edge of a thickness limited only by the composition of knife and its crystalline structure, one usually resorts to a series of different and time consuming grinding and sharpening operations. None of the integrated sharpening equipment existent today are satisfactory for the rapid generation of fine edges on the order of 1/10,000 inch on otherwise very dull knives.
  • Such grabbing occurs if there is instability in the control of the angle that the knife face makes with the disk face, or inadequate means to hold the knife edge parallel to the flat surface of the disk, or poor control over the consistency of force applied to the knife edge by the disk or operator during sharpening.
  • a major cause of poor sharpening with disk sharpeners is poor control of knife angle relative to the rotating disk such as exemplified in prior art U.S. Patent No. 2,496,139 that actually allows the knife guide to wobble and the sharpening angle to be determined more by operator skill or by the knife width and thickness. Poor control of the knife edge parallel to disk face or poor control of the angle of knife face relative to the principal plane of a disk sharpener is unacceptable if one wishes to optimize blade edge sharpness and to avoid gouging.
  • a complex sharpener covered by U.S. Patent No. 2,519,351 contains two pair, a total of four (4) abrasive blocks, one pair of which is biased to move toward the other, that sharpens by a reciprocating rectilinear motion simultaneously both cutting edge facets of a knife.
  • the knife is held by three sets of jaws in a positioning means designed to be free floating in lateral position between the abrasive pairs and to moderate insertion of the blade into the positioning means by engaging the sides of the knife in one or more of three (3) grooved blocks.
  • this sharpener has the disadvantages inherent in all rectilinear motion sharpeners which leaves a serrated knife edge which cuts by tearing and has poor wear characteristics.
  • U.S. Patent No. 2,751,721 describes a sharpener with a drum shaped abrasive element where the knife cutting edge facet is sharpened against annular portion of the drum surface that rotates in a plane perpendicular to the axis of rotation of the drum.
  • the abrading force on the cutting edge is determined solely by the degree of hand pressure applied to the knife by the operator which leads to significant inconsistencies in abrading rate, poor edge formation, and gouging of the edge -- problems common to much of the prior art.
  • U.S. Patent No. 2,645,063 describes a sharpener with a drum surface and a guide mechanism which provides stops that position the knife by bearing directly on the cutting edge itself. Such stops are impractical because of the constant dulling effect on the edge created by rubbing it directly across and normal to one surface of the guide.
  • This patent and U.S. Patent No. 2,751,721 describe sharpeners that incorporate a magnet. The magnetic field does not support or guide the knife.
  • U.S. Patent 2,841,926 discloses an apparatus according to the preamble of Claim 1, that is a combined knife sharpener and buffer having a motor-driven rotatable shaft with a grinding wheel mounted thereon in a first sharpening section and a buffing wheel mounted thereon in a second buffing section.
  • the knife sharpening apparatus of the present invention also has two sections with a grinding wheel or disk in its first section, and is characterized by the fact that its second section comprises a sharpening member with a pair flat outer faces having abrasive particles thereon, drive means for orbitally driving said sharpening member such that each abrasive particle thereon has a separate orbital path within or parallel to the outer faces and the amplitude of said paths are essentially equal for each particle, and second sharpening section guide means opposite respective outer faces of its sharpening member.
  • the invention also provides a method of sharpening a knife having a cutting edge facet comprising placing the knife against a first inclined guide surface at a first angle in a first sharpening section of a housing with the cutting edge facet against abrasive particles on a surface of a disk mounted on a rotatable shaft, rotating the shaft to rotate the disk surface and sharpen the cutting edge facet, removing the knife from the surface of the disk the cutting edge facet being against abrasive particles on a second surface of the disk assembly mounted on the rotatable shaft, rotating the shaft to rotate the second surface of the disk assembly and further pre-sharpen the cutting edge facet, placing the knife against an inclined second guide surface in a second section of the housing with the cutting edge facet against abrasive particles on a first face of a sharpening member, orbitally driving the sharpening member to further sharpen the cutting edge facet, removing the knife from the first face of the sharpening member, placing the knife against an inclined further guide surface in the second sharpen
  • the use of the knife sharpening apparatus as described here can produce quickly in hands of the inexperienced well defined and reasonably sharp edge with reduced risk of gouging, overheating, or damaging the general contour and shape of the knife edge. A very thin and finer edge can be generated quickly. Most effective use of these methods and apparatus depends critically on the control of sharpening angle in each step.
  • the ultimate width of the edge is established primarily by the properties and quality of steel or other material used in the knife.
  • the guide preferably magnetic, used to position the knife in this orbital sharpening step commonly positions the face of the knife relative to the plane of the orbiting abrasive surface at an angle, referred to herein as the second sharpening angle, preferably larger than the first sharpening angle between the face of the knife and the plane of the abrasive disk used in the preceding disk sharpening step, referred to herein as the first sharpening angle. This will cause the orbiting abrasive to sharpen the knife cutting edge facets at a slightly greater total included angle than their existing total angle after the disk sharpener.
  • the combination of disk and orbital sharpening is unique because of the overall speed with which a very fine edge is formed.
  • the disk sharpener disclosed here can quickly preform the knife edge which is then passed through the orbital sharpener to develop rapidly a razor like edge.
  • Fig. 1 is a plan view of a combined disk sharpener and a two stage orbiting sharpener in a single apparatus constructed according to this invention.
  • Fig. 2 is a cross sectional elevation view taken along line 2-2 of Fig. 1 of a combined disk sharpener and a two stage orbiting sharpener in a single apparatus constructed according to this invention.
  • Fig. 3 is an elevation view of a further embodiment of the first sharpening section.
  • Fig. 4 is a cross-sectional view taken through Figure 3 along the line 4-4.
  • Fig. 5 is a cross sectional view of a knife with a 45° total angle at edge indicating sharpening to be made at 34° by the disk sharpener.
  • Fig. 6 is a cross sectional view of resultant knife with a 34° total angle at edge formed by first stage disk sharpener indicating sharpening to 40° in the next orbital sharpening step according to this invention.
  • Fig. 7 is a cross sectional view of a resultant knife showing the 34° and 40° angles formed along cutting edge facets formed respectively by the disk sharpening step and the first orbital sharpening step, according to this invention.
  • Fig. 8 is a cross sectional view of the knife cutting edge facet (high enlargement) showing the resulting 34° and 40° angles formed along the cutting edge facets and indicating a 45° total angle to be placed on the cutting edge facets by second orbiting sharpening step.
  • Fig. 9 is a cross sectional view of finished knife cutting edge facets with 34°, 40° and 45° angles formed on the facets as created by the disk sharpener followed by two orbiting sharpening steps according to this invention.
  • the apparatus as shown in Figures 1 and 2 combines a disc sharpener and an orbital sharpener into a single sharpener that can be used by the inexperienced to produce reliably and rapidly razor-sharp edges.
  • Base plate 22b supports motor 24b, fastened to base plate 22b by screws or other means (not shown), whose left shaft 26b drives disk holder 28b on which is mounted abrasive disk 30b that rotates about 3000 RPM but at a maximum surface abrasive circumferential velocity of less than about 244 m/min (800 ft./minute) to reduce the risk of overheating the knife edge.
  • Fan 100 mounted on shaft 26b serves to cool motor 24b. Air enters the apparatus through the annulus 102 between upper cover 104 and lower cover 106 and exhausts out a base opening 108 in the base plate 22b which is supported on rubber feet 32b.
  • the knife guide assembly 118 contains plastic structures 148 that support magnetic elements 150 which attract and establish a guide plane for the face of the knife.
  • the knife guide assembly 118 also includes knife stops 152, shown in Figure 1, that serves a variety of functions as described in the application cited above.
  • the knife guide 50b used with the abrasive disk 30b contains plastic supporting structure 154 that extends and contacts the face of enclosure 60b. It contains a magnetic element 62b to control the angle of the face of knife relative to the abrasive disk 30b. The magnetic element 62b which attracts the knife and establishes a guide plane for the face of the knife. In use the cutting edge facet of the knife placed on guide 50b rests on the stop 54b on the face of enclosure 60b.
  • the drive cranks 134 can be an integral part of shaft 130 as described above or be a separate part affixed thereto.
  • the spring loading concept employed here in conjunction with the stops 54b on the face of enclosure 60b and the blade guide system provides relatively constant force on the blade edge while being sharpened and uniform sharpening action along the length of knife edge without gouging.
  • the enclosure 60b for the disk shown on lower left is designed to provide a safety cover and structure for stops 54b but without interfering with free knife edge insertion between disk 30b and guide 50b and free contact of the cutting edge facet against the surface of disk 30b.
  • the construction of the knife guides for the disk and subsequent orbiting abrasive sharpening steps be very similar so as to position and hold the knife in an essentially uniform manner in each sharpening position except for deliberate changes in the sharpening angle.
  • the present invention addresses this problem for the first time in a manner that insures rapid sharpening of a blade to a razor sharp edge without prior knowledge of the initial angle of the cutting edge.
  • the blade is given an initial sharpening with a coarse grit disk sharpener but at a precisely determined edge angle that is less than the sharpening angles used in the orbital sharpener that uses generally a finer grit size, a lower velocity of the abrasive elements, and the unique orbital motion that produces a razor-like edge.
  • the knife to be sharpened has its cutting edge facets meeting at an initial total angle of 45°, a popular angle for kitchen knives
  • the disk sharpener sharpen the knife to create a precisely known total angle at the knife edge as established by the two cutting edge facets. This angle should be less than the angle to be created on the facet in subsequent orbiting sharpening stages.
  • a convenient angle of choice might be 34° by way of this example as shown in Figure 5.
  • This sharpening step entails removal of a substantial amount of metal from the edge, a task the disk sharpener with say 100-180 grit is ideally suited to do rapidly with creation of only little burr on the edge. If by chance the initial total blade angle were less than 34°, the disk sharpener would nevertheless generate a 34° angle on the blade.
  • the resulting blade edge shown in Figure 6 with a 34° total included angle then can be sharpened to a razor edge in either a one step or multiple step orbital sharpener.
  • the use of two orbital sharpener steps following disk sharpening makes is possible to use first a faster-working coarser grit followed by a finer grit to leave a smoother edge.
  • the knife of Figure 6 with a 34° total angle is sharpened to a 40° total angle which can be done rapidly with an orbiting abrasive of about 180 grit.
  • This step need entail removal of only a small amount of metal near the edge of the cutting edge facets as seen in Figure 6, compared to the amount of metal removed in the preceding disk sharpener operation.
  • the resulting blade Figure 7 has a 34° total angle along the rear of the cutting edge facet and a 40° total angle nearer to the cutting edge itself.
  • the resulting knife edge of this example shown in Fig. 9 and highly enlarged compared to the scale of starting blade of Figure 6 has three micro bevels along each cutting edge facet 70 that form total angles of 34°, 40°, and 45° respective as one views the knife cutting edge facets at positions progressively closer to the cutting edge. Because that length along the cutting edge facet that is beveled at 45° is very small, usually less than 0.030 inches, it can be sharpened rapidly with the fine grit orbital sharpener leaving essentially no burr on the edge. Any final micro-burr on the blade edge can be readily removed by pushing the knife edge over and in sliding contact with the knife stops 152 of Figure 1 before the blade edge facet is abraded by the orbiting abrasive 146.
  • a knife sharpened as just described has a significantly superior cutting quality compared to knives sharpened by more conventional means.
  • a knife sharpened according to this example will have three distinct micro bevels on the cutting edge facet as shown in Figure 9. Superior cutting qualities of a cutting edge facet with multiple micro bevels are attributable to the fact that the decreasing bevel angles toward the rear of the cutting edge facet offers angular relieve immediately behind the edge that allows the material being cut to tend to move away from or to bear less firmly on the rear portion of the cutting edge facet.
  • a knife with appropriate micro cutting edge facets as created by this invention can remove readily a very fine shaving of material from the surface of a material as contrast to a greater tendency of a knife to split the surface and dig below the surface if the cutting edge facets are planar as a result of being sharpened only at a single angle.
  • Figures 3 and 4 show an alternative form of the first sharpening section using a split disk arrangement.
  • the double disk design has proven particularly effective to permit the operator to sharpen conveniently both cutting edge facets of a knife from the same side of the sharpener.
  • two disks 30d, 30d are secured and positioned back to back on a driven shaft 26d and held apart against stops in their rest positions by a biasing mechanism, such as spring 100, located between the two disks forcing the disks apart. Travel of each disk along the shaft axis is limited in one direction by the stop or pin 101 located on the shaft and in the other direction by the position of the second disk or the biasing mechanism.
  • each disk against the biasing mechanism and toward the opposite disk must be sufficient to avoid the possibility of the disk reaching its limit of travel against the biasing mechanism at any time while the knife being sharpened is displacing the disk against the biasing mechanism.
  • the disks secured to the stops can slide independently on their common shaft while each is forced to rotate at the shaft speed by a pin 101 fastened to or through the shaft, that engages within a slotted portion 102 of the hub of each disk. That pin 101 also can serve as a stop to control position of the disks in this rest position.
  • Other means of driving the disks at shaft speed while allowing the disks to slide on the shaft will be obvious to those skilled in mechanical arts.
  • Abrasive mounted on the outside faces of each disk 30d, 30d rotating on the shaft 26d is pressed against the knife cutting-edge facet during sharpening by a force determined by the spring or other biasing means.
  • the rate of metal removal during sharpening depends on the biasing force and on the size and speed of the abrasive particles.
  • stops as shown in EPA 85102761.5 may be extended sufficiently toward the disks to prevent the knife blade from being inserted too far and to provide support for the vertical facet. These stops thus would limit the degree of insertion of the knife and limit the displacement of the disk against the spring.
  • the invention may also be used by mounting any suitable number of disks on each shaft to achieve different types of abrading action such as coarse and fine or any intermediate treatments.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Liquid Crystal (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Removal Of Insulation Or Armoring From Wires Or Cables (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Paper (AREA)

Claims (10)

  1. Ein Messerschleifgerät bestehend aus einem Gehäusesockel (22b), einem ersten und einem zweiten Teil in dem Gehäuse, einer motorbetriebenen, rotierbaren Drehwelle (26b) in dem ersten Teil, einer auf der motorbetriebenen, rotierbaren Drehwelle befestigten Scheibe (30b), Schleifpartikeln auf einer flachen Fläche der Scheibe und einem Führungsteil (50b) auf dem Gehäusesockel gegenüber der Scheibenfläche, dadurch gekennzeichnet, daß der zweite Teil eine Schleifeinheit (144) mit einem Paar von flachen Außenflächen (146) aufweist, auf denen sich Schleifpartikel befinden, mit einer Antriebsvorrichtung (134, 136) zum Orbitalantrieb der Schleifeinheit, sodaß jede der dort befindlichen Schleifpartikel eine separate Umlaufbahn innerhalb von oder parallel zu den Außenflächen hat und wobei die Amplitude der jeweiligen Bahnen für jede Partikel im wesentlichen gleich ist, und mit Führungsvorrichtungen (118) des zweiten Schleifteils, die gegenüber den entsprechenden Außenflächen ihrer Schleifeinheit angeordnet sind.
  2. Eine Vorrichtung gemäß Anspruch 1, wobei das Führungsteil (50b) für die Scheibe eine Führungsfläche in einem gewissen Winkel zu der Scheibe aufweist, und die Führungsvorrichtungen des zweiten Schleifteils Führungsflächen (148) haben, die Spiegelbildwinkel zueinander haben, wobei die Spiegelbildwinkel sich von dem Führungsflächenwinkel des ersten Schleifteils unterscheiden.
  3. Eine Vorrichtung gemäß Anspruch 1 oder 2, mit einer zweiten, auf der rotierbaren Drehwelle (26d) befestigten Scheibe (30d), wobei beide Scheiben verschiebbar auf der Drehwelle angebracht sind und jede eine Hinterseite und eine Vorderseite hat, die sich senkrecht zur Drehwelle erstrecken, wobei die Hinterseiten der Scheiben einander zugewandt sind und die Vorderseiten voneinander abgewandt angeordnet sind, mit einer elastischen Vorrichtung (100) zwischen den Hinterseiten, die auf die Scheiben zum Auseinanderdrücken der Vorderseiten einwirkt, mit einer Anschlagsvorrichtung auf der Drehwelle zur Begrenzung der Gleitbewegung der Scheibenanordnungen, die durch die elastische Vorrichtung verursacht wird, mit einem Schlitz (102) in jeder Scheibe, der sich bis kurz vor die Hinterseite erstreckt, wobei dort eine Wandungstärke aufrechterhalten bleibt, und die Anschlagsvorrichtung einen Stift (101) aufweist, der auf der Welle montiert ist und in jedem der Schlitze angeordnet ist, wobei die Stifte dazu dienen, die Gleitbewegung der Scheibe zu stoppen, wenn sie mit den Wandungstärken in Anschlag kommen, und um eine relative Drehung der Scheiben gegenüber der Welle zu vermeiden, sodaß die Scheiben mit der Welle rotieren, und einer Schleifvorrichtung auf den Vorderseiten.
  4. Eine Vorrichtung gemäß einem der Ansprüche 1 bis 3, mit einem dritten Schleifteil (Figuren 1 und 2) und einer Schleifeinheit (144) in diesem dritten Schleifteil, wobei die Schleifeinheit des dritten Schleifteils ein Paar flache Außenflächen (146) mit darauf angebrachten Schleifpartikeln aufweist, mit einer Antriebsvorrichtung (134, 136) zum Orbitalantrieb der Schleifeinheit des dritten Schleifteils, mit einer Führungsvorrichtung (148), die jeder Außenfläche der Schleifeinheit des dritten Schleifteils zugeordnet sind und die Spiegelbildwinkel zueinander haben, wobei die Spiegelbildwinkel der Führungvorrichtung des dritten Schleifteils sich von den Führungsflächenwinkeln des ersten und des zweiten Schleifteils unterscheiden.
  5. Eine Vorrichtung gemäß Anspruch 4, wobei die Führungsflächenwinkel des dritten Schleifteils größer sind, als die Führungsflächenwinkel des zweiten Schleifteils, welche wiederum größer sind, als der Führungsflächenwinkel (50b) des ersten Schleifteils.
  6. Eine Vorrichtung gemäß Anspruch 5, wobei die Antriebsvorrichtung zum Orbitalantrieb der jeweiligen Schleifeinheit des zweiten und des dritten Schleifteils jeden seiner Schleifpartikel mit einer orbitalen Geschwindigkeit antreibt, die nicht größer als 244 m/min (800 Fuß/Min) ist.
  7. Eine Vorrichtung gemäß einem der vorhergehenden Ansprüche, wobei die Schleifpartikel Diamantpartikel sind, die im wesentlichen flache Oberfläche aufweisen.
  8. Ein Verfahren zum Schleifen eines Messers mit einer Facette auf der Schneide, mittels einer Vorrichtung gemaß einem der Ansprüche 1 bis 7, bestehend aus den folgenden Schritten:
    Anbringen des Messers gegen eine erste, zu einem ersten Winkel geneigte Führungsfläche in einem ersten Schleifteil eines Gehäuses, mit der Facette der Schneide gegen Schleifpartikel an einer Oberfläche einer auf einer Drehwelle montierten Scheibe, Drehen der Welle, um die Scheibenoberfläche zu rotieren und somit die Facette auf der Schneide zu schärfen, Entfernen des Messers von der Oberfläche der Scheibe, wobei sich die Facette auf der Schneide gegen Schleifpartikel an einer zweiten Oberfläche der auf der Drehwelle montierten Scheibenvorrichtung befindet, Drehen der Welle, um die zweite Scheibenoberfläche der Scheibenvorrichtung zu rotieren und die Facette auf der Schneide weiter vorzuschärfen, Anbringen des Messers gegen eine zweite, geneigte Führungsfläche in einem zweiten Schleifteil des Gehäuses, mit der Facette der Schneide gegen Schleifpartikel an einer ersten Oberfläche einer Schleifeinheit, Antreiben der Schleifeinheit in einer orbitalen Bewegung, um die Facette der Schneide weiter zu schärfen, Entfernen des Messers von der ersten Oberfläche der Schleifeinheit, Anbringen des Messers gegen eine weitere, geneigte Führungsfläche im zweiten Schleifteil, mit der Facette der Schneide gegen Schleifpartikel an einer zweiten Oberfläche der Schleifeinheit, wobei die weitere Führungsfläche zu einem Spiegelbildwinkel gegenüber der zweiten Führungsfläche geneigt ist, wobei dieser Winkel sich vom Winkel der ersten Schleifführungsfläche unterscheidet, Antreiben der Schleifeinheit in einer orbitalen Bewegung, mit dem Messer gegen die weitere Führungsfläche.
  9. Ein Verfahren gemäß Anspruch 8, einschließlich eines dritten Schleifteils in der Schleifvorrichtung mit Führungsflächen mit Spiegelbildwinkeln, die sich von den Spiegelbildwinkeln des zweiten Schleifteils unterscheiden zum Ausrichten der Schneide gegen eine zweite Schleifeinheit mit Orbitalantrieb und mit Schleifpartikeln auf ihren Oberflächen, einschließlich der folgenden Schritte:
    Entfernen des Messers von dem zweiten Schleifteil, Anbringen des Messers gegen eine der Führungsflächen des dritten Schleifteils mit dem Messer gegen die zweite Schleifeinheit, Orbitalantreiben der zweiten Schleifeinheit zur Übertragung einer Orbitalbewegung auf die zweite Schleifeinheit, Entfernen des Messers von der ersten Führungsfläche des zweiten Ziehschleifteils, Anbringen des Messers gegen eine weitere Führungsfläche des dritten Schleifteils mit der Schneide gegen die zweite Schleifeinheit, Orbitalantrieb der zweiten Schleifeinheit, wobei der Orbitalantrieb sowohl der ersten, als auch der zweiten Schleifeinheit eine Orbitalgeschwindigkeit auf jeden Schleifpartikel bei nicht mehr als 244 m/min (800 Fuß/Min) überträgt.
  10. Ein Verfahren gemäß Anspruch 9, wobei der Führungsflächenwinkel von dem ersten zum zweiten und zum dritten Schleifteil vergrößert wird.
EP89116670A 1984-03-12 1985-03-11 Messerschleifgerät Expired - Lifetime EP0349017B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89116670T ATE102111T1 (de) 1984-03-12 1989-09-08 Messerschleifgeraet.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US58879584A 1984-03-12 1984-03-12
US588795 1984-03-12

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP85102761.5 Division 1985-03-11

Publications (3)

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EP0349017A2 EP0349017A2 (de) 1990-01-03
EP0349017A3 EP0349017A3 (en) 1990-12-05
EP0349017B1 true EP0349017B1 (de) 1994-03-02

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EP89116670A Expired - Lifetime EP0349017B1 (de) 1984-03-12 1985-03-11 Messerschleifgerät
EP85102761A Expired - Lifetime EP0154967B1 (de) 1984-03-12 1985-03-11 Messerschleifgerät

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EP85102761A Expired - Lifetime EP0154967B1 (de) 1984-03-12 1985-03-11 Messerschleifgerät

Country Status (11)

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EP (2) EP0349017B1 (de)
JP (2) JPH0661684B2 (de)
KR (1) KR930007147Y1 (de)
AT (2) ATE56645T1 (de)
AU (1) AU577838B2 (de)
BR (1) BR8501077A (de)
CA (2) CA1256292A (de)
DE (2) DE3579712D1 (de)
IL (1) IL74576A (de)
NZ (1) NZ211349A (de)
ZA (1) ZA851702B (de)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1210278B (it) * 1987-04-21 1988-09-14 Cuoghi Affilatrici Di Cuoghi E Metodo per l'affilatura di coltelli per uso casalingo e da macellazione
GB8805728D0 (en) * 1988-03-10 1988-04-07 Ketteringham T Apparatus for sharpening edge tools
DE3819918A1 (de) * 1988-06-11 1989-12-21 Heinz Erath Schleifgeraet
US5148587A (en) * 1990-10-18 1992-09-22 Phelps Carl R Multi-purpose pipeline construction and testing machine
US5105582A (en) * 1991-04-17 1992-04-21 Bell Peter M Cup cutter sharpener
IT1256364B (it) * 1992-09-01 1995-12-04 Fazzini Patrizio Macchina perfezionata per l'arrotatura e l'affilatura di lame in genere
US5397262A (en) * 1993-07-08 1995-03-14 Lii; Chuen-Cherng Knife grinder
JPH09131649A (ja) * 1995-11-10 1997-05-20 Hayashi Kogyo Kk 電動式庖丁研ぎ器
DE29620423U1 (de) * 1996-11-22 1998-03-26 Hohlfeldt Petra Electric Schleifvorrichtung
US7740522B2 (en) 2007-07-09 2010-06-22 National Presto Industries, Inc. Knife sharpener
JP2008030197A (ja) * 2007-10-23 2008-02-14 Edgecraft Corp 高速で精密な研ぎ装置
JP5582880B2 (ja) * 2009-07-03 2014-09-03 京セラ株式会社 研磨機
JP5629773B2 (ja) * 2009-08-07 2014-11-26 エッジクラフト コーポレイション クロス状に研削されたエッジを作成するための新規な研ぎ器
US8816029B2 (en) 2009-08-28 2014-08-26 3M Innovative Properties Company Compositions and articles comprising polymerizable ionic liquid mixture, and methods of curing
EP2308642B1 (de) 2009-10-07 2013-12-04 Hans-Peter Zahnd Schleifmaschine
US8853338B2 (en) 2009-12-22 2014-10-07 3M Innovative Properties Company Curable dental compositions and articles comprising polymerizable ionic liquids
US8491356B2 (en) 2010-02-15 2013-07-23 National Presto Industries, Inc. Adjustable knife sharpener
CN104690657A (zh) * 2013-12-04 2015-06-10 林国平 平面式刀具研磨装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR396186A (fr) * 1908-11-12 1909-04-03 John Sturtridge Dreadon Meule perfectionnée
FR864572A (fr) * 1940-03-29 1941-04-30 Berkeley Ind Ltd Perfectionnements aux machines pour émoudre ou affûter les lames de couteau et autres
US2841926A (en) * 1954-05-06 1958-07-08 Supreme Products Corp Knife sharpener casing
FR1150373A (fr) * 1956-06-02 1958-01-10 Affûteur rectifieur portatif ou fixe à angles variables
US3052068A (en) * 1959-11-09 1962-09-04 Burgess Vibracrafters Inc Knife sharpener
US3071899A (en) * 1961-02-24 1963-01-08 Gen Electric Knife sharpener
US3146555A (en) * 1962-03-05 1964-09-01 Udico Electric Co Apparatus for opening cans and sharpening knives
GB1454782A (en) * 1973-06-09 1976-11-03 Bisbell Magnetic Products Ltd Permanently magnetic holder for ferromagnetic objects
GB1520209A (en) * 1976-06-25 1978-08-02 Olodort R A Film apparatus
JPS6221407Y2 (de) * 1978-06-26 1987-05-30
AT377938B (de) * 1983-06-24 1985-05-28 Philips Nv Schleifapparat

Also Published As

Publication number Publication date
IL74576A0 (en) 1985-06-30
KR850010622U (ko) 1985-12-30
BR8501077A (pt) 1985-10-29
ATE56645T1 (de) 1990-10-15
DE3587769D1 (de) 1994-04-07
AU3971985A (en) 1985-09-19
IL74576A (en) 1988-01-31
KR930007147Y1 (ko) 1993-10-13
JPH0741528B2 (ja) 1995-05-10
DE3587769T2 (de) 1994-09-29
CA1275809C (en) 1990-11-06
DE3579712D1 (de) 1990-10-25
CA1256292A (en) 1989-06-27
JPS618266A (ja) 1986-01-14
JPH02160462A (ja) 1990-06-20
NZ211349A (en) 1987-07-31
EP0349017A2 (de) 1990-01-03
EP0154967A3 (en) 1986-10-01
ATE102111T1 (de) 1994-03-15
AU577838B2 (en) 1988-10-06
EP0154967B1 (de) 1990-09-19
EP0349017A3 (en) 1990-12-05
JPH0661684B2 (ja) 1994-08-17
EP0154967A2 (de) 1985-09-18
ZA851702B (en) 1985-10-30

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