EP1187701B1 - Grinding wheel, grinding system and method for grinding a blade - Google Patents
Grinding wheel, grinding system and method for grinding a blade Download PDFInfo
- Publication number
- EP1187701B1 EP1187701B1 EP00929535A EP00929535A EP1187701B1 EP 1187701 B1 EP1187701 B1 EP 1187701B1 EP 00929535 A EP00929535 A EP 00929535A EP 00929535 A EP00929535 A EP 00929535A EP 1187701 B1 EP1187701 B1 EP 1187701B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinding
- mesh
- volume
- knife
- grinding wheel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
- B24D7/18—Wheels of special form
Definitions
- the invention relates to a grinding wheel and a grinding system with grinding wheels for sharpening a knife, in the surface of which by means of a plasma-supported Process foreign ions are stored, as well as a process for grinding a such a knife using grinding wheels.
- plastic or metal foils are known to be steel knives used, the surface of which is refined to increase the service life.
- Longitudinal cutting devices for webs are known to contain pairs Circular knives, each with a pair of circular knives severing the web in the longitudinal direction.
- Cross cutting machines for the production of single sheets from one Material web contain a cross cutting device with two knife drums that on their outer surface each with one or more over the drum length extending transverse knives are equipped.
- German patent application 198 40 950 there is a particularly advantageous knife described for cutting running material webs that a knife body with has a cutting edge made of steel, at least in the surface of the Cutting edge using a plasma-assisted process with foreign ions Penetration depth between 50 ⁇ m and 500 ⁇ m, preferably 100 ⁇ m to 200 ⁇ m, are stored.
- the doping with foreign ions in the metal lattice causes one for the Cutting optimal improvement in hardness without the steel becoming too brittle or ductility is affected.
- the invention is therefore based on the tasks of a grinding wheel Provide grinding system and a grinding process with which the in the German patent application 198 40 950 knife described with high quality let it grind.
- the first task is solved with a grinding wheel that uses silicon carbide as an abrasive in a grain size between 100 mesh and 500 mesh contains that in one Ceramic-based binder with aluminum silicate is incorporated, the pore volume of which is 45 to 70 percent by volume, the abrasive grains thermally cured bonded in the porous aluminum silicate bond and the concentration of the abrasive in the grinding wheel is more than one Volume percent.
- the concentration of the abrasive in the grinding wheel is preferably 30 to 55 By volume.
- the grinding system for solving the second task contains a first grinding wheel for pre-grinding with the features described above and a second Grinding wheel for polishing the cutting edge of the knife, used as an abrasive Corundum in a grain size between 400 mesh and 800 mesh, preferably with one medium grain size between 500 mesh and 700 mesh, in particular approx. 600 mesh, contains.
- the second grinding wheel for polishing preferably contains an abrasive which is in a binder made of a multi-component synthetic resin, preferably based on phenolic resin, with a concentration of more than one volume percent, preferably 30 up to 50 percent by volume, and polishing-active fillers with one Volume share between 3% and 10%.
- the procedure for sharpening a knife, for solving the third task is like this performed that the knife with a grinding wheel according to one of the claims 1 or 2 with a grinding speed of 5 m / s to 15 m / s, preferably 10 m / s, is ground.
- the knife is preferably first with a grinding wheel according to one of the Claims 1 or 2 with a grinding speed of 5 m / s to 15 m / s, preferably approx. 10 m / s, pre-ground. Then the second grinding wheel according to one of claims 3 or 4 with a grinding speed from 20 m / s to 30 m / s, preferably approx. 25 m / s, polished.
- the grinding system according to the invention contains two different grinding wheels in different compositions.
- the first grinding wheel is used for pre-grinding the knife, the second grinding wheel for polishing the cutting edges.
- Both grinding wheels have an outside diameter between 100 mm and 500 mm and contain an adapted mounting hole with a diameter between 20 mm and 150 mm, so that they are in the well-known grinding machines can be used.
- the thickness of the grinding wheels is between 8 mm and 40 mm.
- the first grinding wheel for pre-grinding contains silicon carbide in as an abrasive a grain size between 100 mesh and 500 mesh, preferably the average Grain size approx. 220 mesh.
- the abrasive is included in a ceramic-based binder Aluminum silicate stored.
- the abrasive grains are in this porous aluminum silicate bond thermally cured bonded.
- the curing temperature is 800 ° C -1500 ° C.
- the pore volume is preferably 45-70%.
- the concentration of the Abrasive in the grinding wheel is more than 1 volume percent, preferably 30 - 55% by volume.
- the second grinding wheel for polishing the cutting edges contains abrasives Corundum in a grain size between 400 mesh and 800 mesh, is preferably the average grain size between 500 mesh and 700 mesh, in particular about 600 Mesh.
- the abrasive is in a multi-component resin binder, preferably based on phenolic resin.
- the concentration of the Abrasive in the synthetic resin is more than 1 volume percent, preferably 30-50 %.
- the abrasive contains polishing fillers with a volume fraction between 3 % and 10%.
- the ion-implanted knives are ground with the grinding wheels at unusually low grinding speeds.
- the first grinding wheel is used to grind at a grinding speed of 5 m / s to 15 m / s, preferably approximately 10 m / s.
- the cutting edge is then polished with the second grinding wheel, the grinding speed being 20 m / s to 30 m / s, preferably approx. 25 m / s. In this way, ion-implanted knives can be ground with high quality.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
Die Erfindung betrifft eine Schleifscheibe und ein Schleifsystem mit Schleifscheiben zum Schleifen eines Messers, in dessen Oberfläche mittels eines plasmagestützten Verfahrens Fremdionen eingelagert sind, sowie ein Verfahren zum Schleifen eines derartigen Messers unter Verwendung von Schleifscheiben.The invention relates to a grinding wheel and a grinding system with grinding wheels for sharpening a knife, in the surface of which by means of a plasma-supported Process foreign ions are stored, as well as a process for grinding a such a knife using grinding wheels.
in Längsschneide- und Querschneidemaschinen zum Schneiden von Papier- oder Kartonbahnen, Kunststoff- oder Metallfolien werden bekannterweise Messer aus Stahl eingesetzt, deren Oberfläche zur Erhöhung der Standzeiten veredelt ist. Längsschneidevorrichtungen für Bahnen enthalten bekannterweise paarweise angeordnete Kreismesser, wobei jeweils ein Kreismesserpaar die Bahn in Längsrichtung durchtrennt. Querschneidemaschinen zur Herstellung von einzelnen Bögen aus einer Materialbahn enthalten eine Querschneidevorrichtung mit zwei Messertrommeln, die auf ihrer Mantelfläche jeweils mit einem oder mehreren über die Trommellänge erstreckenden Quermessern bestückt sind.in slitting and cross cutting machines for cutting paper or Cardboard webs, plastic or metal foils are known to be steel knives used, the surface of which is refined to increase the service life. Longitudinal cutting devices for webs are known to contain pairs Circular knives, each with a pair of circular knives severing the web in the longitudinal direction. Cross cutting machines for the production of single sheets from one Material web contain a cross cutting device with two knife drums that on their outer surface each with one or more over the drum length extending transverse knives are equipped.
In der deutschen Patentanmeldung 198 40 950 ist ein besonders vorteilhaftes Messer zum Schneiden laufender Materialbahnen beschrieben, das einen Messerkörper mit einer Schneidkante aus Stahl aufweist, wobei zumindest in die Oberfläche der Schneidkante mittels eines plasmagestützten Verfahrens Fremdionen mit einer Eindringtiefe zwischen 50 µm und 500 µm, vorzugsweise 100 µm bis 200 µm, eingelagert sind. Die Dotierung mit Fremdionen im Metallgitter bewirkt eine für das Schneiden optimale Verbesserung der Härte, ohne dass der Stahl zu spröde wird oder die Duktilität beeinflußt wird. In German patent application 198 40 950 there is a particularly advantageous knife described for cutting running material webs that a knife body with has a cutting edge made of steel, at least in the surface of the Cutting edge using a plasma-assisted process with foreign ions Penetration depth between 50 µm and 500 µm, preferably 100 µm to 200 µm, are stored. The doping with foreign ions in the metal lattice causes one for the Cutting optimal improvement in hardness without the steel becoming too brittle or ductility is affected.
In der Praxis hat es sich gezeigt, dass derartige Messer mit den bekannten Schleifscheiben und Schleifverfahren nur unbefriedigend geschliffen werden können, insbesondere brechen die Schneidkanten beim Schleifen aus.In practice it has been shown that such knives with the known grinding wheels and grinding processes can only be unsatisfactorily ground, in particular, the cutting edges break out during grinding.
Der Erfindung liegen daher die Aufgaben zugrunde, eine Schleifscheibe, ein Schleifsystem und ein Schleifverfahren bereitzustellen, mit dem sich die in der deutschen Patentanmeldung 198 40 950 beschriebenen Messer mit hoher Qualität schleifen lassen.The invention is therefore based on the tasks of a grinding wheel Provide grinding system and a grinding process with which the in the German patent application 198 40 950 knife described with high quality let it grind.
Die erste Aufgabe wird mit einer Schleifscheibe gelöst, die als Schleifmittel Siliziumkarbid in einer Korngröße zwischen 100 Mesh und 500 Mesh enthält, das in einem Bindemittel auf Keramikbasis mit Aluminiumsilikat eingelagert ist, dessen Porenvolumen 45 bis 70 Volumenprozent beträgt, wobei die Schleifmittelkömer in der porigen Aluminiumsilikatbindung thermisch ausgehärtet gebunden sind und die Konzentration des Schleifmittels in der Schleifscheibe mehr als ein Volumenprozent beträgt.The first task is solved with a grinding wheel that uses silicon carbide as an abrasive in a grain size between 100 mesh and 500 mesh contains that in one Ceramic-based binder with aluminum silicate is incorporated, the pore volume of which is 45 to 70 percent by volume, the abrasive grains thermally cured bonded in the porous aluminum silicate bond and the concentration of the abrasive in the grinding wheel is more than one Volume percent.
Bevorzugt beträgt die Konzentration des Schleifmittels in der Schleifscheibe 30 bis 55 Volumenprozent.The concentration of the abrasive in the grinding wheel is preferably 30 to 55 By volume.
Das Schleifsystem zur Lösung der zweiten Aufgabe enthält eine erste Schleifscheibe zum Vorschleifen mit dem vorstehend beschriebenen Merkmalen und eine zweite Schleifscheibe zum Polieren der Schneidkante des Messers, die als Schleifmittel Edelkorund in einer Komgröße zwischen 400 Mesh und 800 Mesh, bevorzugt mit einer mittlerer Korngröße zwischen 500 Mesh und 700 Mesh, insbesondere ca. 600 Mesh, enthält.The grinding system for solving the second task contains a first grinding wheel for pre-grinding with the features described above and a second Grinding wheel for polishing the cutting edge of the knife, used as an abrasive Corundum in a grain size between 400 mesh and 800 mesh, preferably with one medium grain size between 500 mesh and 700 mesh, in particular approx. 600 mesh, contains.
Bevorzugt enthält die zweite Schleifscheibe zum Polieren ein Schleifmittel, das in einem Bindemittel aus einem Mehrkomponenten-Kunstharz, bevorzugt auf Phenolharzbasis, mit einer Konzentration von mehr als einem Volumenprozent, bevorzugt 30 bis 50 Volumenprozent, eingelagert ist, und polieraktive Füllstoffe mit einem Volumenanteil zwischen 3 % und 10 %. The second grinding wheel for polishing preferably contains an abrasive which is in a binder made of a multi-component synthetic resin, preferably based on phenolic resin, with a concentration of more than one volume percent, preferably 30 up to 50 percent by volume, and polishing-active fillers with one Volume share between 3% and 10%.
Das Verfahren zum Schleifen eines Messers, zur Lösung der dritten Aufgabe wird so durchgeführt, daß das Messer mit einer Schleifscheibe gemäß einem der Patentansprüche 1 oder 2 mit einer Schleifgeschwindigkeit von 5 m/s bis 15 m/s, vorzugsweise 10 m/s, geschliffen wird.The procedure for sharpening a knife, for solving the third task, is like this performed that the knife with a grinding wheel according to one of the claims 1 or 2 with a grinding speed of 5 m / s to 15 m / s, preferably 10 m / s, is ground.
Bevorzugt wird das Messer zunächst mit einer Schleifscheibe gemäß einem der Patentansprüche 1 oder 2 mit einer Schleifgeschwindigkeit von 5 m/s bis 15 m/s, vorzugsweise ca. 10 m/s, vorgeschliffen. Anschließend wird mit der zweiten Schleifscheibe gemäß einem der Patentansprüche 3 oder 4 mit einer Schleifgeschwindigkeit von 20 m/s bis 30 m/s, vorzugsweise ca. 25 m/s, poliert.The knife is preferably first with a grinding wheel according to one of the Claims 1 or 2 with a grinding speed of 5 m / s to 15 m / s, preferably approx. 10 m / s, pre-ground. Then the second grinding wheel according to one of claims 3 or 4 with a grinding speed from 20 m / s to 30 m / s, preferably approx. 25 m / s, polished.
Das Schleifsystem nach der Erfindung enthält zwei verschiedene Schleifscheiben in verschiedenen Zusammensetzungen. Die erste Schleifscheibe dient zum Vorschleifen der Messer, die zweite Schleifscheibe zum Polieren der Schneidkanten.The grinding system according to the invention contains two different grinding wheels in different compositions. The first grinding wheel is used for pre-grinding the knife, the second grinding wheel for polishing the cutting edges.
Beide Schleifscheiben weisen einen Außendurchmesser zwischen 100 mm und 500 mm auf und enthalten eine angepaßte Aufnahmebohrung mit einem Durchmesser zwischen 20 mm und 150 mm, so dass sie in den bekannten Schleifmaschinen eingesetzt werden können. Die Dicke der Schleifscheiben beträgt zwischen 8 mm und 40 mm.Both grinding wheels have an outside diameter between 100 mm and 500 mm and contain an adapted mounting hole with a diameter between 20 mm and 150 mm, so that they are in the well-known grinding machines can be used. The thickness of the grinding wheels is between 8 mm and 40 mm.
Die erste Schleifscheibe für den Vorschliff enthält als Schleifmittel Siliziumkarbid in einer Korngröße zwischen 100 Mesh und 500 Mesh, bevorzugt beträgt die mittlere Komgröße ca. 220 Mesh. Das Schleifmittel ist in ein Bindemittel auf Keramikbasis mit Aluminiumsilikat eingelagert. Die Schleifmittelkörner sind in diese porige Aluminiumsilikatbindung thermisch ausgehärtet gebunden .Die Aushärtungstemperatur beträgt 800 °C -1500 °C. Das Porenvolumen beträgt bevorzugt 45 - 70 %. Die Konzentration des Schleifmittels in der Schleifscheibe beträgt mehr als 1 Volumenprozent, bevorzugt 30 - 55 Vol.-%.The first grinding wheel for pre-grinding contains silicon carbide in as an abrasive a grain size between 100 mesh and 500 mesh, preferably the average Grain size approx. 220 mesh. The abrasive is included in a ceramic-based binder Aluminum silicate stored. The abrasive grains are in this porous aluminum silicate bond thermally cured bonded.The curing temperature is 800 ° C -1500 ° C. The pore volume is preferably 45-70%. The concentration of the Abrasive in the grinding wheel is more than 1 volume percent, preferably 30 - 55% by volume.
Die zweite Schleifscheibe zum Polieren der Schneidkanten enthält als Schleifmittel Edelkorund in einer Korngröße zwischen 400 Mesh und 800 Mesh, bevorzugt beträgt die mittlere Korngröße zwischen 500 Mesch und 700 Mesh, insbesondere ca. 600 Mesh. Das Schleifmittel ist in einem Bindemittel aus einem Mehrkomponenten-Kunstharz, bevorzugt auf Phenolharzbasis, eingelagert. Die Konzentration des Schleifmittels in dem Kunstharz beträgt mehr als 1 Volumenprozent, bevorzugt 30 - 50 %. Das Schleifmittel enthält polieraktive Füllstoffe mit einem Volumenanteil zwischen 3 % und 10%.The second grinding wheel for polishing the cutting edges contains abrasives Corundum in a grain size between 400 mesh and 800 mesh, is preferably the average grain size between 500 mesh and 700 mesh, in particular about 600 Mesh. The abrasive is in a multi-component resin binder, preferably based on phenolic resin. The concentration of the Abrasive in the synthetic resin is more than 1 volume percent, preferably 30-50 %. The abrasive contains polishing fillers with a volume fraction between 3 % and 10%.
Das Schleifen der ionenimplantierten Messer mit den Schleifscheiben wird mit unüblich
niedrigen Schleifgeschwindigkeiten durchgeführt. Zunächst wird mit der ersten
Schleifscheibe mit einer Schleifgeschwindigkeit von 5 m/s bis 15 m/s, vorzugsweise ca.
10 m/s, vorgeschliffen. Anschließend wird mit der zweiten Schleifscheibe die
Schneidkante poliert, wobei die Schleifgeschwindigkeit 20 m/s bis 30 m/s, vorzugsweise
ca.
25 m/s, beträgt. Auf diese Weise lassen sich ionenimplantierte Messer mit hoher
Qualität schleifen.The ion-implanted knives are ground with the grinding wheels at unusually low grinding speeds. First, the first grinding wheel is used to grind at a grinding speed of 5 m / s to 15 m / s, preferably approximately 10 m / s. The cutting edge is then polished with the second grinding wheel, the grinding speed being 20 m / s to 30 m / s, preferably approx.
25 m / s. In this way, ion-implanted knives can be ground with high quality.
Claims (6)
- Grinding disc for grinding a knife, in the surface of which ions are incorporated by means of a plasma-aided process, having silicon carbide with a grain size between 100 mesh and 500 mesh as grinding agent, which is incorporated in a binder based on ceramic with aluminium silicate, whose pore volume is 45 to 70 per cent by volume, the grains of grinding agent in the porous aluminium silicate bond being bonded in a thermally hardened manner and the concentration of the grinding agent in the grinding disc being more than one per cent by volume.
- Grinding disc according to Claim 1, characterized in that the concentration of the grinding agent in the grinding disc is 30 to 55 per cent by volume.
- Grinding system having grinding discs for grinding a knife, in the surface of which ions are incorporated by means of a plasma-aided process, havinga first grinding disc for pregrinding according to one of Claims 1 or 2 anda second grinding disc for polishing the cutting edge of the knife, which as grinding agent contains high-grade corundum with a grain size between 400 mesh and 800 mesh, preferably with a mean grain size between 500 mesh and 700 mesh, in particular about 600 mesh.
- Grinding system according to Patent Claim 3, characterized in that the second grinding disc for polishing contains a grinding agent whichis incorporated in a binder made of a multicomponent synthetic resin, preferably based on phenolic resin, with a concentration of more than one per cent by volume, preferably 30 to 50 per cent by volume, andcontains active polishing fillers with a proportion by volume of between 3% and 10%.
- Method of grinding a knife, in the surface of which foreign ions are incorporated by means of a plasma-aided process, characterized in that the knife is ground with a cutting disc according to either of Patent Claims 1 and 2 at a grinding speed of 5 m/s to 15 m/s, preferably 10 m/s.
- Method according to Claim 5, characterized in that the knife is initially preground with a grinding disc according to either of Patent Claims 1 and 2 at a grinding speed of 5 m/s to 15 m/s, preferably about 10 m/s, and is then polished with the second grinding disc according to either of Patent Claims 3 and 4 at a grinding speed of 20 m/s to 30 m/s, preferably about 25 m/s.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19928022 | 1999-06-18 | ||
| DE19928022 | 1999-06-18 | ||
| DE10003707 | 2000-01-28 | ||
| DE10003707A DE10003707C2 (en) | 1999-06-18 | 2000-01-28 | Grinding wheel, grinding system and method for grinding a knife |
| PCT/EP2000/004450 WO2000078505A1 (en) | 1999-06-18 | 2000-05-17 | Grinding wheel, grinding system and method for grinding a blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1187701A1 EP1187701A1 (en) | 2002-03-20 |
| EP1187701B1 true EP1187701B1 (en) | 2003-01-22 |
Family
ID=26004087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00929535A Expired - Lifetime EP1187701B1 (en) | 1999-06-18 | 2000-05-17 | Grinding wheel, grinding system and method for grinding a blade |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6726542B1 (en) |
| EP (1) | EP1187701B1 (en) |
| JP (1) | JP2003502164A (en) |
| AT (1) | ATE231427T1 (en) |
| CA (1) | CA2375216A1 (en) |
| WO (1) | WO2000078505A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040192585A1 (en) | 2003-03-25 | 2004-09-30 | 3M Innovative Properties Company | Treatment for basal cell carcinoma |
| CN102019574B (en) * | 2010-12-10 | 2011-09-14 | 天津中环领先材料技术有限公司 | Wax-free polishing process of ultrathin zone-melting silicon polished slice |
| RU2532657C1 (en) * | 2013-06-13 | 2014-11-10 | Общество с ограниченной ответственностью "Производственно-техническое объединение "МЕДТЕХНИКА" (ООО "ПТО "МЕДТЕХНИКА") | Method for sharpening of cutting edge of microscissors |
| CN103600306A (en) * | 2013-11-21 | 2014-02-26 | 江苏苏北砂轮厂有限公司 | Ceramic grinding roll grinding wheel |
| CN105415209A (en) * | 2015-11-09 | 2016-03-23 | 无锡市锡山区仁景模具厂 | Novel grinding wheel for cutting |
| CN105415208A (en) * | 2015-11-09 | 2016-03-23 | 无锡市锡山区仁景模具厂 | Grinding wheel for cutting |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1937043A (en) * | 1929-04-29 | 1933-11-28 | Carborundum Co | Abrasive articles and solids of like constitution |
| US1935679A (en) * | 1931-10-27 | 1933-11-21 | Sergius A Vassiliev | Razor blade sharpener |
| US1966408A (en) * | 1932-03-17 | 1934-07-10 | Exolon Company | Bonded article and method of bonding the same |
| US2138829A (en) * | 1936-07-09 | 1938-12-06 | Carborundum Co | Manufacture of bonded abrasive articles |
| US2138882A (en) * | 1936-07-27 | 1938-12-06 | Carborundum Co | Abrasive |
| US2292758A (en) * | 1940-06-25 | 1942-08-11 | Charles E Hite | Vitrified abrasive wheel |
| US2408946A (en) * | 1944-07-17 | 1946-10-08 | Harold R Nelson | Polishing wheel and cement therefor |
| US3332173A (en) * | 1964-06-30 | 1967-07-25 | Cory Corp | Sharpener for cutting instruments |
| US3900636A (en) * | 1971-01-21 | 1975-08-19 | Gillette Co | Method of treating cutting edges |
| US3988955A (en) * | 1972-12-14 | 1976-11-02 | Engel Niels N | Coated steel product and process of producing the same |
| GB8821944D0 (en) * | 1988-09-19 | 1988-10-19 | Gillette Co | Method & apparatus for forming surface of workpiece |
| US5347887A (en) * | 1993-03-11 | 1994-09-20 | Microsurgical Techniques, Inc. | Composite cutting edge |
| US5724868A (en) * | 1996-01-11 | 1998-03-10 | Buck Knives, Inc. | Method of making knife with cutting performance |
| US5711774A (en) | 1996-10-09 | 1998-01-27 | Norton Company | Silicon carbide abrasive wheel |
| US5876470A (en) | 1997-08-01 | 1999-03-02 | Minnesota Mining And Manufacturing Company | Abrasive articles comprising a blend of abrasive particles |
-
2000
- 2000-05-17 JP JP2001504542A patent/JP2003502164A/en active Pending
- 2000-05-17 WO PCT/EP2000/004450 patent/WO2000078505A1/en active Search and Examination
- 2000-05-17 AT AT00929535T patent/ATE231427T1/en not_active IP Right Cessation
- 2000-05-17 CA CA002375216A patent/CA2375216A1/en not_active Abandoned
- 2000-05-17 EP EP00929535A patent/EP1187701B1/en not_active Expired - Lifetime
- 2000-05-17 US US10/018,633 patent/US6726542B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP1187701A1 (en) | 2002-03-20 |
| ATE231427T1 (en) | 2003-02-15 |
| US6726542B1 (en) | 2004-04-27 |
| CA2375216A1 (en) | 2000-12-28 |
| WO2000078505A1 (en) | 2000-12-28 |
| JP2003502164A (en) | 2003-01-21 |
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