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EP0099382A1 - Rolling sharpener for knives. - Google Patents

Rolling sharpener for knives.

Info

Publication number
EP0099382A1
EP0099382A1 EP83900422A EP83900422A EP0099382A1 EP 0099382 A1 EP0099382 A1 EP 0099382A1 EP 83900422 A EP83900422 A EP 83900422A EP 83900422 A EP83900422 A EP 83900422A EP 0099382 A1 EP0099382 A1 EP 0099382A1
Authority
EP
European Patent Office
Prior art keywords
knife
knife sharpener
grinding
sharpener according
sprockets
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.)
Granted
Application number
EP83900422A
Other languages
German (de)
French (fr)
Other versions
EP0099382B1 (en
Inventor
Udo Rieser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT83900422T priority Critical patent/ATE19983T1/en
Publication of EP0099382A1 publication Critical patent/EP0099382A1/en
Application granted granted Critical
Publication of EP0099382B1 publication Critical patent/EP0099382B1/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
    • B24D15/06—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges
    • B24D15/08—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors
    • B24D15/081—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors with sharpening elements in interengaging or in mutual contact

Definitions

  • the invention relates to a knife sharpener that can be rolled on a base according to the preamble of claim 1.
  • knife sharpeners have become known through the BE-PS 556718 and the DE-GM 1867 319 already arranged in pairs, resiliently pressed grinding wheels with intermeshing toothed rings, which form a V-shaped gap between them with mutually inclined peripheries. Through this the knife blade to be sharpened pulled while the grinding wheels are driven separately from it. A single work step is sufficient for sharpening, but the grind obtained with the grinding direction running parallel to the cutting edge is again only slightly durable.
  • the invention has for its object to provide a simple and easy to use knife sharpener, which results in a more durable cut. This object is achieved by the combination of features specified in claim 1.
  • the intermeshing toothed rings known per se are used in a new way, which does not allow any tangential relative movement to occur between the knife blade and the toothed ring.
  • the slight radial displacements which the cutting edge experiences during the continuous penetration between the mutually elastically pressed / pressed sprockets during the rolling process are sufficient to give it a sufficient grinding in the course of fewer reciprocating movements it is also more stable than the conventional cuts mentioned.
  • the latter is due to the fact that the grinding marks run perpendicular to the cutting edge, as is the case with factory grinding.
  • the subclaims indicate preferred design options for the invention. It has proven particularly expedient to produce the two ring gears separately from the roller rollers, which are generally made of plastic, from a ceramic abrasive material, for example based on aluminum oxide or from metal, which is coated with a suitable abrasive material. A corresponding preferred embodiment of the invention is described below with reference to the drawing. Of which shows
  • Fig. 2 in the upper half a side view and in the lower half a central longitudinal section through the knife sharpener in question.
  • the knife sharpener shown has two essentially the same, made of plastic rollers 2 and 4, which differ only in that the roller 2 has a threaded hole 6 in its center, the roller 4, however, has a somewhat further cylinder bore 8.
  • a screw bolt 16, locked by a lock nut 14, is screwed into the threaded bore 6, on which the roller 4 is axially displaceable and easily tiltable by means of its cylinder bore 8.
  • the screw bolt 16 has a flat head 18 on the underside, which can be accommodated in the annular extension 12.
  • the blind hole 10 of the roller 4 receives a helical spring 20 which tries to press the roller 4 against the roller 2.
  • the rollers 2 and 4 each have a flat groove 22, into which a rectangularly profiled rubber tire 24 is inserted as a friction lining.
  • the blind bore 10 of the roller 2 is closed by an elastic plug cap 26.
  • the two rollers 2 and 4 are arranged in mirror symmetry. While they are excluded on the outside for the purpose of saving material and weight, they have a continuous wall 28 at the height of the bore 6 or 8.
  • a flat, rectangularly profiled ring groove 30 is provided in the vicinity of its circumference, which has a separate ring gear 32 records.
  • the two mutually identical sprockets 32 are glued to the respective roller and each have about 25 teeth on their sides facing each other, with which they can interlock.
  • the periphery of the sprockets is conical, so that there is a V-shaped gap 36 between the two sprockets.
  • the two ring gears 32 either consist entirely of a ceramic abrasive material based on aluminum oxide and / or silicon carbide, or else of metal, which has a permanent, at least on the conical periphery and the opposing end faces 38.
  • Abrasive material coating is provided. Such consists for example of about 20% tungsten carbide, 40% silicon carbide and 40% of a ceramic binder, to which a hard chrome coating is applied. The tips and edges of the carbide crystals appear through the hard chrome coating in order to exert an excellent grinding effect, but the coating mentioned is very durable and relatively inexpensive to manufacture.
  • the knife sharpener described so far is placed upright on a flat surface, such as a table top, whereupon the knife blade to be sharpened is inserted from above through the V-shaped gap 36 between the two ring gears 32.
  • the two sprockets together with the subsequent rollers 2 and 4 are pushed apart a little in the area concerned, at most until the head 18 of the screw bolt 16 comes to rest on the base of the annular extension 12 (the screw bolt is adjusted accordingly).
  • the knife blade receives secure guidance. If the knife blade is now guided parallel to the base over it, the knife sharpener rolls on the base, the end faces 38 of the toothed rings 32 moving along the flanks of the knife blade. In this way, a sharper sharpening can be obtained quickly and reliably than, for example, by means of the knife sharpener mentioned at the beginning. But the knife sharpener described is just as light and handy and does not require a fixed attachment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

Aiguiseur de couteaux roulant posé sur un support et comportant deux rouleaux (2, 4) à ressorts en appui l'un contre l'autre de dimensions identiques et ayant essentiellement le même axe. Sur leurs côtés adjacents, les rouleaux comportent des couronnes coniques dentées (32) qui s'engrènent et qui, au moins sur les surfaces adjacentes des dents (38), se composent d'un matériau abrasif durable. La lame du couteau à aiguiser est introduite entre les deux courronnes dentées, celles-ci étant séparées par un écart approprié. L'effet d'aiguisage est obtenu grâce au mouvement relatif des surfaces des dents des couronnes dentées par rapport à la lame du couteau tirée ou poussée entre elles, alors que l'aiguiseur roule sur son appui.Rolling knife sharpener placed on a support and comprising two rollers (2, 4) with springs bearing against one another of identical dimensions and having essentially the same axis. On their adjacent sides, the rollers have conical toothed rings (32) which mesh and which, at least on the adjacent surfaces of the teeth (38), are made of a durable abrasive material. The blade of the sharpening knife is inserted between the two toothed crowns, the latter being separated by an appropriate gap. The sharpening effect is obtained thanks to the relative movement of the surfaces of the teeth of the toothed crowns with respect to the blade of the knife pulled or pushed between them, while the sharpener rolls on its support.

Description

Abwälzbarer Messerschärfer Passable knife sharpener
Die Erfindung betrifft einen auf einer Unterlage abwälzbaren Messerschärfer gemäß Gattungsbegriff des Patentanspruchs 1.The invention relates to a knife sharpener that can be rolled on a base according to the preamble of claim 1.
Bei einem aus der US-PS 2469 797 bekannten derartigen Messer schärfer ist eine regelrechte Schleifscheibe zwischen den bei den Wälzrollen federnd eingeschlossen, während die betreffenden Abstützflächen von konischen Metallkappen im Nabenbereich der Wälzrollen gebildet werden. Ähnlich verhält es sich bei Messerschärfern nach den US-PSen 2 498018 und 3 691700 mit dem Unterschied, daß hier die beiderseitigen Wälzrollen keiner Federkraft unterliegen und die Abstützflächen in die beiden Välzrollen integriert sind. In jedem Fall vird die zu schärfende Messerklinge in entsprechender Schräglage nacheinander durch die beiden links und rechts von der Schleifscheibe bestehenden, etva V-förmigen Schlitze hindurchgezogen, wobei der Messerschärfer auf der Unterlage, z.B. einem Tisch, zum Abrollen kommt. Dabei gleitet die betreffende Flanke der Schleifscheibe in erheblich wechselnder Richtung an der zu schleifenden Schneidkante entlang, wodurch sich ein nur wenig dauerhafter Anschliff ergibt. Dazu noch hat sich die Kotvendigkeit, das Messer in zwei aufeinander folgenden Arbeitsgängen zu schärfen, bei denen es zudem in entgegengesetzten Schräglagen gehalten werden muß, als nachteilig erwiesen.In a knife of this type known from US Pat. No. 2,469,797, a regular grinding wheel is resiliently enclosed between those in the roller rollers, while the support surfaces in question are formed by conical metal caps in the hub region of the roller rollers. The situation is similar for knife sharpeners according to US Pat. Nos. 2 498018 and 3 691700, with the difference that here the rolling rollers on both sides are not subject to spring force and the support surfaces are integrated in the two roller rollers. In any case, the knife blade to be sharpened is pulled successively through the two etva V-shaped slots on the left and right of the grinding wheel, with the knife sharpener on the base, e.g. a table that comes to roll. The flank of the grinding wheel in question slides along the cutting edge to be ground in a significantly alternating direction, which results in only a little permanent grinding. In addition, the need to sharpen the knife in two successive operations, in which it must also be held in opposite oblique positions, has proven to be disadvantageous.
Nun sind andererseits bei Messerschärfern durch die BE-PS 556718 und das DE-GM 1867 319 bereits paarweise angeordnete, federnd gegeneinander gedrückte Schleifscheiben mit stirnseitig ineinandergreifenden Zahnkränzen bekanntgeworden, die zwischen sich mit gegeneinander geneigten Peripherien einen V-förmigen Spalt bilden. Durch diesen wird die zu schärfende Messerklinge hindurchgezogen, während die Schleifscheiben separat hiervon angetrieben werden. Hierbei genügt für das Anschärfen zwar ein einziger Arbeitsgang, jedoch ist der so mit zur Schneidkante parallellaufender Schleifrichtung erhaltene Schliff wiederum nur wenig dauerhaft.Now, on the other hand, knife sharpeners have become known through the BE-PS 556718 and the DE-GM 1867 319 already arranged in pairs, resiliently pressed grinding wheels with intermeshing toothed rings, which form a V-shaped gap between them with mutually inclined peripheries. Through this the knife blade to be sharpened pulled while the grinding wheels are driven separately from it. A single work step is sufficient for sharpening, but the grind obtained with the grinding direction running parallel to the cutting edge is again only slightly durable.
Der Erfindung liegt die Aufgabe zugrunde, einen einfachen wie einfach zu gebrauchenden Messerschärfer zu schaffen, der einen dauerhafteren Schliff ergibt. Diese Aufgabe ist durch die im Anspruch 1 angegebene Merkmalskombination gelöst.The invention has for its object to provide a simple and easy to use knife sharpener, which results in a more durable cut. This object is achieved by the combination of features specified in claim 1.
Erfindungsgemäß werden die an sich bekannten ineinadergreifen den Zahnkränze in neuartiger Weise eingesetzt, die zwischen Messerklinge und Zahnkranz keine tangentialgerichtete Relativbewegung entstehen läßt. Es hat sich wider Erwarten gezeigt, daß bereits die geringen radialgerichteten Verschiebungen, die die Schneidkante beim fortgesetzten Eindringen zwischen die beiderseitigen elastisch gegeneinander/gedrückten Zahnkränze beim Abwälzvorgang erfährt, ausreicher, um ihr im Laufe weniger Hin- und Herbewegungen einen ausreichenden Anschliff zu verleihen, der dazu noch standfester ist als die genannten herkömmlichen Anschliffe. Letzteres ist darauf zurückzuführen, daß die Schleifspuren wie auch beim fabrikmäßigen Anschliff senkrecht zu der Schneidkante verlaufen.According to the invention, the intermeshing toothed rings known per se are used in a new way, which does not allow any tangential relative movement to occur between the knife blade and the toothed ring. Contrary to expectations, it has been shown that the slight radial displacements which the cutting edge experiences during the continuous penetration between the mutually elastically pressed / pressed sprockets during the rolling process are sufficient to give it a sufficient grinding in the course of fewer reciprocating movements it is also more stable than the conventional cuts mentioned. The latter is due to the fact that the grinding marks run perpendicular to the cutting edge, as is the case with factory grinding.
Die Unteransprüche geben bevorzugte Ausgestaltungsmöglichkeiten der Erfindung an. So hat es sich als besonders zweckmäßig erwiesen, die beiden Zahnkränze getrennt von den im allgemeinen aus Kunststoff bestehenden Wälzrollen aus einem keramischen Schleifmaterial etwa auf der Basis von Aluminiumoxid oder aus Metall herzustellen, das eine Beschichtung aus einem hierzu geeigneten Schleifmaterial erhält. Eine entsprechende bevorzugte Ausführungsform der Erfindung wird nachfolgend anhand der Zeichnung im einzelnen beschrieben. Hiervon zeigtThe subclaims indicate preferred design options for the invention. It has proven particularly expedient to produce the two ring gears separately from the roller rollers, which are generally made of plastic, from a ceramic abrasive material, for example based on aluminum oxide or from metal, which is coated with a suitable abrasive material. A corresponding preferred embodiment of the invention is described below with reference to the drawing. Of which shows
Eig. 1 in ihrer oberen Hälfte eine Vorderansicht des betreffenden Messerschärfers, in der unteren Hälfte dessen rückwärtigen Teil, undOwn 1 in its upper half a front view of the knife sharpener concerned, in the lower half of its rear part, and
Fig. 2 in der oberen Hälfte eine Seitenansicht und in der unteren Hälfte einen Mittellängsschnitt durch den betreffenden Messerschärfer.Fig. 2 in the upper half a side view and in the lower half a central longitudinal section through the knife sharpener in question.
Der gezeigte Messerschärfer weist zwei im wesentlichen gleiche, aus Kunststoff hergestellte Wälzrollen 2 und 4 auf,, die sich lediglich dadurch unterscheiden, daß die Wälzrolle 2 in ihrer Mitte eine Gewindebohrung 6, die Wälzrolle 4 indessen eine etwas weitere Zylinderbohrung 8 aufweist. Nach auswärts an die Bohrung 6 bzw. 8 schließt sich ein weiteres Sackloch 10 an, das an seinem Ende eine nochmalige ringförmige Erweiterung 12 besitzt. In die Gewindebohrung 6 ist ein durch eine Kontermutter 14 arretierter Schraubbolzen 16 eingeschraubt, auf dem die Rolle 4 mittels ihrer Zylinderbohrung 8 axialverschiebbar und leicht kippbar gelagert ist. Der Schraubbolzen 16 besitzt einen unterseitig flachen Kopf 18, der in der ringförmigen Erweiterung 12 Aufnahme finden kann. Das Sackloch 10 der Rolle 4 nimmt eine Wendelfeder 20 auf, die die Rolle 4 gegen die Rolle 2 zu drücken sucht. An ihrem Umfang besitzen die Rollen 2 und 4 jeweils eine flache Nut 22, in die ein rechteckig profilierter Gumm ireif 24 als Reibbelag eingelegt ist. Die Sackbohrung 10 der Rolle 2 ist durch eine elastische Steckkappe 26 verschlossen. Wie ersichtlich, sind die beiden Rollen 2 und 4 spiegelsymmetrisch angeordnet. Während sie zwecks Material- und Gewichtsersparnis außenseitig ausgenommen sind, besitzen sie in Höhe der Bohrung 6 bzw. 8 eine durchgehende Wandung 28. In dieser Wandung ist in der Nähe ihres Umfanges jeweils eine flache, rechteckig profilierte Ringnut 30 vorgesehen, die einen separaten Zahnkranz 32 aufnimmt. Die beiden einander gleichen Zahnkränze 32 sind mit der jeweiligen Rolle verklebt und weisen auf ihren einander zugekehrten Seiten jeweils etwa 25 Zähne auf, mit denen sie ineinanderzugreifen vermögen. Die Peripherie der Zahnkränze ist konisch gestaltet, so daß sich zwischen den beiden Zahnkränzen ein V-förmiger Spalt 36 ergibt. Die beiden Zahnkränze 32 bestehen entweder zur Gänze aus einem keramischen Schleifmaterial auf der Basis von Aluminiumoxid und/oder Siliziumkarbid oder aber aus Metall, das zumindest an der konischen Peripherie und den gegeneinander gerichteten Stirnseiten 38 mit einer dauerhaften. Schleifmaterial Beschichtung versehen ist. Eine solche besteht beispielsweise aus etwa 20 % Wolframkarbid, 40 % Siliziumkarbid und 40 % eines keramischen Bindemittels, worauf ein Hartchrom-Überzug aufgebracht ist. Die Spitzen und Kanten der Karbidkristalle treten durch den Hartchrom-Überzug hindurch in Erscheinung, um so eine vorzügliche Schleif wirkung auszuüben, während jedoch die genannte Beschichtung sehr dauerhaft und dazu noch verhältnismäßig preisgünstig herzustellen ist.The knife sharpener shown has two essentially the same, made of plastic rollers 2 and 4, which differ only in that the roller 2 has a threaded hole 6 in its center, the roller 4, however, has a somewhat further cylinder bore 8. To the outside of the bore 6 or 8, there is another blind hole 10, which has another annular extension 12 at its end. A screw bolt 16, locked by a lock nut 14, is screwed into the threaded bore 6, on which the roller 4 is axially displaceable and easily tiltable by means of its cylinder bore 8. The screw bolt 16 has a flat head 18 on the underside, which can be accommodated in the annular extension 12. The blind hole 10 of the roller 4 receives a helical spring 20 which tries to press the roller 4 against the roller 2. On their circumference, the rollers 2 and 4 each have a flat groove 22, into which a rectangularly profiled rubber tire 24 is inserted as a friction lining. The blind bore 10 of the roller 2 is closed by an elastic plug cap 26. As can be seen, the two rollers 2 and 4 are arranged in mirror symmetry. While they are excluded on the outside for the purpose of saving material and weight, they have a continuous wall 28 at the height of the bore 6 or 8. In this wall, a flat, rectangularly profiled ring groove 30 is provided in the vicinity of its circumference, which has a separate ring gear 32 records. The two mutually identical sprockets 32 are glued to the respective roller and each have about 25 teeth on their sides facing each other, with which they can interlock. The periphery of the sprockets is conical, so that there is a V-shaped gap 36 between the two sprockets. The two ring gears 32 either consist entirely of a ceramic abrasive material based on aluminum oxide and / or silicon carbide, or else of metal, which has a permanent, at least on the conical periphery and the opposing end faces 38. Abrasive material coating is provided. Such consists for example of about 20% tungsten carbide, 40% silicon carbide and 40% of a ceramic binder, to which a hard chrome coating is applied. The tips and edges of the carbide crystals appear through the hard chrome coating in order to exert an excellent grinding effect, but the coating mentioned is very durable and relatively inexpensive to manufacture.
Beim Gebrauch wird der so weit beschriebene Messerschärfer auf eine ebene Unterlage, wie z.B. eine Tischplatte stehend aufgelegt, worauf die zu schärfende Messerklinge von oben durch den V-förmigen Spalt 36 zwischen die beiden Zahnkränze 32 eingeführt wird. Dabei werden die beiden Zahnkränze mitsamt den anschließenden Rollen 2 und 4 in dem betreffenden Bereich etwas auseinandergedrängt, maximal so weit bis der Kopf 18 des Schraubbolzens 16 auf dem Grund der ringförmigen Erweiterung 12 zur Auflage kommt (entsprechend wird der Schraubbolzen eingestellt). Auf diese Weise erhält die Messerklinge eine sichere Führung. Wenn nun die Messerklinge parallel zu der Unterlage über diese hingeführt wird, wälzt sich der Messerschärfer auf der Unterlage ab, wobei die Stirnflächen 38 der Zahnkränze 32 sich schleifend an den Flanken der Messerklinge entlangbewegen. Auf diese Weise kann rasch und zuverlässig ein wesentlich schärferer Schliff erhalten werden, als etwa mittels des eingangs genannten Messerschärfers. Dabei aber ist der beschriebene Messerschärfer ebenso leicht und handlich und bedarf keiner festen Anbringung. In use, the knife sharpener described so far is placed upright on a flat surface, such as a table top, whereupon the knife blade to be sharpened is inserted from above through the V-shaped gap 36 between the two ring gears 32. The two sprockets together with the subsequent rollers 2 and 4 are pushed apart a little in the area concerned, at most until the head 18 of the screw bolt 16 comes to rest on the base of the annular extension 12 (the screw bolt is adjusted accordingly). To this In this way, the knife blade receives secure guidance. If the knife blade is now guided parallel to the base over it, the knife sharpener rolls on the base, the end faces 38 of the toothed rings 32 moving along the flanks of the knife blade. In this way, a sharper sharpening can be obtained quickly and reliably than, for example, by means of the knife sharpener mentioned at the beginning. But the knife sharpener described is just as light and handy and does not require a fixed attachment.

Claims

Patentansprüche: Claims:
1. Auf einer Unterlage abwälzbarer Messerschärfer mit zwei im wesentlichen gleichachsig angeordneten, gleichgroßen, federnd gegeneinandergedrückten Wälzrollen, die zwischen sich Schleif- und Abstützflächen für die Messerschneide aufweisen, dadurch g e k e nn z e i c h n e t , daß die Schleifflächen zugleich mit den konischen Abstützflächen von stirnseitig ineinandergreifenden Zahnkränzen (32) an den beiden Wälzrollen (2, 4) gebildet werden, und diese Zahnkränze hierzu mit gegeneinandergeneigten Peripherien einen etwa V-förmigen Spalt (36) bilden sowie zumindest an ihren einander zugekehrten Stirnflächen (38) aus einem Schleifmaterial bestehen.1. Knife sharpeners that can be rolled off with two essentially coaxial, equal-sized, resiliently pressed roller rollers that have grinding and support surfaces for the knife edge between them, characterized in that the grinding surfaces simultaneously with the conical support surfaces of intermeshing sprockets ( 32) are formed on the two roller rollers (2, 4), and these sprockets for this purpose form an approximately V-shaped gap (36) with peripheries inclined towards one another and at least on their mutually facing end faces (38) consist of an abrasive material.
2. Messerschärfer nach Anspruch 1, dadurch g e k e n n z e i c hn e t , daß die beiden Zahnkränze (32) jeweils zwischen 15 und 60 Zähnen, vorzugsweise etwa 25 Zähne, aufweisen.2. Knife sharpener according to claim 1, characterized in that the two sprockets (32) each have between 15 and 60 teeth, preferably about 25 teeth.
3. Messerschärfer nach Anspruch 1 oder 2, dadurch g e k e n n z e i c h n e t , daß die beiden Zahnkränze (32) aus einem keramischen Schleifmaterial, vorzugsweise auf der Basis von Aluminiumoxid und/oder Siliziumkarbid, bestehen.3. Knife sharpener according to claim 1 or 2, characterized in that the two ring gears (32) consist of a ceramic grinding material, preferably based on aluminum oxide and / or silicon carbide.
4. Messerschärfer nach Anspruch 1 oder 2, dadurch g e k en n z e i c h n e t , daß die beiden Zahnkränze (32) aus Metall bestehen und mit dem Schleifmaterial beschichtet sind.4. Knife sharpener according to claim 1 or 2, characterized in that the two ring gears (32) consist of metal and are coated with the grinding material.
5. Messerschärfer nach Anspruch 4, dadurch g e k e n n z e i c h n e t , daß die Schleifmaterialschicht aus einer Schicht der Zusammensetzung 10 bis 30 % Wolframkarbid, 20 bis 50 % Siliziumkarbid und 30 bis 50 % eines keramischen Bindemittels, vorzugsweise etwa 20 % Wolframkarbid, 40 % Siliziumkarbid und 40 % des keramischen Bindemittels, besteht, auf die eine Hartchromschicht aufgebracht ist. 5. Knife sharpener according to claim 4, characterized in that the abrasive material layer consists of a layer of the composition 10 to 30% tungsten carbide, 20 to 50% silicon carbide and 30 to 50% of a ceramic binder, preferably about 20% tungsten carbide, 40% silicon carbide and 40% of the ceramic binder, on which a hard chrome layer is applied.
6. Messerschärfer nach einem der vorhergehenden Ansprüche, dadurch g e k e n n z e i c h n e t, daß die beiden Wälzrollen (2, 4) selbst in an sich bekannter Weise aus Kunststoff bestehen und an ihrem Umfang einen Reibbelag (24) aus Gummi oder dergl. aufweisen. 6. Knife sharpener according to one of the preceding claims, characterized in that the two roller rollers (2, 4) themselves are made of plastic in a manner known per se and have a friction lining (24) made of rubber or the like on their circumference.
EP83900422A 1982-01-28 1983-01-27 Rolling sharpener for knives Expired EP0099382B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83900422T ATE19983T1 (en) 1982-01-28 1983-01-27 ROLLABLE KNIFE SHARPENER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823202742 DE3202742A1 (en) 1982-01-28 1982-01-28 KNIFE SHARPENER
DE3202742 1982-01-28

Publications (2)

Publication Number Publication Date
EP0099382A1 true EP0099382A1 (en) 1984-02-01
EP0099382B1 EP0099382B1 (en) 1986-05-28

Family

ID=6154138

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83900422A Expired EP0099382B1 (en) 1982-01-28 1983-01-27 Rolling sharpener for knives

Country Status (4)

Country Link
US (1) US4672778A (en)
EP (1) EP0099382B1 (en)
DE (2) DE3202742A1 (en)
WO (1) WO1983002581A1 (en)

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US20010049255A1 (en) * 1999-12-30 2001-12-06 Todd Jones Knife-edge sharpening apparatus
CA2686670C (en) * 2002-01-17 2012-09-25 Iggesund Tools Ab Multi-application wood working knife and clamping assembly
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DE3202742A1 (en) 1983-08-04
EP0099382B1 (en) 1986-05-28
DE3363626D1 (en) 1986-07-03
WO1983002581A1 (en) 1983-08-04
US4672778A (en) 1987-06-16

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