EP1510303B1 - Knife - Google Patents

Knife Download PDF

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Publication number
EP1510303B1
EP1510303B1 EP03019863A EP03019863A EP1510303B1 EP 1510303 B1 EP1510303 B1 EP 1510303B1 EP 03019863 A EP03019863 A EP 03019863A EP 03019863 A EP03019863 A EP 03019863A EP 1510303 B1 EP1510303 B1 EP 1510303B1
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EP
European Patent Office
Prior art keywords
knife
cutting edge
depressions
blade surface
blade
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
Application number
EP03019863A
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German (de)
French (fr)
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EP1510303A1 (en
Inventor
Rolf Dums
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.)
WMF Group GmbH
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WMF Group GmbH
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
Priority to AT03019863T priority Critical patent/ATE345906T1/en
Application filed by WMF Group GmbH filed Critical WMF Group GmbH
Priority to EP03019863A priority patent/EP1510303B1/en
Priority to DE50305760T priority patent/DE50305760D1/en
Priority to ES03019863T priority patent/ES2275984T3/en
Priority to JP2004112440A priority patent/JP3759943B2/en
Priority to RU2004113297/02A priority patent/RU2277468C2/en
Priority to SG200402995A priority patent/SG121888A1/en
Publication of EP1510303A1 publication Critical patent/EP1510303A1/en
Application granted granted Critical
Publication of EP1510303B1 publication Critical patent/EP1510303B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26BHAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B9/00Blades for hand knives
    • B26B9/02Blades for hand knives characterised by the shape of the cutting edge, e.g. wavy

Definitions

  • the invention relates to a knife, in particular a household knife, the type explained in the preamble of claim 1.
  • Such a knife is known from US-A-1 793 171.
  • a knife is to be created which, despite molded-in depressions on the cutting edge, retains a straight cutting edge. Consequently, the recesses are incorporated into the material only so far from one blade surface in the direction of the other blade surface that they do not exit on the other blade surface.
  • the recesses are produced by a grinding wheel whose grinding edge has a substantially semicircular cross-section.
  • the desired razor sharp cutting edge results only in the central region of the recess, between the central regions of two adjacent wells a stronger cutting edge remains, the less for Tailoring contributes, but also less wears. In contrast, the razor-sharp area will wear out more, so that after a few cuts the effect of depressions fizzles.
  • serrated knives are also available in many other shapes on the market.
  • the most common serrated edge includes a plurality of adjacent recesses, which are so far incorporated only in one of the blade surface in the material that they emerge on the opposite blade surface, resulting in a curved cutting edge.
  • Such a cutting edge has advantages in terms of cutting the material, because the serrated edge provides a cutting edge on the sides of the sheet which is transverse to the normal direction of movement of the knife during cutting, thus greatly facilitating the cutting of transverse fibers so that the cut becomes smoother ,
  • the cutting edge is shifted to a slightly oblique position on the one hand, which increases the cutting width;
  • the cutting edges can not be optimally sharpened.
  • the invention is therefore based on the object to provide a simple and inexpensive to produce knife with improved cutting performance.
  • the inventive design the advantages in terms of a sharper cutting edge and pointing in the direction of movement of the knife edge portions of a serrated edge, without the disadvantages would be noted. Rather, the cutting edge of the knife according to the invention is symmetrical with respect to the median plane, wherein the cutting edge can be ground razor sharp on their vast area.
  • the recesses are particularly preferably rounded and placed so that the cutting edge is curved in a side view of the blade surface.
  • uniformly deep bends can be created by substantially uniform pits, however, for particular applications or to form cutting sections with special function, the bends can also become different depths.
  • a particular advantage of the embodiment according to the invention lies in the fact that it is also possible to form the cutting edge reciprocally in plan view, preferably also in a curved manner.
  • the crumb firmness Of knives greatly improved, which can be achieved for example a particularly smooth cut in bread.
  • the tip between the recesses makes it easier to scrape and cut particularly smooth surfaces, such as bread crust or the skin of fruits and vegetables.
  • Fig. 1 shows a knife 1, which is designed for cutting food, in particular as a household knife.
  • the knife 1 contains the usual knife handle 2, to which a cutting area in the form of a knife blade 3 of the usual outer shape is attached.
  • the knife blade 3 can be made of any material suitable for knives and preferably consists of a steel, rust-resistant and / or nachschleifbar.
  • the knife 1 is designed as a household knife, in particular as a bread knife, wherein the blade 3 has a sufficiently large length of for example 20 cm.
  • the invention is also applicable to other household knives having different blade shapes, straight or curved cutting edges and other dimensions, and cutting areas in the form of a disc knife, for example for bread slicing machines.
  • the blade 3, as well as Figs. 2 to 4 show two blade surfaces 3a and 3b, which are symmetrically opposite to each other on a median plane 4.
  • the two blade surfaces 3a and 3b in the illustrated embodiment include a wedge angle ⁇ between them, and converge in an imaginary vertex line 3c, which lies in the median plane 4.
  • the blade 3 is provided in the vicinity of the imaginary vertex line 3 c of the blade surfaces 3 a and 3 b with a cutting edge 5 having a serrated edge 6.
  • the serrated edge 6 extends almost over the entire longitudinal extent of the blade 3, wherein only a puncture region at the tip of the blade and a region in the vicinity of the handle 2 has a conventional straight cutting edge.
  • the arrangement of the serrated edge 6 can be changed and adapted to special cutting functions.
  • the serrated edge 6 contains a multiplicity of indentations 6a, 6b which are machined next to each other and alternately once in one knife surface 3a and then in the other knife surface 3b.
  • the recesses 6a, 6b are substantially identical in their dimensions along the apex edge 3c, the term "substantially” comprising unavoidable manufacturing variations that are unavoidable in such thinly ground materials.
  • the recesses 6a, 6b are immediately adjacent and alternately on opposite blade surfaces 3a, 3b.
  • each of the depressions 6a, 6b extends in the direction of the opposite blade surface 3b or 3a beyond the center plane 4 and through the opposite blade surface, so that tips 7 are formed between adjacent depressions 6a, 6b on the different blade surfaces 3a, 3b , which lie substantially in the median plane 4 and the imaginary vertex edge 3c, while the cutting edge 5 between two tips 7 first drops and then rises again.
  • the recess 6a is formed in the blade surface 3a so as to exit on the opposite blade surface 3b at a distance from the apex line 3c, which in the FIG Substantially corresponds to the distance with which the machined into the opposite blade surface 3b recess 6b on the blade surface 3a exits.
  • the recesses 6a and 6b are rounded, in the illustrated embodiment with a semicircular grinding tool, so that there is a semicircular boundary line 8 to the respective blade surface, and they have in the direction of the apex line 3c an increasing penetration depth in the blade surface.
  • rounded recesses 6a, 6b provide a curved or curving sloping and rising cutting edge 5 with arcs interrupted by tips 7 and curved away from the apex line 3c. Since the depressions 6a, 6b are arranged substantially identically and uniformly, since the depressions 6a, 6b continue to extend in each case substantially by the same amount over the center plane 4, the result is a substantially equal, identically shaped and by points 7 mutually separated sheets existing cutting edge 5, when viewed in side view of one of the blade surfaces 3a, 3b.
  • the serrated edge according to the invention can be provided only partially on the blade.
  • the depressions may have other shapes, for example, be formed as trapezoidal or V-shaped notches, which then leads to a substantially zigzag course of the cutting edge, both in plan view of the cutting edge and in side view of the blade surface.
  • the indentations need not necessarily be formed the same length over the entire length of the blade and on both blade surfaces and be equally spaced. It is also possible to leave between adjacent, arranged on different sides of the blade wells instead of the tips larger rectilinear portions of the cutting edge.
  • the wells can also be rounded with other uniform or composite radii, so that instead of the drawn arcuate boundary line to the respective blade surface, which leads to a circular arc shape of the cutting edge in plan view and side view, results in a part of an ellipse formed boundary line or a boundary line with a different shape.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)
  • Surgical Instruments (AREA)
  • Food-Manufacturing Devices (AREA)

Abstract

Knife (1), especially a household knife, comprises a cutting region (3) provided with an undulating section (6) and two knife surfaces (3a), each extending along one side of a central plane. The undulating section has recesses (6a, 6b) molded on both sides of the central plane alternately in one or the other knife surface. The recesses extend from one knife surface in the direction of the other knife surface as far as the central plane to form a cutting edge (5) that runs toward and away from the knife surface. Preferred Features: The recesses are rounded.

Description

Die Erfindung bezieht sich auf ein Messer, insbesondere ein Haushaltsmesser, der im Oberbegriff von Anspruch 1 erläuterten Art.The invention relates to a knife, in particular a household knife, the type explained in the preamble of claim 1.

Ein derartiges Messer ist aus der US-A-1 793 171 bekannt. In dieser Druckschrift wird es als nachteilig angesehen, dass bekannte Wellenschliffe am Messer eine ausgebogene oder auf- und abgehende Schneidkante hinterlassen. Dagegen soll laut dieser Druckschrift ein Messer geschaffen werden, das trotz eingeformter Vertiefungen an der Schneidkante eine geradlinig durchlaufende Schneidkante behält. Die Vertiefungen werden demzufolge nur so weit von einer Messerfläche in Richtung auf die andere Messerfläche in das Material eingearbeitet, dass sie auf der anderen Messerfläche nicht austreten. Die Vertiefungen werden durch eine Schleifscheibe erzeugt, deren Schleifkante einen im Wesentlichen halbkreisförmigen Querschnitt aufweist. Schleift man mit dieser Schleifscheibe die Vertiefungen abwechselnd mal in die eine und anschließend in die andere Messerfläche ein, so ergibt sich die angestrebte rasiermesserscharfe Schneidkante nur im mittleren Bereich der Vertiefung, wobei zwischen den mittleren Bereichen zweier benachbarter Vertiefungen eine stärkere Schneidkante verbleibt, die weniger zum Schneiderfolg beiträgt, aber auch weniger verschleißt. Dagegen wird sich der rasiermesserscharfe Bereich stärker abnutzen, so dass nach wenigen Schnitten der Effekt der Vertiefungen verpufft.Such a knife is known from US-A-1 793 171. In this document, it is considered disadvantageous that known serrations on the knife leave a scalloped or up and down cutting edge. By contrast, according to this document, a knife is to be created which, despite molded-in depressions on the cutting edge, retains a straight cutting edge. Consequently, the recesses are incorporated into the material only so far from one blade surface in the direction of the other blade surface that they do not exit on the other blade surface. The recesses are produced by a grinding wheel whose grinding edge has a substantially semicircular cross-section. If you grind the wells alternately times in one and then in the other blade surface with this grinding wheel, the desired razor sharp cutting edge results only in the central region of the recess, between the central regions of two adjacent wells a stronger cutting edge remains, the less for Tailoring contributes, but also less wears. In contrast, the razor-sharp area will wear out more, so that after a few cuts the effect of depressions fizzles.

Wellenschliffmesser sind jedoch auch in vielen anderen Formen auf dem Markt. Der am weitesten verbreitete Wellenschliff enthält eine Vielzahl nebeneinander liegender Vertiefungen, die nur von einer Messerfläche her so weit in das Material eingearbeitet sind, dass sie auf der gegenüberliegenden Messerfläche austreten, wodurch sich eine bogige Schneidkante ergibt. Eine derartige Schneidkante hat Vorteile im Hinblick auf das Durchtrennen des Materials, da der Wellenschliff eine Schneidkante an den Seiten des Bogens bereitstellt, die quer zur normalen Bewegungsrichtung des Messers beim Schneiden verläuft und somit das Durchtrennen querverlaufender Fasern stark erleichtert, so dass der Schnitt glatter wird. Durch die nur einseitig angebrachten Vertiefungen verlagert sich jedoch zum einen die Schnittkante in eine leicht schräge Position, was die Schnittbreite vergrößert; zum anderen sind die Schneidkanten bedingt durch die Geometrie nicht optimal scharf zu bekommen.However, serrated knives are also available in many other shapes on the market. The most common serrated edge includes a plurality of adjacent recesses, which are so far incorporated only in one of the blade surface in the material that they emerge on the opposite blade surface, resulting in a curved cutting edge. Such a cutting edge has advantages in terms of cutting the material, because the serrated edge provides a cutting edge on the sides of the sheet which is transverse to the normal direction of movement of the knife during cutting, thus greatly facilitating the cutting of transverse fibers so that the cut becomes smoother , However, due to the recesses, which are attached only on one side, the cutting edge is shifted to a slightly oblique position on the one hand, which increases the cutting width; On the other hand, due to the geometry, the cutting edges can not be optimally sharpened.

Man hat deshalb bereits versucht, Messer mit einem einseitigen Wellenschliff auf der gegenüberliegenden Messerfläche mit einer glatt durchlaufenden Schlifffläche gegenzuschleifen, was zwar die Schnittbreite etwas verringert, im Hinblick auf die Schnittleistung noch nicht optimal ist.It has therefore already tried to counter-knife with a one-sided serrated edge on the opposite blade surface with a smooth sweeping surface, which although the cutting width slightly reduced, in terms of cutting performance is not optimal.

Der Erfindung liegt somit die Aufgabe zugrunde, ein einfach und kostengünstig herstellbares Messer mit einer verbesserten Schnittleistung zu schaffen.The invention is therefore based on the object to provide a simple and inexpensive to produce knife with improved cutting performance.

Die Aufgabe wird durch die im Anspruch 1 angegebene Erfindung gelöst.The object is solved by the invention defined in claim 1.

Durch die erfindungsgemäße Ausgestaltung ergeben sich die Vorteile im Hinblick auf eine schärfere Schneide und der in Bewegungsrichtung des Messers weisenden Schneidenbereiche eines Wellenschliffs, ohne dass dessen Nachteile zu bemerken wären. Vielmehr liegt die Schneidkante des erfindungsgemäßen Messers symmetrisch bezüglich der Mittelebene, wobei die Schneidkante auf ihren überwiegenden Bereich rasiermesserscharf ausgeschliffen werden kann.The inventive design, the advantages in terms of a sharper cutting edge and pointing in the direction of movement of the knife edge portions of a serrated edge, without the disadvantages would be noted. Rather, the cutting edge of the knife according to the invention is symmetrical with respect to the median plane, wherein the cutting edge can be ground razor sharp on their vast area.

Vorteilhafte Weiterbildungen sind den Unteransprüchen zu entnehmen.Advantageous developments can be found in the dependent claims.

Die Vertiefungen sind besonders bevorzugt ausgerundet und so gelegt, dass die Schneidkante in Seitenansicht auf die Messerfläche bogig verläuft.The recesses are particularly preferably rounded and placed so that the cutting edge is curved in a side view of the blade surface.

Darüber hinaus können gleichmäßig tiefe Bögen durch im Wesentlichen gleichmäßige Vertiefungen erzeugt werden, für bestimmte Anwendungszwecke oder zum Ausbilden von Schneidbereichen mit Sonderfunktion können die Bögen jedoch auch unterschiedlich tief werden.Moreover, uniformly deep bends can be created by substantially uniform pits, however, for particular applications or to form cutting sections with special function, the bends can also become different depths.

Ein besonderer Vorteil der erfindungsgemäßen Ausgestaltung liegt darin, dass man auch die Schneidkante in Draufsicht hin- und hergehend, bevorzugt ebenfalls bogig, ausbilden kann. Durch diese Ausgestaltung wird insbesondere die Krümelfestigkeit von Messern stark verbessert, wodurch z.B. bei Brot ein besonders glatter Schnitt erzielt werden kann.A particular advantage of the embodiment according to the invention lies in the fact that it is also possible to form the cutting edge reciprocally in plan view, preferably also in a curved manner. By this configuration, in particular the crumb firmness Of knives greatly improved, which can be achieved for example a particularly smooth cut in bread.

Die zwischen den Vertiefungen liegende Spitze erleichtert entscheidend das Anritzen und Einschneiden besonders glatter Oberflächen, wie beispielsweise Brotrinde oder die Haut von Früchten und Gemüse.The tip between the recesses makes it easier to scrape and cut particularly smooth surfaces, such as bread crust or the skin of fruits and vegetables.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnungen näher erläutert. Es zeigen:

Fig. 1
eine perspektivische Darstellung eines erfindungsgemäß ausgebildetenen Messers,
Fig. 2
ein stark vergrößerter Ausschnitt aus der Messerklinge des Messers gemäß Fig. 1,
Fig. 3
eine Querschnittsdarstellung der Fig. 2, und
Fig. 4
eine stark vergrößerte Draufsicht auf die Schneidkante.
An embodiment of the invention will be explained in more detail with reference to the drawings. Show it:
Fig. 1
a perspective view of an inventively designed knife,
Fig. 2
a greatly enlarged section of the knife blade of the knife of FIG. 1,
Fig. 3
a cross-sectional view of Fig. 2, and
Fig. 4
a greatly enlarged plan view of the cutting edge.

Fig. 1 zeigt ein Messer 1, das zum Schneiden von Lebensmitteln, insbesondere als Haushaltsmesser ausgebildet ist. Das Messer 1 enthält den üblichen Messergriff 2, an dem ein Schneidbereich in Form einer Messerklinge 3 der üblichen äußeren Gestalt befestigt ist. Die Messerklinge 3 kann aus jedem für Messer geeigneten Materialien hergestellt sein und besteht bevorzugt aus einem Stahl, rostbeständig und/oder nachschleifbar.Fig. 1 shows a knife 1, which is designed for cutting food, in particular as a household knife. The knife 1 contains the usual knife handle 2, to which a cutting area in the form of a knife blade 3 of the usual outer shape is attached. The knife blade 3 can be made of any material suitable for knives and preferably consists of a steel, rust-resistant and / or nachschleifbar.

Im dargestellten Ausführungsbeispiel ist das Messer 1 als Haushaltsmesser, insbesondere als Brotmesser ausgebildet, wobei die Klinge 3 eine ausreichend große Länge von beispielsweise 20 cm aufweist. Die Erfindung ist jedoch auch auf andere Haushaltsmesser mit unterschiedlichen Klingenformen sowie geradlinig oder gekrümmt verlaufenden Schneidkanten und anderen Abmessungen und auf Schneidbereiche in Form eines Scheibenmessers, beispielsweise für Brotschneidemaschinen, anwendbar.In the illustrated embodiment, the knife 1 is designed as a household knife, in particular as a bread knife, wherein the blade 3 has a sufficiently large length of for example 20 cm. However, the invention is also applicable to other household knives having different blade shapes, straight or curved cutting edges and other dimensions, and cutting areas in the form of a disc knife, for example for bread slicing machines.

Die Klinge 3 weist, wie auch die Fig. 2 bis 4 zeigen, zwei Messerflächen 3a und 3b auf, die sich symmetrisch beidseitig einer Mittelebene 4 gegenüberliegen. Die beiden Messerflächen 3a und 3b schließen im dargestellten Ausführungsbeispiel einen Keilwinkel α zwischen sich ein, und laufen in einer imaginären Scheitellinie 3c zusammen, die in der Mittelebene 4 liegt.The blade 3, as well as Figs. 2 to 4 show two blade surfaces 3a and 3b, which are symmetrically opposite to each other on a median plane 4. The two blade surfaces 3a and 3b in the illustrated embodiment include a wedge angle α between them, and converge in an imaginary vertex line 3c, which lies in the median plane 4.

Die Klinge 3 ist in der Nähe der imaginären Scheitellinie 3c der Messerflächen 3a und 3b mit einer Schneidkante 5 versehen, die einen Wellenschliff 6 aufweist. Im dargestellten Ausführungsbeispiel erstreckt sich der Wellenschliff 6 fast über die gesamte Längserstreckung der Klinge 3, wobei nur ein Einstichbereich an der Spitze der Klinge und ein Bereich in der Nähe des Griffes 2 eine übliche gerade Schneidkante aufweist. Die Anordnung des Wellenschliffs 6 kann jedoch verändert und an besondere Schneidfunktionen angepasst werden.The blade 3 is provided in the vicinity of the imaginary vertex line 3 c of the blade surfaces 3 a and 3 b with a cutting edge 5 having a serrated edge 6. In the illustrated embodiment, the serrated edge 6 extends almost over the entire longitudinal extent of the blade 3, wherein only a puncture region at the tip of the blade and a region in the vicinity of the handle 2 has a conventional straight cutting edge. However, the arrangement of the serrated edge 6 can be changed and adapted to special cutting functions.

Wie auch in Verbindung mit den Fig. 2 bis 4 ersichtlich, enthält der Wellenschliff 6 eine Vielzahl von Vertiefungen 6a, 6b, die nebeneinander und abwechselnd einmal in die eine Messerfläche 3a und anschließend in die andere Messerfläche 3b eingearbeitet sind. Die Vertiefungen 6a, 6b sind in ihren Abmessungen entlang der Scheitelkante 3c im Wesentlichen identisch, wobei der Begriff "im Wesentlichen" unvermeidbare Herstellungsabweichungen umfasst, die bei derartigen dünn ausgeschliffenen Materialien unvermeidlich sind. Die Vertiefungen 6a, 6b liegen unmittelbar benachbart und abwechselnd auf gegenüberliegenden Messerflächen 3a, 3b. Jede der Vertiefungen 6a, 6b erstreckt sich jedoch in Richtung auf die gegenüberliegende Messerfläche 3b bzw. 3a über die Mittelebene 4 hinaus und durch die gegenüberliegende Messerfläche hindurch, so dass sich zwischen benachbarten Vertiefungen 6a, 6b auf den unterschiedlichen Messerflächen 3a, 3b Spitzen 7 ausbilden, die im Wesentlichen in der Mittelebene 4 bzw. der imaginären Scheitelkante 3c liegen, während die Schneidkante 5 zwischen zwei Spitzen 7 zunächst abfällt und dann wieder ansteigt.As can also be seen in connection with FIGS. 2 to 4, the serrated edge 6 contains a multiplicity of indentations 6a, 6b which are machined next to each other and alternately once in one knife surface 3a and then in the other knife surface 3b. The recesses 6a, 6b are substantially identical in their dimensions along the apex edge 3c, the term "substantially" comprising unavoidable manufacturing variations that are unavoidable in such thinly ground materials. The recesses 6a, 6b are immediately adjacent and alternately on opposite blade surfaces 3a, 3b. However, each of the depressions 6a, 6b extends in the direction of the opposite blade surface 3b or 3a beyond the center plane 4 and through the opposite blade surface, so that tips 7 are formed between adjacent depressions 6a, 6b on the different blade surfaces 3a, 3b , which lie substantially in the median plane 4 and the imaginary vertex edge 3c, while the cutting edge 5 between two tips 7 first drops and then rises again.

Die Vertiefung 6a ist in die Messerfläche 3a so eingearbeitet, dass sie auf der gegenüberliegenden Messerfläche 3b in einem Abstand von der Scheitellinie 3c austritt, der im Wesentlichen dem Abstand entspricht, mit dem die in die gegenüberliegende Messerfläche 3b eingearbeitete Vertiefung 6b an der Messerfläche 3a austritt.The recess 6a is formed in the blade surface 3a so as to exit on the opposite blade surface 3b at a distance from the apex line 3c, which in the FIG Substantially corresponds to the distance with which the machined into the opposite blade surface 3b recess 6b on the blade surface 3a exits.

Die Vertiefungen 6a und 6b sind ausgerundet, im dargestellten Ausführungsbeispiel mit einem halbkreisförmigen Schleifwerkzeug, so dass sich eine halbkreisförmige Begrenzungslinie 8 zur jeweiligen Messerfläche ergibt, und sie weisen in Richtung auf die Scheitellinie 3c eine sich vergrößernde Eindringtiefe in die Messerfläche auf.The recesses 6a and 6b are rounded, in the illustrated embodiment with a semicircular grinding tool, so that there is a semicircular boundary line 8 to the respective blade surface, and they have in the direction of the apex line 3c an increasing penetration depth in the blade surface.

Wie Fig. 2 zeigt, ergeben ausgerundete Vertiefungen 6a, 6b eine bogig oder kurvenförmig abfallende und ansteigende Schneidkante 5 mit von Spitzen 7 unterbrochenen, von der Scheitellinie 3c weg gekrümmten Bögen. Da die Vertiefungen 6a, 6b im Wesentlichen identisch und gleichmäßig aneinandergereiht sind, da sich die Vertiefungen 6a, 6b weiterhin jeweils im Wesentlichen um den gleichen Betrag über die Mittelebene 4 erstrecken, so ergibt sich eine im Wesentlichen aus gleich großen, gleich geformten und durch Spitzen 7 voneinander abgetrennten Bögen bestehende Schneidkante 5, wenn diese in Seitenansicht auf eine der Messerflächen 3a, 3b betrachtet wird.As shown in Fig. 2, rounded recesses 6a, 6b provide a curved or curving sloping and rising cutting edge 5 with arcs interrupted by tips 7 and curved away from the apex line 3c. Since the depressions 6a, 6b are arranged substantially identically and uniformly, since the depressions 6a, 6b continue to extend in each case substantially by the same amount over the center plane 4, the result is a substantially equal, identically shaped and by points 7 mutually separated sheets existing cutting edge 5, when viewed in side view of one of the blade surfaces 3a, 3b.

Betrachtet man die sich ergebende Schneidkante 5 in Draufsicht, wie in stark vergrößerter Darstellung in Fig. 4 gezeigt, so ergibt sich ein hin- und hergehender Verlauf der Schneidkante 5 um die Mittelebene 4. Durch die ausgerundete Ausbildung der Vertiefungen 6a, 6b wird auch der Verlauf der Schneidkante 5 kurvenförmig oder bogig, mit Änderungen der Krümmungsrichtung in den Spitzen 7.Considering the resulting cutting edge 5 in plan view, as shown in greatly enlarged view in Fig. 4, the result is a reciprocating course of the cutting edge 5 about the median plane 4. Due to the rounded configuration of the recesses 6a, 6b is also the Course of the cutting edge 5 curved or curved, with changes in the direction of curvature in the tips. 7

In Abwandlung der beschriebenen und gezeichneten Ausführungsbeispiele kann der erfindungsgemäße Wellenschliff nur bereichsweise an der Klinge vorgesehen sein. Die Vertiefungen können andere Formen aufweisen, beispielsweise als trapez- oder V-förmige Kerben ausgebildet sein, was dann zu einem im Wesentlichen zickzackförmigen Verlauf der Schneidkante, sowohl in Draufsicht auf die Schneidkante als auch in Seitenansicht auf die Messerfläche, führt. Die Vertiefungen müssen nicht unbedingt über die gesamte Länge der Klinge und an beiden Messerflächen gleich ausgebildet und gleich beabstandet sein. Es ist weiterhin möglich, zwischen benachbarten, an unterschiedlichen Seiten der Klinge angeordneten Vertiefungen anstelle der Spitzen größere geradlinig verlaufende Bereiche der Schneidkante zu belassen. Die Vertiefungen können ebenfalls mit anderen gleichförmigen oder zusammengesetzten Radien ausgerundet sein, so dass sich statt der gezeichneten kreisbogenförmigen Begrenzungslinie zur jeweiligen Messerfläche, die zu einem kreisbogenförmigen Verlauf der Schneidkante in Draufsicht und Seitenansicht führt, eine als Teil einer Ellipse ausgebildete Begrenzungslinie oder eine Begrenzungslinie mit anderer Form ergibt.In a modification of the described and illustrated embodiments, the serrated edge according to the invention can be provided only partially on the blade. The depressions may have other shapes, for example, be formed as trapezoidal or V-shaped notches, which then leads to a substantially zigzag course of the cutting edge, both in plan view of the cutting edge and in side view of the blade surface. The indentations need not necessarily be formed the same length over the entire length of the blade and on both blade surfaces and be equally spaced. It is also possible to leave between adjacent, arranged on different sides of the blade wells instead of the tips larger rectilinear portions of the cutting edge. The wells can also be rounded with other uniform or composite radii, so that instead of the drawn arcuate boundary line to the respective blade surface, which leads to a circular arc shape of the cutting edge in plan view and side view, results in a part of an ellipse formed boundary line or a boundary line with a different shape.

Claims (10)

  1. Knife (1), in particular household knife, with a cutting region (3) which is provided with a serrated edge (6) and which includes two blade surfaces (3a, 3b) which each extend on one side of a centre plane (4), wherein the serrated edge (6) contains depressions (6a, 6b) which are formed on both sides of the centre plane (4) and alternately in one or the other blade surface (3a, 3b) characterised in that the depressions (6a, 6b) extend from one blade surface (3a, 3b) beyond the centre plane (4) in a direction towards the other blade surface (3b, 3a), in order to form a cutting edge (5) which in a side view of the blade surface (3a, 3b) runs up and down.
  2. Knife according to claim 1, characterised in that the depressions (6a, 6b) are rounded.
  3. Knife according to either of claims 1 or 2, characterised in that the cutting edge (5) in a side view of the blade surface (3a, 3b) undulates.
  4. Knife according to claim 3, characterised in that the depressions (6a, 6b) extend so far beyond the centre plane (4) that in a side view of the blade surface (3a, 3b) a cutting edge (5) with substantially uniformly deep curves is formed.
  5. Knife according to any of claims 1 to 4, characterised in that the cutting edge (5) runs back and forth in a plan view.
  6. Knife according to any of claims 1 to 5, characterised in that the cutting edge (5) runs substantially arcuately in a plan view.
  7. Knife according to any of claims 1 to 6, characterised in that the depression (6a, 6b) in relation to the blade surface (3a, 3b) has a boundary line (8) which lies substantially in an arc.
  8. Knife according to any of claims 1 to 7, characterised in that two depressions (6a, 6b) lying adjacent on different blade surfaces (3a, 3b) end in a point (7) lying substantially on the cutting edge (5) and between the depressions (6a, 6b).
  9. Knife according to any of claims 1 to 8, characterised in that the depressions (6a, 6b) on the two blade surfaces (3a, 3b) are substantially the same size and arranged at substantially equal distances from each other.
  10. Knife according to any of claims 1 to 9, characterised by design thereof as a bread knife (1).
EP03019863A 2003-09-01 2003-09-01 Knife Expired - Lifetime EP1510303B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP03019863A EP1510303B1 (en) 2003-09-01 2003-09-01 Knife
DE50305760T DE50305760D1 (en) 2003-09-01 2003-09-01 knife
ES03019863T ES2275984T3 (en) 2003-09-01 2003-09-01 KNIFE.
AT03019863T ATE345906T1 (en) 2003-09-01 2003-09-01 KNIFE
JP2004112440A JP3759943B2 (en) 2003-09-01 2004-04-06 knife
RU2004113297/02A RU2277468C2 (en) 2003-09-01 2004-04-30 Knife
SG200402995A SG121888A1 (en) 2003-09-01 2004-05-28 Knife

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03019863A EP1510303B1 (en) 2003-09-01 2003-09-01 Knife

Publications (2)

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EP1510303A1 EP1510303A1 (en) 2005-03-02
EP1510303B1 true EP1510303B1 (en) 2006-11-22

Family

ID=34089653

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03019863A Expired - Lifetime EP1510303B1 (en) 2003-09-01 2003-09-01 Knife

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EP (1) EP1510303B1 (en)
JP (1) JP3759943B2 (en)
AT (1) ATE345906T1 (en)
DE (1) DE50305760D1 (en)
ES (1) ES2275984T3 (en)
RU (1) RU2277468C2 (en)
SG (1) SG121888A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2483674A (en) * 2010-09-15 2012-03-21 David Jennings A knife for wiping a surface
JP5924094B2 (en) * 2012-04-18 2016-05-25 新明和工業株式会社 CUTTER, MANUFACTURING METHOD THEREOF, AND PLASMA DEVICE FOR MANUFACTURING THE SAME
JP5914611B2 (en) * 2014-10-06 2016-05-11 アーネスト株式会社 Knife
JP2017079939A (en) * 2015-10-26 2017-05-18 株式会社 富田刃物 Cutlery
SI25693A (en) * 2018-08-24 2020-02-28 PIĹ EK - VITLI KRPAN, d.o.o. Cutting head for bagger or forestry machinery
CN218195311U (en) * 2022-09-26 2023-01-03 武汉苏泊尔炊具有限公司 Cutting tool

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE524324A (en) *
GB247768A (en) * 1925-03-27 1926-02-25 Ernest North Improvements relating to knives for cutting bread, or for other uses
GB322398A (en) * 1929-02-16 1929-12-05 William Grant Improvements in or relating to knife blades
US1911974A (en) * 1931-06-03 1933-05-30 Remington Arms Co Inc Method of producing serrated edges
US2112271A (en) * 1934-12-22 1938-03-29 American Safety Razor Corp Pile wire
US2555735A (en) * 1947-04-19 1951-06-05 Estabrooks Norman Lewis Knife having a serrated edge
GB2113137A (en) * 1981-12-12 1983-08-03 Wilkinson Sword Ltd Knives

Also Published As

Publication number Publication date
RU2277468C2 (en) 2006-06-10
JP3759943B2 (en) 2006-03-29
JP2005074221A (en) 2005-03-24
EP1510303A1 (en) 2005-03-02
SG121888A1 (en) 2006-05-26
ES2275984T3 (en) 2007-06-16
DE50305760D1 (en) 2007-01-04
ATE345906T1 (en) 2006-12-15
RU2004113297A (en) 2005-10-27

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