EP2164580A1 - Multi-string element for a racquet for ball games - Google Patents

Multi-string element for a racquet for ball games

Info

Publication number
EP2164580A1
EP2164580A1 EP08773883A EP08773883A EP2164580A1 EP 2164580 A1 EP2164580 A1 EP 2164580A1 EP 08773883 A EP08773883 A EP 08773883A EP 08773883 A EP08773883 A EP 08773883A EP 2164580 A1 EP2164580 A1 EP 2164580A1
Authority
EP
European Patent Office
Prior art keywords
string
filaments
sections
interconnected
racket
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
EP08773883A
Other languages
German (de)
French (fr)
Other versions
EP2164580B1 (en
Inventor
Rob Cottey
Ralf Schwenger
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.)
Head Technology GmbH
Original Assignee
Head Technology 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
Application filed by Head Technology GmbH filed Critical Head Technology GmbH
Publication of EP2164580A1 publication Critical patent/EP2164580A1/en
Application granted granted Critical
Publication of EP2164580B1 publication Critical patent/EP2164580B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
    • A63B51/02—Strings; String substitutes; Products applied on strings, e.g. for protection against humidity or wear
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
    • A63B51/001—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings using strings made of different materials on the same frame, e.g. gut and nylon
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
    • A63B51/002—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings using strings with different cross-sections on the same frame, e.g. with different thickness
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
    • A63B51/02—Strings; String substitutes; Products applied on strings, e.g. for protection against humidity or wear
    • A63B51/023—Strings having characteristics varying along the length of the string, e.g. diameter or elasticity
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
    • A63B51/10—Reinforcements for stringing

Definitions

  • the present invention relates to a multi-string for a ball game racket, in particular for tennis, squash, badminton, racquetball or Paddletennistrainr, with sections varying structure. Furthermore, the present invention relates to a method for producing such a multi-string.
  • Conventional strings for such clubs are typically made of a variety of natural materials or plastics and may be constructed of multiple layers, such as a core and a shell.
  • DE 200 16 733 U1 discloses a racket string constructed of a toothed core of a first plastic material having a serrated outer surface and a cladding layer of a second plastic material formed over the core to connect to the serrated outer surface is.
  • the first plastic material has hardness and abrasion resistance smaller than that of the second plastic material.
  • the string has a conjugated monofilament structure having one or more core portions surrounded by one or more cladding layers.
  • the string disclosed in DE 38 75 704 T4 has a winding strand structure, ie a string consisting of a core and winding strands which are wound around the core, wherein the core and the strands are mutually adherent secured, both the core and the winding strands are made of a synthetic resin monofilament, and the core and the winding strands have different diameters.
  • either the core or the winding strands are formed of the conjugated monofilament.
  • the string has a structure with twisted strands, ie, the string consists of a plurality of strands of a synthetic resin monofilament, which are twisted together and secured by an adhesive mutually adhesive.
  • strings are known whose cross-section can assume a shape deviating from a circle, as described, for example, in DE 27 37 751 A1 and DE 1 831 958.
  • Ol 864 Ul disclose strings that are designed as a winding construction of several individual elements.
  • the present invention is based on the consideration that it is of interest for the tuning of a ball game racket to combine various properties in a string and to optimally adapt to the respective requirements.
  • the string is constructed differently in sections along its longitudinal direction. This significantly improves the characteristics of the string for a ball game racket.
  • the string is designed as a multi-string, which has at least two filaments which preferably extend substantially parallel to one another, these filaments being connected to each other in sections.
  • a connecting section in which the filaments are connected to each other is followed by a section in which the filaments are not connected to each other, i. in which the filaments run loosely next to each other.
  • the length proportion of the connecting portions to the overall length of the string is preferably between 10% and 80%, more preferably between 25% and 60%, and most preferably between 35% and 50%.
  • the length of a connection section is preferably 20 mm to 200 mm, more preferably 50 mm to 150 mm, and particularly preferably 80 mm to 120 mm.
  • the length of the sections in which the two filaments are unconnected is preferably 50 mm to 250 mm, more preferably 100 mm to 200 mm, and particularly preferably 130 mm to 170 mm.
  • the individual filaments consist of conventional racket strings. In another embodiment of the present invention, the filaments consist of parts of conventional sports racquet strings.
  • a multiple string of the present invention may have two or more filaments of the same or different type. In the context of the invention it is preferred to combine several filaments which differ in their cross-sectional shape, their dimensions (for example diameter), their material and / or their nature.
  • the filaments may be ordinary multifilament and / or single filament strings.
  • the diameter of the respective filaments can be chosen variably, but is preferably in the range between 0.5 mm and 1 mm and particularly preferably in a range between 0.65 mm and 0.8 mm.
  • the present invention relates to a method for producing such a multi-string.
  • a racket string produced in a substantially conventional manner, which serves as a filament for the string according to the invention, is provided with a coating which forms a later section-wise connection of the string
  • a mechanism that allows two or more filaments in sections permanently connected together preferably uses high temperatures, UV light or laser light to bond the filaments together by means of the coating. In this case, this mechanism can be used in such a targeted manner, ie, limited in space, that a connection takes place only in the connection sections.
  • the portions where the filaments are not bonded together are prepared from a conventional racket string by cutting the string lengthwise in sections.
  • Fig. 1 is a schematic side view of an embodiment of the erf ⁇ ndungshielen string with an enlarged detail, in the
  • FIG. 2 is a schematic side view of another embodiment of the multiple string according to the invention
  • 3a-3f are schematic cross-sectional profiles of various embodiments of multiple strings according to the invention, respectively in the unconnected and the connected sections
  • Fig. 4 is a schematic representation of a erf ⁇ ndungshielen
  • Fig. 5 is a diagram showing the recovery coefficient of a racket, which is once covered with a conventional and once with a string according to the invention.
  • FIG. 1 shows an embodiment of a string 1 according to the invention and an enlarged detail thereof. Therein visible are a first filament 3 and a second filament 5 and connecting sections 7, in which the two filaments 3, 5 are connected to each other. Between two adjacent connecting portions 7, a portion 9 is arranged in each case, in which the two filaments 3, 5 are not connected to each other.
  • the connecting portions 7 are designed so that the material 11, the two Filaments 3, 5 connects to each other, not only located between them, but the two filaments 3, 5 wrapped.
  • FIG. 2 shows a further preferred embodiment of a string 1 according to the invention in the form of a double string.
  • This double string 1 also has two filaments 3, 5,
  • the two filaments 3, 5 are connected to each other in such a way that the connecting material 11 is located substantially only between the two.
  • FIG. 3 shows various cross-sectional profiles of several embodiments of multiple strings according to the invention, in each case in an unconnected section 9 (FIGS. 3a, 3c and 3e) and for a connecting section 7 (FIGS. 3b, 3d and 3f).
  • Fig. 3a shows the cross-sectional profile of a double string 1 according to the invention, in a section 9 in which the two filaments are not connected to each other.
  • the two filaments 3, 5 have in this embodiment of the double string 1 substantially the same cross-sectional shapes and the same diameter.
  • Fig. 3b shows the cross-sectional profile of the same double string 1, but in the connecting portion 7, in which the two filaments 3, 5 are interconnected.
  • FIG. 3 c shows a further embodiment of a double string 1 according to the invention, again in cross-sectional profile, in which case the first filament 3 has a larger diameter than the second filament 5.
  • the double string 1 according to FIG. 3 c is shown in a connecting section 7 in which the two filaments 3, 5 are interconnected.
  • 3e shows the cross-sectional profile of a further embodiment of the string 1 according to the invention, here in the form of a triple string, again showing a section 9 in which the three filaments are not connected to one another.
  • the first and second filaments 3, 5 have the same diameter, whereas a third filament 13 has a smaller diameter.
  • 3f shows the triple string 1 according to FIG. 3e in a connecting section 7, in which the three filaments 3, 5, 13 are connected to one another.
  • the individual filaments 3, 5, 13 in the unconnected sections 9 run essentially parallel to one another without being connected or coupled to one another.
  • the filaments can also be wound helically or helically around each other. It can be seen from the cross sections according to FIGS. 3b, 3d and 3f that the individual filaments 3, 5, 13 in the connecting sections 7 are firmly coupled together or are integrally joined together.
  • the length of the connecting portions 7 on the total length of the string 1 is preferably between 10% and 80%, more preferably between 25% and 60% and particularly preferably between 35% and 50%.
  • the length of a connecting portion 7 is preferably 20 mm to 200 mm, more preferably 50 mm to 150 mm, and particularly preferably 80 mm to 120 mm.
  • the length of the sections 9 in which the filaments 3, 5, 13 are unconnected is preferably 50 mm to 250 mm, more preferably 100 mm to 200 mm and particularly preferably 130 mm to 170 mm.
  • a manufacturing method for producing an embodiment of the string 1 according to the invention in the form of a double string is shown schematically.
  • the production runs from right to left as shown. Starting from the right, two filaments 3, 5 are visible, which are each coated by a coating device 15, 17 assigned to these filaments. Alternatively, the coating with a common coating device is possible.
  • the individual filaments 3, 5 are conveyed via a guide mechanism 19, e.g. in the form of pulleys, merged.
  • Guide mechanism 19 is able, depending on the string configuration, the two or more filaments 3, 5 merge, for example, to a parallel course. Furthermore, the filaments 3, 5 can be twisted, intertwined, or otherwise arranged by the guide mechanism 19 so as to extend parallel to one another.
  • connection mechanism 21 preferably uses high temperatures, UV light or laser light to bond the filaments 3, 5 together by means of the coating.
  • the mechanism 21 can be targeted, i. local limited, use that a connection is made only in the connecting sections 7.
  • the finished double string 1 for example, can be wound into a roll.
  • Fig. 5 shows the result of a measurement in which the recovery coefficient was determined by a ball game racket. A ball is shot at a certain speed on the fixed racket and measured the speed of the rebounding ball. This measurement was carried out at different points of the racket, which was once covered with a conventional string and once with a string according to the invention.
  • the dashed curve shows the recovery coefficient of the racket for various positions on the racket head in the case of a string of the present invention, whereas the solid line represents the same measurement in the case of a conventional racket string. It turns out that with the string according to the invention a significantly improved recovery coefficient is ensured, resulting in higher kickback forces.
  • the multiple strings according to the invention have in the sections 7, in which the filaments 3, 5, 13 are joined together, the properties and appearance a conventional racket string, whereas the properties and the appearance of the multifilament in the areas 9, in which the filaments 3, 5, 13 are not connected to each other, the properties and appearance of a bundle of two or more parallel individual strings.
  • the characteristics of the multiple string of the present invention are defined by the combination of the characteristics of the different portions.
  • the properties of the multiple string can be varied by, for example, varying the ratio of the lengths of the bonded and unconnected filament sections.

Abstract

The present invention relates to a string for a ball racquet, the string having at least two filaments which run parallel to each other, wherein the filaments are connected to each other only in some sections. Furthermore, the invention relates to a method for producing a string of this type. A first method has the steps of providing at least two string filaments, bringing together the string filaments to form a configuration running in parallel and connecting the string filaments in some sections. An alternative production method has the steps of providing a string and slitting the string in some sections in order to produce at least two string filaments which run parallel to each other and are connected to each other only in some sections.

Description

Mehrfachsaite für einen Ballspielschläger Multiple string for a ball game racket
Die vorliegende Erfindung bezieht sich auf eine Mehrfachsaite für einen Ballspielschläger, insbesondere für Tennis-, Squash-, Badminton-, Racketball oder Paddletennisschläger, mit abschnittsweise variierender Struktur. Ferner betrifft die vorliegende Erfindung ein Verfahren zur Herstellung einer solchen Mehrfachsaite.The present invention relates to a multi-string for a ball game racket, in particular for tennis, squash, badminton, racquetball or Paddletennisschläger, with sections varying structure. Furthermore, the present invention relates to a method for producing such a multi-string.
Konventionelle Saiten für derartige Schläger werden typischerweise aus unterschiedlichen Naturmaterialien oder Kunststoffen hergestellt und können aus mehreren Schichten, etwa einem Kern und einer Hülle, aufgebaut sein. So offenbart beispielsweise die DE 200 16 733 Ul eine Schlägersaite, die aus einem gezahnten Kern aus einem ersten Plastikmaterial mit einer gezahnten Außenoberfläche und einer Hüllschicht aus einem zweiten Plastikmaterial aufgebaut ist, die über den Kern derart aufgeformt ist, dass sie mit der gezahnten Außenoberfläche verbunden ist. Das erste Plastikmaterial hat eine Härte und Abriebfestigkeit, die kleiner sind als die des zweiten Plastikmaterials.Conventional strings for such clubs are typically made of a variety of natural materials or plastics and may be constructed of multiple layers, such as a core and a shell. For example, DE 200 16 733 U1 discloses a racket string constructed of a toothed core of a first plastic material having a serrated outer surface and a cladding layer of a second plastic material formed over the core to connect to the serrated outer surface is. The first plastic material has hardness and abrasion resistance smaller than that of the second plastic material.
Außerdem sind aus der DE 38 75 704 T4 Schlägersaiten mit einem Kern-Hülle- Aufbau bekannt. Gemäß einer Ausführungsform weist die Saite eine konjugierte Monofilament- Struktur mit einem oder mehreren Kernteilen auf, die von einer oder mehreren Hüllschichten umgeben sind. Gemäß einer weiteren Ausführungsform hat die in der DE 38 75 704 T4 offenbarte Saite eine Wickellitzen-Struktur, d.h. eine Saite, die aus einem Kern und Wickellitzen besteht, die um den Kern herumgewickelt sind, wobei der Kern und die Litzen wechselseitig haftend gesichert sind, sowohl der Kern als auch die Wickellitzen aus einem Kunstharz-Monofilament bestehen, und der Kern und die Wickellitzen unterschiedlichen Durchmesser haben. Bei dieser Ausführungsform sind entweder der Kern oder die Wickellitzen aus dem konjugierten Monofilament gebildet. Gemäß einer anderen Ausführungsform hat die Saite eine Struktur mit gezwirnten Litzen, d.h. die Saite besteht aus einer Vielzahl von Litzen aus einem Kunstharz- Monofilament, welche zusammengezwirnt und mittels eines Haftmittels wechselseitig haftend gesichert sind. Weiterhin sind im Stand der Technik Saiten bekannt, deren Querschnitt eine von einem Kreis abweichende Form annehmen kann, wie z.B. in der DE 27 37 751 Al und DE 1 831 958 beschrieben. Die DE 851 450 C und DE 85 Ol 864 Ul offenbaren Saiten, die als Wickelkonstruktion mehrerer Einzelelemente ausgebildet sind.In addition, from DE 38 75 704 T4 rackets with a core-shell structure known. According to one embodiment, the string has a conjugated monofilament structure having one or more core portions surrounded by one or more cladding layers. According to a further embodiment, the string disclosed in DE 38 75 704 T4 has a winding strand structure, ie a string consisting of a core and winding strands which are wound around the core, wherein the core and the strands are mutually adherent secured, both the core and the winding strands are made of a synthetic resin monofilament, and the core and the winding strands have different diameters. In this embodiment, either the core or the winding strands are formed of the conjugated monofilament. According to another embodiment, the string has a structure with twisted strands, ie, the string consists of a plurality of strands of a synthetic resin monofilament, which are twisted together and secured by an adhesive mutually adhesive. Furthermore, in the prior art, strings are known whose cross-section can assume a shape deviating from a circle, as described, for example, in DE 27 37 751 A1 and DE 1 831 958. DE 851 450 C and DE 85 Ol 864 Ul disclose strings that are designed as a winding construction of several individual elements.
Diese bereits bekannten Arten von Saitenkonstruktionen haben gemeinsam, dass deren Form, Struktur und Zusammensetzung entlang der Saite im wesentlichen konstant ist.These already known types of string designs have in common that their shape, structure and composition along the string is substantially constant.
Es ist eine Aufgabe der vorliegenden Erfindung, eine Saite für einen Ballspielschläger zur Verfügung zu stellen, die verbesserte Eigenschaften aufweist, insbesondere eine bessere Kraftübertragung vom Schläger auf den Ball sowie ein besseres Handling ermöglicht. Diese Aufgabe wird durch die Merkmale der Patentansprüche gelöst.It is an object of the present invention to provide a string for a ball game racket which has improved characteristics, in particular allows better power transmission from the racket to the ball and better handling. This object is solved by the features of the claims.
Die vorliegende Erfindung beruht dabei auf der Überlegung, dass es für das Tuning eines Ballspielschlägers von Interesse ist, verschiedene Eigenschaften in einer Saite zu kombinieren und an die jeweiligen Anforderungen optimal anzupassen. Hierzu ist erfindungsgemäß die Saite entlang ihrer Längsrichtung abschnittsweise unterschiedlich aufgebaut. Damit lassen sich die Eigenschaften der Saite für einen Ballspielschläger wesentlich verbessern.The present invention is based on the consideration that it is of interest for the tuning of a ball game racket to combine various properties in a string and to optimally adapt to the respective requirements. For this purpose, according to the invention, the string is constructed differently in sections along its longitudinal direction. This significantly improves the characteristics of the string for a ball game racket.
Erfindungsgemäß ist die Saite als Mehrfachsaite ausgebildet, die mindestens zwei vorzugsweise im wesentlichen parallel zueinander verlaufende Filamente aufweist, wobei diese Filamente abschnittsweise miteinander verbunden sind. Dabei folgt jeweils auf einen Verbindungsabschnitt, in dem die Filamente miteinander verbunden sind, ein Abschnitt, in dem die Filamente nicht miteinander verbunden sind, d.h. in dem die Filamente lose nebeneinander verlaufen.According to the invention, the string is designed as a multi-string, which has at least two filaments which preferably extend substantially parallel to one another, these filaments being connected to each other in sections. In this case, a connecting section in which the filaments are connected to each other is followed by a section in which the filaments are not connected to each other, i. in which the filaments run loosely next to each other.
Der Längenanteil der Verbindungsabschnitte an der Gesamtlänge der Saite liegt vorzugsweise zwischen 10 % und 80 %, stärker bevorzugt zwischen 25 % und 60 % und besonders bevorzugt zwischen 35 % und 50 %. Die Länge eines Verbindungsabschnitts beträgt vorzugsweise 20 mm bis 200 mm, stärker bevorzugt 50 mm bis 150 mm und besonders bevorzugt 80 mm bis 120 mm. Die Länge der Abschnitte, in denen die beiden Filamente unverbunden verlaufen, beträgt vorzugsweise 50 mm bis 250 mm, stärker bevorzugt 100 mm bis 200 mm und besonders bevorzugt 130 mm bis 170 mm.The length proportion of the connecting portions to the overall length of the string is preferably between 10% and 80%, more preferably between 25% and 60%, and most preferably between 35% and 50%. The length of a connection section is preferably 20 mm to 200 mm, more preferably 50 mm to 150 mm, and particularly preferably 80 mm to 120 mm. The length of the sections in which the two filaments are unconnected is preferably 50 mm to 250 mm, more preferably 100 mm to 200 mm, and particularly preferably 130 mm to 170 mm.
In einer Ausführungsform der vorliegenden Erfindung bestehen die einzelnen Filamente aus herkömmlichen Schlägersaiten. In einer anderen Ausführung der vorliegenden Erfindung bestehen die Filamente aus Teilen von herkömmlichen Saiten für Sportschläger. Eine Mehrfachsaite der vorliegenden Erfindung kann zwei oder mehr Filamente gleichen oder unterschiedlichen Typs aufweisen. Im Rahmen der Erfindung ist es bevorzugt, mehrere Filamente zu kombinieren, die sich in ihrer Querschnittsform, ihren Abmessungen (z.B. Durchmesser), ihrem Material und/oder in ihrer Beschaffenheit unterscheiden. Insbesondere kann es sich bei den Filamenten um gewöhnliche Multifilament- und/oder Einfachfilamentsaiten handeln. Der Durchmesser der jeweiligen Filamente kann variabel gewählt werden, liegt aber vorzugsweise im Bereich zwischen 0,5 mm und 1 mm und besonders bevorzugt in einem Bereich zwischen 0,65 mm und 0,8 mm.In one embodiment of the present invention, the individual filaments consist of conventional racket strings. In another embodiment of the present invention, the filaments consist of parts of conventional sports racquet strings. A multiple string of the present invention may have two or more filaments of the same or different type. In the context of the invention it is preferred to combine several filaments which differ in their cross-sectional shape, their dimensions (for example diameter), their material and / or their nature. In particular, the filaments may be ordinary multifilament and / or single filament strings. The diameter of the respective filaments can be chosen variably, but is preferably in the range between 0.5 mm and 1 mm and particularly preferably in a range between 0.65 mm and 0.8 mm.
Ferner betrifft die vorliegende Erfindung ein Verfahren zur Herstellung einer solchen Mehrfachsaite. Dabei wird eine auf im Wesentlichen herkömmliche Art und Weise produzierte Schlägersaite, die als Filament für die erfindungsgemäße Saite dient, mit einer Beschichtung versehen, die eine spätere abschnittsweise Verbindung derFurthermore, the present invention relates to a method for producing such a multi-string. In this case, a racket string produced in a substantially conventional manner, which serves as a filament for the string according to the invention, is provided with a coating which forms a later section-wise connection of the string
Filamente zulässt. Die zwei oder mehr so beschichteten Filamente durchlaufen derAllows filaments. The two or more such coated filaments go through the
Länge nach, parallel zueinander verlaufend (d.h. in im Wesentlichen gleicher Längsrichtung), einen Mechanismus, der es erlaubt, zwei oder mehr Filamente abschnittsweise dauerhaft miteinander zu verbinden. Dieser Mechanismus verwendet vorzugsweise hohe Temperaturen, UV-Licht oder Laserlicht, um die Filamente mittels der Beschichtung aneinander zu binden. Dabei lässt sich dieser Mechanismus derart gezielt, d.h. örtlich beschränkt, einsetzen, dass eine Verbindung nur in den Verbindungsabschnitten erfolgt. Bei einem weiteren Verfahren zur Herstellung einer Mehrfachsaite nach der vorliegenden Erfindung werden die Abschnitte, in denen die Filamente nicht miteinander verbunden sind, ausgehend von einer herkömmlichen Schlägersaite hergestellt, indem die Saite der Länge nach abschnittsweise durchtrennt wird.Lengthwise, parallel to each other (ie, in substantially the same longitudinal direction), a mechanism that allows two or more filaments in sections permanently connected together. This mechanism preferably uses high temperatures, UV light or laser light to bond the filaments together by means of the coating. In this case, this mechanism can be used in such a targeted manner, ie, limited in space, that a connection takes place only in the connection sections. In another method of manufacturing a multi-string according to the present invention, the portions where the filaments are not bonded together are prepared from a conventional racket string by cutting the string lengthwise in sections.
Nachfolgend werden bevorzugte Ausführungsformen der erfindungsgemäßen Saite anhand der Figuren beispielhaft beschrieben. Es zeigen:Hereinafter, preferred embodiments of the string according to the invention are described by way of example with reference to FIGS. Show it:
Fig. 1 eine schematische Seitenansicht einer Ausführungsform der erfϊndungsgemäßen Saite mit einem vergrößerten Ausschnitt, in demFig. 1 is a schematic side view of an embodiment of the erfϊndungsgemäßen string with an enlarged detail, in the
Abschnitte unverbundener und Abschnitte verbundener Filamente sichtbar sind; Fig. 2 eine schematische Seitenansicht einer anderen Ausführung der erfindungsgemäßen Mehrfachsaite; Fig. 3a-3f schematische Querschnittsprofile verschiedener Ausführungsformen von erfindungsgemäßen Mehrfachsaiten, jeweils in den unverbundenen und den verbundenen Abschnitten; Fig. 4 eine schematische Darstellung eines erfϊndungsgemäßenSections of unconnected and sections of connected filaments are visible; Fig. 2 is a schematic side view of another embodiment of the multiple string according to the invention; 3a-3f are schematic cross-sectional profiles of various embodiments of multiple strings according to the invention, respectively in the unconnected and the connected sections; Fig. 4 is a schematic representation of a erfϊndungsgemäßen
Herstellungsverfahrens für die Mehrfachsaite der vorliegenden Erfindung; undManufacturing method for the multi-string of the present invention; and
Fig. 5 ein Diagramm, in dem der Rückgewinnungskoeffizient eines Schlägers dargestellt ist, der einmal mit einer herkömmlichen und einmal mit einer erfindungsgemäßen Saite bespannt ist.Fig. 5 is a diagram showing the recovery coefficient of a racket, which is once covered with a conventional and once with a string according to the invention.
Figur 1 zeigt eine Ausführungsform einer erfindungsgemäßen Saite 1 und einen vergrößerten Ausschnitt davon. Darin sichtbar sind eine erstes Filament 3 und ein zweites Filament 5 sowie Verbindungsabschnitte 7, in denen die beiden Filamente 3, 5 miteinander verbunden sind. Zwischen zwei benachbarten Verbindungsabschnitten 7 ist jeweils ein Abschnitt 9 angeordnet, in dem die beiden Filamente 3, 5 nicht miteinander verbunden sind. Bei dieser Ausführungsform der Mehrfachsaite sind die Verbindungsabschnitte 7 so ausgeführt, dass sich das Material 11, das die beiden Filamente 3, 5 miteinander verbindet, nicht nur zwischen diesen befindet, sondern die beiden Filamente 3, 5 umhüllt.FIG. 1 shows an embodiment of a string 1 according to the invention and an enlarged detail thereof. Therein visible are a first filament 3 and a second filament 5 and connecting sections 7, in which the two filaments 3, 5 are connected to each other. Between two adjacent connecting portions 7, a portion 9 is arranged in each case, in which the two filaments 3, 5 are not connected to each other. In this embodiment of the multi-string, the connecting portions 7 are designed so that the material 11, the two Filaments 3, 5 connects to each other, not only located between them, but the two filaments 3, 5 wrapped.
Figur 2 zeigt eine weitere bevorzugte Ausführungsform einer erfindungsgemäßen Saite 1 in Form einer Doppelsaite. Auch diese Doppelsaite 1 weist zwei Filamente 3, 5,FIG. 2 shows a further preferred embodiment of a string 1 according to the invention in the form of a double string. This double string 1 also has two filaments 3, 5,
Verbindungsabschnitte 7, in denen die beiden Filamente 3, 5 miteinander verbunden sind, und einen dazwischen liegenden Bereich 9 auf, in dem die beiden Filamente 3, 5 nicht miteinander verbunden sind. Bei dieser Ausführungsform der Doppelsaite 1 sind die beiden Filamente 3, 5 derart miteinander verbunden, dass sich das verbindende Material 11 im wesentlichen nur zwischen diesen beiden befindet.Connecting portions 7, in which the two filaments 3, 5 are interconnected, and an intermediate region 9, in which the two filaments 3, 5 are not interconnected. In this embodiment of the double string 1, the two filaments 3, 5 are connected to each other in such a way that the connecting material 11 is located substantially only between the two.
Figur 3 zeigt verschiedene Querschnittsprofile mehrerer Ausführungsformen von erfindungsgemäßen Mehrfachsaiten, und zwar jeweils in einem unverbundenen Abschnitt 9 (Fig. 3a, 3c und 3e) und für einen Verbindungsabschnitt 7 (Fig. 3b, 3d und 3f). Fig. 3a zeigt das Querschnittsprofil einer erfindungsgemäßen Doppelsaite 1, und zwar in einem Abschnitt 9, in dem die beiden Filamente nicht miteinander verbunden sind. Die beiden Filamente 3, 5 weisen in dieser Ausführungsform der Doppelsaite 1 im wesentlichen gleiche Querschnittsformen und den gleichen Durchmessers auf. Fig. 3b zeigt das Querschnittsprofil derselben Doppelsaite 1, jedoch im Verbindungsabschnitt 7, in dem die beiden Filamente 3, 5 miteinander verbunden sind.FIG. 3 shows various cross-sectional profiles of several embodiments of multiple strings according to the invention, in each case in an unconnected section 9 (FIGS. 3a, 3c and 3e) and for a connecting section 7 (FIGS. 3b, 3d and 3f). Fig. 3a shows the cross-sectional profile of a double string 1 according to the invention, in a section 9 in which the two filaments are not connected to each other. The two filaments 3, 5 have in this embodiment of the double string 1 substantially the same cross-sectional shapes and the same diameter. Fig. 3b shows the cross-sectional profile of the same double string 1, but in the connecting portion 7, in which the two filaments 3, 5 are interconnected.
Fig. 3c zeigt eine weitere Ausführungsform einer erfindungsgemäßen Doppelsaite 1, wiederum im Querschnittsprofil, wobei hier das erste Filament 3 einen größeren Durchmesser hat als das zweite Filament 5. In Fig. 3d ist die Doppelsaite 1 gemäß Fig. 3 c in einem Verbindungsabschnitt 7 dargestellt, in dem die beiden Filamente 3, 5 miteinander verbunden sind.3 c shows a further embodiment of a double string 1 according to the invention, again in cross-sectional profile, in which case the first filament 3 has a larger diameter than the second filament 5. In FIG. 3d the double string 1 according to FIG. 3 c is shown in a connecting section 7 in which the two filaments 3, 5 are interconnected.
Fig. 3e zeigt das Querschnittsprofil einer weiteren Ausführungsform der erfindungsgemäßen Saite 1 , hier in Form einer Tripelsaite, wobei wieder ein Abschnitt 9 dargestellt ist, in dem die drei Filamente nicht miteinander verbunden sind. In dieser3e shows the cross-sectional profile of a further embodiment of the string 1 according to the invention, here in the form of a triple string, again showing a section 9 in which the three filaments are not connected to one another. In this
Ausführungsform haben das erste und zweite Filament 3, 5 den gleichen Durchmesser, wohingegen ein drittes Filament 13 einen kleineren Durchmesser hat. Fig. 3f zeigt die Tripelsaite 1 gemäß Fig. 3e in einem Verbindungsabschnitt 7, in dem die drei Filamente 3, 5, 13 miteinander verbunden sind.Embodiment, the first and second filaments 3, 5 have the same diameter, whereas a third filament 13 has a smaller diameter. 3f shows the triple string 1 according to FIG. 3e in a connecting section 7, in which the three filaments 3, 5, 13 are connected to one another.
Wie aus den Figuren 3 a, 3 c und 3e ersichtlich ist, verlaufen die einzelnen Filamente 3, 5, 13 in den nicht verbundenen Abschnitten 9 im wesentlichen parallel zueinander, ohne miteinander verbunden oder gekoppelt zu sein. Dabei können die Filamente auch spiralförmig bzw. helikal umeinander geschlungen sein. Aus den Querschnitten gemäß den Figuren 3b, 3d und 3f ist ersichtlich, dass die einzelnen Filamente 3, 5, 13 in den Verbindungsabschnitten 7 fest miteinander gekoppelt sind bzw. integral zusammengefügt sind.As can be seen from FIGS. 3 a, 3 c and 3 e, the individual filaments 3, 5, 13 in the unconnected sections 9 run essentially parallel to one another without being connected or coupled to one another. In this case, the filaments can also be wound helically or helically around each other. It can be seen from the cross sections according to FIGS. 3b, 3d and 3f that the individual filaments 3, 5, 13 in the connecting sections 7 are firmly coupled together or are integrally joined together.
Der Längenanteil der Verbindungsabschnitte 7 an der Gesamtlänge der Saite 1 liegt hierbei vorzugsweise zwischen 10 % und 80 %, stärker bevorzugt zwischen 25 % und 60 % und besonders bevorzugt zwischen 35 % und 50 %. Die Länge eines Verbindungsabschnitts 7 beträgt vorzugsweise 20 mm bis 200 mm, stärker bevorzugt 50 mm bis 150 mm und besonders bevorzugt 80 mm bis 120 mm. Die Länge der Abschnitte 9, in denen die Filamente 3, 5, 13 unverbunden verlaufen, beträgt vorzugsweise 50 mm bis 250 mm, stärker bevorzugt 100 mm bis 200 mm und besonders bevorzugt 130 mm bis 170 mm.The length of the connecting portions 7 on the total length of the string 1 is preferably between 10% and 80%, more preferably between 25% and 60% and particularly preferably between 35% and 50%. The length of a connecting portion 7 is preferably 20 mm to 200 mm, more preferably 50 mm to 150 mm, and particularly preferably 80 mm to 120 mm. The length of the sections 9 in which the filaments 3, 5, 13 are unconnected is preferably 50 mm to 250 mm, more preferably 100 mm to 200 mm and particularly preferably 130 mm to 170 mm.
In Fig. 4 ist ein Herstellungsverfahren zur Herstellung einer Ausführung der erfindungsgemäßen Saite 1 in Form einer Doppelsaite schematisch dargestellt. Die Herstellung läuft gemäß dieser Darstellung von rechts nach links ab. Von rechts einlaufend sind zwei Filamente 3, 5 zu sehen, die jeweils durch eine diesen Filamenten zugeordnete Beschichtungseinrichtung 15, 17 beschichtet werden. Alternativ dazu ist auch die Beschichtung mit einer gemeinsamen Beschichtungseinrichtung möglich.4, a manufacturing method for producing an embodiment of the string 1 according to the invention in the form of a double string is shown schematically. The production runs from right to left as shown. Starting from the right, two filaments 3, 5 are visible, which are each coated by a coating device 15, 17 assigned to these filaments. Alternatively, the coating with a common coating device is possible.
Im Anschluss an die Beschichtung werden die einzelnen Filamente 3, 5 über einen Führungsmechanismus 19, z.B. in Form von Umlenkrollen, zusammengeführt. DerFollowing the coating, the individual filaments 3, 5 are conveyed via a guide mechanism 19, e.g. in the form of pulleys, merged. Of the
Führungsmechanismus 19 ist in der Lage, je nach Saitenkonfiguration, die zwei oder mehr Filamente 3, 5 beispielsweise zu einem parallelen Verlauf zusammenzuführen. Femer können die Filamente 3, 5 durch den Führungsmechanismus 19 miteinander verdrillt, verflochten, oder in sonstiger Weise angeordnet werden, dass sie sich parallel zueinander erstrecken.Guide mechanism 19 is able, depending on the string configuration, the two or more filaments 3, 5 merge, for example, to a parallel course. Furthermore, the filaments 3, 5 can be twisted, intertwined, or otherwise arranged by the guide mechanism 19 so as to extend parallel to one another.
Anschließend durchlaufen die beiden nun parallel zueinander verlaufenden Filamente 3, 5 einen Verbindungsmechanismus 21, in dem die zuvor beschichteten Filamente 3, 5 abschnittsweise dauerhaft miteinander verbunden werden. Dieser Verbindungsmechanismus 21 verwendet vorzugsweise hohe Temperaturen, UV-Licht oder Laserlicht, um die Filamente 3, 5 mittels der Beschichtung aneinander zu binden. Dabei lässt sich der Mechanismus 21 derart gezielt, d.h. örtlich beschränkt, einsetzen, dass eine Verbindung nur in den Verbindungsabschnitten 7 erfolgt.Subsequently, the two mutually parallel filaments 3, 5 pass through a connecting mechanism 21, in which the previously coated filaments 3, 5 are permanently connected in sections. This connection mechanism 21 preferably uses high temperatures, UV light or laser light to bond the filaments 3, 5 together by means of the coating. In this case, the mechanism 21 can be targeted, i. local limited, use that a connection is made only in the connecting sections 7.
Abschließend kann die fertiggestellte Doppelsaite 1 beispielsweise zu einer Rolle aufgewickelt werden.Finally, the finished double string 1, for example, can be wound into a roll.
Fig. 5 zeigt das Ergebnis einer Messung, bei der der Rückgewinnungskoeffizient von einem Ballspielschläger bestimmt wurde. Dabei wird ein Ball mit einer bestimmten Geschwindigkeit auf den fixierten Schläger geschossen und die Geschwindigkeit des abprallenden Balles gemessen. Diese Messung wurde an verschiedenen Stellen des Schlägers durchgeführt , der einmal mit einer herkömmlichen Saite und einmal mit einer erfindungsgemäßen Saite bespannt war. Die gestrichelte Kurve zeigt den Rückgewinnungskoeffizienten des Schlägers für verschiedene Positionen am Schlägerkopf im Falle einer Saite der vorliegenden Erfindung, wohingegen die durchgezogene Linie dieselbe Messung im Falle einer herkömmlichen Schlägersaite darstellt. Dabei zeigt sich, dass mit der erfindungsgemäßen Saite ein deutlich verbesserter Rückgewinnungskoeffizient gewährleistet ist, was in höheren Rückschlagkräften resultiert.Fig. 5 shows the result of a measurement in which the recovery coefficient was determined by a ball game racket. A ball is shot at a certain speed on the fixed racket and measured the speed of the rebounding ball. This measurement was carried out at different points of the racket, which was once covered with a conventional string and once with a string according to the invention. The dashed curve shows the recovery coefficient of the racket for various positions on the racket head in the case of a string of the present invention, whereas the solid line represents the same measurement in the case of a conventional racket string. It turns out that with the string according to the invention a significantly improved recovery coefficient is ensured, resulting in higher kickback forces.
Die erfindungsgemäßen Mehrfachsaiten haben in den Abschnitten 7, in denen die Filamente 3, 5, 13 miteinander verbunden sind, die Eigenschaften und das Aussehen einer herkömmlichen Schlägersaite, wohingegen die Eigenschaften und das Aussehen der Mehrfachsaite in den Bereichen 9, in denen die Filamente 3, 5, 13 nicht miteinander verbunden sind, denjenigen Eigenschaften und dem Aussehen eines Bündels zweier oder mehrerer parallel zueinander verlaufender Einzelsaiten gleichen. Demzufolge sind die Eigenschaften der Mehrfachsaite der vorliegenden Erfindung durch die Kombination der Eigenschaften der unterschiedlichen Teilabschnitte definiert. Somit lassen sich also die Eigenschaften der Mehrfachsaite dadurch variieren, dass beispielsweise das Verhältnis der Längen der Abschnitte mit verbundenen und unverbundenen Filamenten variiert wird. Es ist aber beispielsweise auch möglich, einen Ballspielschläger mit einer Mehrfachsaite der vorliegenden Erfindung so zu bespannen, dass auf bestimmten Bereichen des Schlägerkopfes nur Saitenabschnitte vorhanden sind, in denen die Filamente miteinander verbunden sind, und in anderen Bereichen des Schlägerkopfes nur Saitenabschnitte vorhanden sind, in denen die Filamente nicht miteinander verbunden sind. Dadurch lassen sich gezielt Bereiche des Schlägerkopfes bereitstellen, in denen unterschiedliche gewünschte Eigenschaften vorhanden sind. So zeigt beispielsweise ein Tennisschläger, der mit einer Ausfuhrungsform der Mehrfachsaite bespannt ist, eine deutlich verbesserte Kraftübertragung auf den Ball im Zentrum des Saitenbettes im Vergleich zu einem mit einer konventionellen Saite bespannten Schläger. The multiple strings according to the invention have in the sections 7, in which the filaments 3, 5, 13 are joined together, the properties and appearance a conventional racket string, whereas the properties and the appearance of the multifilament in the areas 9, in which the filaments 3, 5, 13 are not connected to each other, the properties and appearance of a bundle of two or more parallel individual strings. As a result, the characteristics of the multiple string of the present invention are defined by the combination of the characteristics of the different portions. Thus, the properties of the multiple string can be varied by, for example, varying the ratio of the lengths of the bonded and unconnected filament sections. But it is also possible, for example, to string a ball game racket with a multiple string of the present invention so that only portions of strings are present on certain areas of the racket head, in which the filaments are connected to each other, and in other areas of the club head only string sections are present in where the filaments are not connected. As a result, areas of the club head can be selectively provided in which different desired properties are present. For example, shows a tennis racket, which is covered with an embodiment of the multi-string, a significantly improved power transmission to the ball in the center of the string bed compared to a covered with a conventional string racquets.

Claims

PATENTANSPRÜCHE
1. Saite für einen Ballschläger, die mindestens zwei parallel zueinander verlaufende Filamente (3, 5, 13) aufweist, wobei die Filamente lediglich abschnittsweise miteinander verbunden sind.1. string for a ball racquet, which has at least two mutually parallel filaments (3, 5, 13), wherein the filaments are only partially connected to each other.
2. Saite nach Anspruch 1, wobei die Filamente (3, 5, 13) gleichen Typs sind.2. String according to claim 1, wherein the filaments (3, 5, 13) are of the same type.
3. Saite nach Anspruch 1 oder 2, wobei die Filamente (3, 5, 13) sich im Durchmesser und/oder in der Beschaffenheit unterscheiden.3. string according to claim 1 or 2, wherein the filaments (3, 5, 13) differ in diameter and / or in nature.
4. Saite nach einem der Ansprüche 1 bis 3, wobei Abschnitte (7) miteinander verbundener Filamente (3, 5, 13) und Abschnitte (9) nicht miteinander verbundener Filamente (3, 5, 13) aufeinander folgen, wobei der Längenanteil miteinander verbundener Filamente an der Gesamtlänge der Saite zwischen 10 % und 80 %, vorzugsweise zwischen 25 % und 60 % und stärker bevorzugt zwischen 35 % und 50 % beträgt.4. String according to one of claims 1 to 3, wherein sections (7) of interconnected filaments (3, 5, 13) and sections (9) of non-interconnected filaments (3, 5, 13) follow one another, wherein the length portion interconnected Filaments on the overall length of the string is between 10% and 80%, preferably between 25% and 60%, and more preferably between 35% and 50%.
5. Saite nach einem der Ansprüche 1 bis 4, wobei die Filamente (3, 5, 13) in den verbundenen Abschnitten (7) über ihre Außenflächen in Längsrichtung dauerhaft miteinander verbunden sind.5. String according to one of claims 1 to 4, wherein the filaments (3, 5, 13) in the connected sections (7) are permanently connected to one another via their outer surfaces in the longitudinal direction.
6. Saite nach einem der Ansprüche 1 bis 5, wobei die Abschnitte (7) miteinander verbundener Filamente (3, 5, 13) eine Länge zwischen 20 mm und 200 mm, vorzugsweise zwischen 50 mm und 150 mm und stärker bevorzugt zwischen6. String according to one of claims 1 to 5, wherein the sections (7) of interconnected filaments (3, 5, 13) has a length between 20 mm and 200 mm, preferably between 50 mm and 150 mm, and more preferably between
80 mm und 120 mm aufweisen.80 mm and 120 mm.
7. Saite nach einem der Ansprüche 1 bis 6, wobei die Abschnitte (9) nicht miteinander verbundener Filamente (3, 5, 13) eine Länge zwischen 50 mm und 250 mm, vorzugsweise zwischen 100 mm und 200 mm und stärker bevorzugt zwischen 130 mm und 170 mm aufweisen. 7. A string according to any one of claims 1 to 6, wherein the portions (9) of non-interconnected filaments (3, 5, 13) has a length between 50 mm and 250 mm, preferably between 100 mm and 200 mm, and more preferably between 130 mm and 170 mm.
8. Saite nach einem der Ansprüche 1 bis 7, wobei die Filamente (3, 5, 13) einen Durchmesser von 0,5 mm bis 1 mm, vorzugsweise von 0,65 mm bis 0,8 mm aufweisen.8. String according to one of claims 1 to 7, wherein the filaments (3, 5, 13) have a diameter of 0.5 mm to 1 mm, preferably from 0.65 mm to 0.8 mm.
9. Verfahren zur Herstellung einer Saite (1) für einen Ballspielschläger, insbesondere einer Saite nach einem der Ansprüche 1 bis 8, mit den Schritten: a) Bereitstellen mindestens zweier Saiten-Filamente (3, 5, 13); b) Zusammenfuhren der Saiten-Filamente (3, 5, 13) zu einer parallel verlaufenden Konfiguration; c) abschnittsweise Verbinden der Saiten-Filamente (3, 5, L3).9. A method for producing a string (1) for a ball game racket, in particular a string according to one of claims 1 to 8, comprising the steps of: a) providing at least two string filaments (3, 5, 13); b) merging the string filaments (3, 5, 13) into a parallel configuration; c) partially connecting the string filaments (3, 5, L3).
10. Verfahren nach Anspruch 9, wobei die Saiten-Filamente (3, 5, 13) vor dem Zusammenführungsschritt beschichtet werden.10. The method of claim 9, wherein the string filaments (3, 5, 13) are coated prior to the combining step.
11. Verfahren nach Anspruch 9 oder 10, wobei das abschnittsweise Verbinden der Saiten-Filamente (3, 5, 13) durch Einwirkung einer erhöhten Temperatur, UV- Licht und/oder Laserlicht bewerkstelligt wird.11. The method according to claim 9 or 10, wherein the sections connecting the string filaments (3, 5, 13) is accomplished by the action of an elevated temperature, UV light and / or laser light.
12. Verfahren zur Herstellung einer Saite (1) für einen Ballschläger, insbesondere einer Saite nach einem der Ansprüche 1 bis 8, mit den Schritten: a) Bereitstellen einer Saite; und b) abschnittsweise Schlitzen der Saite, um mindestens zwei parallel zueinander verlaufende Filamente (3, 5, 13) der Saite (1) zu erzeugen, die lediglich abschnittsweise miteinander verbunden sind. 12. A method for producing a string (1) for a ball racquet, in particular a string according to any one of claims 1 to 8, comprising the steps of: a) providing a string; and b) slitting the string in sections in order to produce at least two mutually parallel filaments (3, 5, 13) of the string (1), which are connected only in sections.
EP08773883.7A 2007-07-05 2008-07-04 Multi-string element for a racquet for ball games Active EP2164580B1 (en)

Applications Claiming Priority (2)

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DE102007031240A DE102007031240B4 (en) 2007-07-05 2007-07-05 Multiple string for a ball game racket
PCT/EP2008/005510 WO2009003723A1 (en) 2007-07-05 2008-07-04 Multi-string element for a racquet for ball games

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EP2164580A1 true EP2164580A1 (en) 2010-03-24
EP2164580B1 EP2164580B1 (en) 2016-09-14

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US (1) US20100298076A1 (en)
EP (1) EP2164580B1 (en)
JP (1) JP5221652B2 (en)
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WO (1) WO2009003723A1 (en)

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DE102007031240A1 (en) 2009-01-08
US20100298076A1 (en) 2010-11-25
JP2010532187A (en) 2010-10-07
EP2164580B1 (en) 2016-09-14
WO2009003723A1 (en) 2009-01-08
DE102007031240B4 (en) 2009-07-23
JP5221652B2 (en) 2013-06-26

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