EP0628326A1 - Ridged racket string - Google Patents

Ridged racket string Download PDF

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Publication number
EP0628326A1
EP0628326A1 EP94401160A EP94401160A EP0628326A1 EP 0628326 A1 EP0628326 A1 EP 0628326A1 EP 94401160 A EP94401160 A EP 94401160A EP 94401160 A EP94401160 A EP 94401160A EP 0628326 A1 EP0628326 A1 EP 0628326A1
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EP
European Patent Office
Prior art keywords
filaments
diameter
central core
tennis string
tennis
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
EP94401160A
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German (de)
French (fr)
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EP0628326B1 (en
Inventor
Maurice Turquety
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DASNI
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DASNI
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Publication of EP0628326B1 publication Critical patent/EP0628326B1/en
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    • 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
    • A63B51/02—Strings; String substitutes; Products applied on strings, e.g. for protection against humidity or wear
    • A63B51/026—Strings having non-circular cross-section

Definitions

  • the present invention relates to a ribbed tennis string.
  • Tennis rackets include a sieve in which a string is stretched, which alone comes into contact with the ball.
  • the players can thus give effect to the ball according to the way they hold the racket, that is to say according to the angle that the sieve makes with respect to the ball and according to the movement of this sieve.
  • the sieve is moved along a trajectory which combines a curve which is substantially tangential to the ball with a translation from back to front.
  • Patent No. FR-A-2 987 058 is thus known. It turns out that the existing ropes are not entirely satisfactory because it is necessary not only that there is a groove but also that this groove must be positioned correctly relative to the ball.
  • the rib must protrude relative to the sieve and this in line with each crossing of two ropes of this sieve.
  • the positioning of the rib is random so that the effects obtained are not as well rendered in practice. It is therefore imperative that the rib is positioned before striking and that it is maintained in this position during striking.
  • the tennis string according to the invention of the type comprising a central core, first outer filaments wound helically around this central core, of a diameter d and second outer filaments interposed between the first filaments, with a diameter D greater than d , the entire winding being embedded in a coating resin, is characterized in that the number of second filaments is odd and at least equal to three so that they are positioned at the vertices of an isosceles triangle.
  • this tennis string comprises five filaments of diameter D , arranged regularly on the periphery, the diameters D , d being such that there is a straight line tangent to the two filaments of diameter D , this straight line forming a support base.
  • the five filaments are made of an abrasion-resistant material, more particularly graphite.
  • the cord comprises a core of diameter 0.80 mm, the first and second filaments having respective diameters of 0.18 and 0.30 mm, the coating resin leading at an outside diameter around the first filament of 1.30 mm and outside the second filament of 1.50 mm.
  • the present invention is described below with reference to the single figure which represents a perspective view of a portion of tennis string according to the invention which comprises a central core 10, made of a synthetic material which is obtained by wire drawing, while at the periphery of this central core 10 the first filaments 12 of a diameter d are wound helically as well as second filaments 14 interposed between the first filaments 12.
  • the cord comprises eight first filaments 12 of diameter d , distributed in pairs with the interposition of five second filaments 14 of diameter D greater than the diameter d of the first filaments.
  • the set of diameters is studied so that three of the second filaments out of the five constitute a triangle T shown in phantom in the figure, this triangle T being isosceles, with a second filament 16 at its top and two second filaments 18 at both ends from its base.
  • a coating resin 20 ensures the blocking of the various filaments and the connection with the central core 10.
  • the stable position leads to an orientation such that a large diameter filament is imperatively on the opposite side and therefore protrudes at the crossing point.
  • this rope allows sliding base against base, which allows a repositioning of the strings between them, in particular at the crossroads, thanks to the elasticity of these strings and their prior tension.
  • Such Positioning leads to very high stress on the protruding filament and in order to increase the longevity of the cord according to the invention, it is advisable to produce the large diameter filaments from an abrasion-resistant material, in particular graphite. .
  • the cord which has just been described comprises a core 10 with a diameter of 0.80 mm, the first and second filaments have effective diameters of 0.18 mm and 0.30 mm. so as to lead to outside diameters after resin coating of 1.30 mm in line with small diameter filaments and 1.50 mm in line with large diameter filaments.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Ropes Or Cables (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Artificial Filaments (AREA)
  • Decoration Of Textiles (AREA)

Abstract

String for tennis, comprising a central core (10), first outer filaments (12) rolled helically around this central core, having a diameter d, and second outer filaments (14) inserted between the first filaments, having a diameter D greater than d, the wound package (winding) as a whole being embedded in a coating resin, characterised in that there is an odd number, at least three, of second filaments, these three second filaments being arranged at the vertices of an isosceles triangle. <IMAGE>

Description

La présente invention a pour objet un cordage de tennis à nervures.The present invention relates to a ribbed tennis string.

Les raquettes de tennis comprennent un tamis dans le cadre duquel est tendu un cordage qui, seul vient au contact de la balle.Tennis rackets include a sieve in which a string is stretched, which alone comes into contact with the ball.

On sait que les techniques de frappe de balle sont variées.We know that ball striking techniques are varied.

Les joueurs peuvent ainsi donner de l'effet à la balle suivant la façon dont ils tiennent la raquette, c'est-à-dire selon l'angle que fait le tamis par rapport à la balle et selon le déplacement de ce tamis.The players can thus give effect to the ball according to the way they hold the racket, that is to say according to the angle that the sieve makes with respect to the ball and according to the movement of this sieve.

Ainsi, on obtient des effets de "lift" ou de "slice".Thus, we obtain "lift" or "slice" effects.

Pour le "lift", par exemple, le tamis est déplacé suivant une trajectoire qui combine une courbe qui est sensiblement tangentielle à la balle avec une translation de l'arrière vers l'avant.For the "lift", for example, the sieve is moved along a trajectory which combines a curve which is substantially tangential to the ball with a translation from back to front.

Afin de donner tout son effet à la balle, il est nécessaire d'éviter le glissement de cette balle par rapport au cordage du tamis durant le temps très court où la balle est en contact avec ce tamis.In order to give its full effect to the ball, it is necessary to avoid the sliding of this ball relative to the stringing of the sieve during the very short time when the ball is in contact with this sieve.

Des perfectionnements ont été mis au point et notamment des cordages avec des nervures.Improvements have been developed and in particular ropes with ribs.

On connaît ainsi le brevet N° FR-A-2 987 058. Il se trouve que les cordages existants ne donnent pas entière satisfaction car il faut non seulement qu'il existe une rainure mais également que cette rainure soit positionnée correctement par rapport à la balle.Patent No. FR-A-2 987 058 is thus known. It turns out that the existing ropes are not entirely satisfactory because it is necessary not only that there is a groove but also that this groove must be positioned correctly relative to the ball.

A cet effet, la nervure doit être en saillie par rapport au tamis et ceci au droit de chaque croisement de deux cordages de ce tamis.For this purpose, the rib must protrude relative to the sieve and this in line with each crossing of two ropes of this sieve.

Dans les exemples de l'art antérieur, le positionnement de la nervure est aléatoire si bien que les effets obtenus ne sont pas aussi bien rendus dans la pratique. Il est donc impératif que la nervure soit positionnée préalablement à la frappe et qu'elle soit maintenue dans cette position durant la frappe.In the examples of the prior art, the positioning of the rib is random so that the effects obtained are not as well rendered in practice. It is therefore imperative that the rib is positioned before striking and that it is maintained in this position during striking.

A cet effet, le cordage de tennis selon l'invention, du type comprenant une âme centrale, des premiers filaments extérieurs enroulés de façon hélicoïdale autour de cette âme centrale, d'un diamètre d et des seconds filaments extérieurs intercalés entre les premiers filaments, d'un diamètre D supérieur à d, l'ensemble de l'enroulement étant noyé dans une résine d'enduction, se caractérise en ce que le nombre de seconds filaments est impair et au moins égal à trois de façon qu'ils soient positionner aux sommets d'un triangle isocèle.To this end, the tennis string according to the invention, of the type comprising a central core, first outer filaments wound helically around this central core, of a diameter d and second outer filaments interposed between the first filaments, with a diameter D greater than d , the entire winding being embedded in a coating resin, is characterized in that the number of second filaments is odd and at least equal to three so that they are positioned at the vertices of an isosceles triangle.

Selon un mode de réalisation préférentiel de l'invention, ce cordage de tennis comprend cinq filaments de diamètre D, disposés de façon régulière sur la périphérie, les diamètre D, d étant tels qu'il existe une droite tangente aux deux filaments de diamètre D, cette droite formant une base d'appui.According to a preferred embodiment of the invention, this tennis string comprises five filaments of diameter D , arranged regularly on the periphery, the diameters D , d being such that there is a straight line tangent to the two filaments of diameter D , this straight line forming a support base.

Selon un mode de réalisation particulier de l'invention, les cinq filaments sont réalisés en un matériau résistant à l'abrasion, plus particulièrement du graphite.According to a particular embodiment of the invention, the five filaments are made of an abrasion-resistant material, more particularly graphite.

Ainsi, selon un mode de réalisation spécifique de l'invention, le cordage comprend une âme de diamètre 0,80 mm, les premiers et seconds filaments ayant des diamètres respectifs de 0,18 et 0,30 mm, la résine d'enduction conduisant à un diamètre extérieur autour du premier filament de 1,30 mm et extérieur au second filament de 1,50 mm.Thus, according to a specific embodiment of the invention, the cord comprises a core of diameter 0.80 mm, the first and second filaments having respective diameters of 0.18 and 0.30 mm, the coating resin leading at an outside diameter around the first filament of 1.30 mm and outside the second filament of 1.50 mm.

La présente invention est décrite ci-après en regard de la figure unique qui représente une vue en perspective d'une portion de cordage de tennis selon l'invention qui comprend une âme centrale 10, réalisée en un matériau synthétique qui est obtenu par tréfilage, tandis qu'à la périphérie de cette âme centrale 10 les premiers filaments 12 d'un diamètre d sont enroulés de façon hélicoïdale ainsi que des seconds filaments 14 interposés entre les premiers filaments 12.The present invention is described below with reference to the single figure which represents a perspective view of a portion of tennis string according to the invention which comprises a central core 10, made of a synthetic material which is obtained by wire drawing, while at the periphery of this central core 10 the first filaments 12 of a diameter d are wound helically as well as second filaments 14 interposed between the first filaments 12.

Dans le mode de réalisation présenté, le cordage comprend huit premiers filaments 12 de diamètre d, répartis par paires avec interposition de cinq seconds filaments 14 de diamètre D supérieur au diamètre d des premiers filaments.In the embodiment presented, the cord comprises eight first filaments 12 of diameter d , distributed in pairs with the interposition of five second filaments 14 of diameter D greater than the diameter d of the first filaments.

Ceci est bien visible sur la coupe de l'extrémité du cordage.This is clearly visible on the cut at the end of the rope.

L'ensemble des diamètres est étudié pour que trois des seconds filaments sur les cinq constituent un triangle T représenté en trait mixte sur la figure, ce triangle T étant isocèle, avec un second filament 16 à son sommet et deux seconds filaments 18 aux deux extrémités de sa base.The set of diameters is studied so that three of the second filaments out of the five constitute a triangle T shown in phantom in the figure, this triangle T being isosceles, with a second filament 16 at its top and two second filaments 18 at both ends from its base.

Ainsi que cela est représenté sur la figure, entre les deux seconds filaments 18, constituant la base du triangle T, sont intercalés deux premiers filaments 12 et les diamètres des filaments sont tels que cette paire de premiers filaments et les deux filaments 18 constituant les extrémités de la base du triangle T sont tangents à une même droite D.As shown in the figure, between the two second filaments 18, constituting the base of the triangle T , are interposed two first filaments 12 and the diameters of the filaments are such that this pair of first filaments and the two filaments 18 constituting the ends from the base of the triangle T are tangent to the same line D.

Une résine d'enduction 20 assure le blocage des différents filaments et la liaison avec l'âme centrale 10.A coating resin 20 ensures the blocking of the various filaments and the connection with the central core 10.

Elle crée une surépaisseur constante sur toute la périphérie du cordage et ne modifie pas le positionnement des filaments.It creates a constant excess thickness over the entire periphery of the rope and does not modify the positioning of the filaments.

Dans le mode de réalisation représenté, on constate que quelle que soit la rotation du cordage, celui-ci se placera toujours en position stable en appui sur le cordage avec lequel il est croisé.In the embodiment shown, it can be seen that whatever the rotation of the rope, it will always be placed in a stable position by pressing on the rope with which it is crossed.

Or la position stable conduit à une orientation telle qu'un filament de gros diamètre se trouve impérativement du côté opposé et fait donc saillie au droit du croisement.However, the stable position leads to an orientation such that a large diameter filament is imperatively on the opposite side and therefore protrudes at the crossing point.

On remarque que ce cordage autorise le glissement base contre base, ce qui permet un repositionnement des cordages entre eux, notamment au droit des croisements, grâce à l'élasticité de ces cordages et à leur tension préalable.We note that this rope allows sliding base against base, which allows a repositioning of the strings between them, in particular at the crossroads, thanks to the elasticity of these strings and their prior tension.

Un tel Positionnement conduit à une sollicitation très importante du filament mis en saillie et de façon à accroître la longévité du cordage selon l'invention, il est judicieux de réaliser les filaments de gros diamètre en un matériau résistant à l'abrasion, notamment en graphite.Such Positioning leads to very high stress on the protruding filament and in order to increase the longevity of the cord according to the invention, it is advisable to produce the large diameter filaments from an abrasion-resistant material, in particular graphite. .

Afin de fixer des ordres de grandeur, le cordage qui vient d'être décrit comprend une âme 10 d'un diamètre de 0,80 mm, les premiers et seconds filaments ont des diamètres effectifs de 0,18 mm et 0,30 mm de façon à conduire à des diamètres extérieurs après enrobage de résine de 1,30 mm au droit des filaments de petit diamètre et 1,50 mm au droit des filaments de gros diamètre.In order to fix orders of magnitude, the cord which has just been described comprises a core 10 with a diameter of 0.80 mm, the first and second filaments have effective diameters of 0.18 mm and 0.30 mm. so as to lead to outside diameters after resin coating of 1.30 mm in line with small diameter filaments and 1.50 mm in line with large diameter filaments.

Claims (5)

Cordage de tennis comprenant une âme centrale (10), des premiers filaments (12) extérieurs enroulés de façon hélicoïdale autour de cette âme centrale, d'un diamètre d, et des seconds filaments (14) extérieurs intercalés entre les premiers filaments, d'un diamètre D supérieur à d, l'ensemble de l'enroulement étant noyé dans une résine d'enduction caractérisé en ce que le nombre de seconds filaments est impair, au moins égal à trois, ces trois seconds filaments étant disposés aux sommets d'un triangle isocèle.Tennis string comprising a central core (10), first outer filaments (12) wound helically around this central core, of a diameter d , and second outer filaments (14) interposed between the first filaments, a diameter D greater than d , the entire winding being embedded in a coating resin characterized in that the number of second filaments is odd, at least equal to three, these three second filaments being arranged at the tops of an isosceles triangle. Cordage de tennis selon la revendication 1, caractérisé en ce qu'il comprend au moins cinq seconds filaments de diamètre D, répartis annulairement de façon régulière à la périphérie de l'âme centrale, les diamètres D et d étant tels qu'il existe une droite tangente aux deux seconds filaments successifs de façon à constituer une base d'appui.Tennis string according to claim 1, characterized in that it comprises at least five second filaments of diameter D , annularly distributed regularly at the periphery of the central core, the diameters D and d being such that there is a straight tangent to the two successive second filaments so as to constitute a support base. Cordage de tennis selon la revendication 2, caractérisé en ce que les cinq seconds filaments sont réalisés en un matériau résistant à l'abrasion.Tennis string according to claim 2, characterized in that the five second filaments are made of an abrasion resistant material. Cordage de tennis selon la revendication 3, caractérisé en ce que le matériau retenu est du graphite.Tennis string according to claim 3, characterized in that the material retained is graphite. Cordage de tennis selon l'une quelconque des revendications précédentes, caractérisé en ce que l'âme (10) a un diamètre de 0,80 mm, les premiers (12) et seconds (14) filaments ont des diamètres respectifs de 0,18 et 0,30 mm, l'enduction de résine conduisant à un diamètre extérieur au droit des premiers filaments de 1,30 mm et au droit du second filament de 1,50 mm.Tennis string according to any one of the preceding claims, characterized in that the core (10) has a diameter of 0.80 mm, the first (12) and second (14) filaments have respective diameters of 0.18 and 0.30 mm, the coating of resin leading to an outside diameter to the right of the first filaments of 1.30 mm and to the right of the second filament of 1.50 mm.
EP94401160A 1993-06-01 1994-05-25 Ridged racket string Expired - Lifetime EP0628326B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9306520 1993-06-01
FR9306520A FR2705902B1 (en) 1993-06-01 1993-06-01 Ribbed tennis string.

Publications (2)

Publication Number Publication Date
EP0628326A1 true EP0628326A1 (en) 1994-12-14
EP0628326B1 EP0628326B1 (en) 1997-01-15

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EP94401160A Expired - Lifetime EP0628326B1 (en) 1993-06-01 1994-05-25 Ridged racket string

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EP (1) EP0628326B1 (en)
AT (1) ATE147649T1 (en)
DE (1) DE69401460D1 (en)
FR (1) FR2705902B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012126896A1 (en) * 2011-03-24 2012-09-27 Huret Olivier String used for stringing all or part of a tennis racket, stringed tennis racket and associated stringing method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4084399A (en) * 1976-03-31 1978-04-18 Nippon Carbon Kabushiki Kaisha Gut for racket
US4860531A (en) * 1987-12-16 1989-08-29 Wells D Phillips Racquet strings
WO1991011549A1 (en) * 1990-01-26 1991-08-08 Chen Sam Hsin Shun Ridged racquet string
US5145172A (en) * 1989-05-05 1992-09-08 Gosen Co., Ltd. String for racket

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4084399A (en) * 1976-03-31 1978-04-18 Nippon Carbon Kabushiki Kaisha Gut for racket
US4860531A (en) * 1987-12-16 1989-08-29 Wells D Phillips Racquet strings
US5145172A (en) * 1989-05-05 1992-09-08 Gosen Co., Ltd. String for racket
WO1991011549A1 (en) * 1990-01-26 1991-08-08 Chen Sam Hsin Shun Ridged racquet string

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012126896A1 (en) * 2011-03-24 2012-09-27 Huret Olivier String used for stringing all or part of a tennis racket, stringed tennis racket and associated stringing method
FR2972937A1 (en) * 2011-03-24 2012-09-28 Olivier Huret ROPE USED FOR THE ROPE OF ALL OR PART OF TENNIS RACKET (S) AND TENNIS RAQUETTE CORDED WITH A ROPE MADE THEREFROM

Also Published As

Publication number Publication date
ATE147649T1 (en) 1997-02-15
FR2705902B1 (en) 1995-07-21
FR2705902A1 (en) 1994-12-09
DE69401460D1 (en) 1997-02-27
EP0628326B1 (en) 1997-01-15

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