EP0041962A1 - Guts for tennis rackets and similar games - Google Patents

Guts for tennis rackets and similar games

Info

Publication number
EP0041962A1
EP0041962A1 EP80902275A EP80902275A EP0041962A1 EP 0041962 A1 EP0041962 A1 EP 0041962A1 EP 80902275 A EP80902275 A EP 80902275A EP 80902275 A EP80902275 A EP 80902275A EP 0041962 A1 EP0041962 A1 EP 0041962A1
Authority
EP
European Patent Office
Prior art keywords
string according
string
core
plastic
wire
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.)
Withdrawn
Application number
EP80902275A
Other languages
German (de)
French (fr)
Inventor
Arthur E. Cadonau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0041962A1 publication Critical patent/EP0041962A1/en
Withdrawn legal-status Critical Current

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

Definitions

  • the invention relates to a string for stringing rackets for tennis and related games, such as badminton and squash.
  • a metal covering is far less sensitive to the effects of the weather, besides it has a higher tensile strength and is therefore more durable. It retains constant flexibility and resilience even under heavy use. A sufficiently high elasticity of the covering can also be achieved with the available wire materials. Finally, the metal covering rather cheaper to manufacture.
  • the use of stranded, stranded or twisted metal wire gives the covering a relatively rough surface, which makes it possible to hit the ball with a high twist effect.
  • the surface structure can be changed by using different string constructions. There is therefore also the possibility of making the covering less easy to grip, for example in order to prevent the balls from wearing out too quickly. In this sense, it may also be advantageous to provide the metal wire with a plastic sheath.
  • the string preferably has a core made of a material which is several times more elastic than the wire material, in order to increase the extensibility of the string.
  • Plastic is the primary material for the soul, e.g. Polyamide, in question.
  • the string has a plastic core, the diameter of which is greater than the thickness of the metal wire and which is tightly wrapped with several round, parallel metal wires in the form of a multi-start coil spring.
  • the ratio of diameters and the number of metal wires By choosing the ratio of diameters and the number of metal wires, the elasticity of the string can be changed within wide limits and adapted to the respective requirement. Similar elasticity values as for a conventional gut string can be achieved, for example, with a metal string of this type, the plastic core of which has a diameter of 0.7 mm and is wound with six steel wires, the diameter of which is 0.28 mm. With a larger number of metal wires running in parallel, there is a greater increase in the wire windings and thus a lower elasticity.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Ropes Or Cables (AREA)
  • Package Frames And Binding Bands (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Artificial Filaments (AREA)
  • Laminated Bodies (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)

Abstract

Les boyaux sont constitues par des fils de metal tresses, retordus ou perfores qui en comparaison avec les boyaux naturels ou en matiere plastique sont moins sensibles aux effets exterieurs et presentent une grande resistance a la traction et une flexibilite et tension constantes. Un cordage realise de cette facon a une vie plus longue et une qualite dans le jeu des balles pour le moins egale.The casings are made up of braided, twisted or perforated metal wires which, in comparison with natural or plastic casings, are less sensitive to external effects and exhibit high tensile strength and constant flexibility and tension. A string made in this way has a longer life and a quality in the ball game equal to say the least.

Description

- - - -
Saite zum Bespannen von Ballschlägern für Tennis und ver- wandte Spiele ■String for stringing tennis rackets and related games
Die Erfindung betrifft eine Saite zum Bespannen von Ball- schlägern für Tennis und verwandte Spiele, wie Badminton und Squash.The invention relates to a string for stringing rackets for tennis and related games, such as badminton and squash.
Herkömmliche Ballschläger dieser Art haben eine Bespannung aus Darm- oder Kunststoffsaiten. Wie die Erfahrung zeigt, sind solche Saiten gegen äussere Einflüsse, insbesondere gegen Wärme und Feuchtigkeit, ziemlich empfindlich, was sich durch Nachlassen der Spannung bzw. durch Weichwerden der Bespannung äussert. Kunststoff- wie Darmsaiten haben ausserde bei stärkerer Beanspruchung, insbesondere bei Verwendung der Ballschläger durch professionelle Spieler, eine meist nur geringe Lebensdauer, und zwar wegen der ver- hältnismässig geringen Zerreissfestigkeit, die unter den genannten äusseren Einflüssen eher noch abnimmt. Unter Um¬ ständen kann sich auch Luft bestimmter Beschaffenheit auf die Materialbeständigkeit ungünstig auswirken, z.B. salz¬ haltige Luft in Meeresgegenden.Conventional ball racquets of this type are covered with gut or plastic strings. As experience shows, such strings are quite sensitive to external influences, in particular to heat and moisture, which manifests itself in the weakening of the tension or in the softening of the covering. Plastic and gut strings also have a short lifespan when subjected to greater stress, especially when professional players use the racket, because of the relatively low tensile strength, which tends to decrease under the above-mentioned external influences. Under certain circumstances, air of a certain nature can also have an unfavorable effect on material resistance, e.g. salty air in marine areas.
Alle diese Nachteile lassen sich vermeiden, wenn die Ball¬ schläger mit einer Saite bespannt werden, die erfindungs- gemäss aus verseiltem, verlitztem oder drilliertem Metall¬ draht besteht. Besonders dafür geeignet ist CrNi-Stahldraht.All these disadvantages can be avoided if the ball rackets are strung with a string which, according to the invention, consists of stranded, stranded or twisted metal wire. CrNi steel wire is particularly suitable for this.
Eine Metallbespannung ist im Vergleich zu einer solchen aus Darm- oder Kunststoffsaiten weit weniger empfindlich gegen Witterungseinflüsse, weist daneben eine höhere Zerreiss¬ festigkeit auf und ist dadurch länger haltbar. Sie behält auch bei starker Beanspruchung eine gleichbleibende Flexi¬ bilität und Spannkraft. Mit den verfügbaren Drahtmateria¬ lien lässt sich zudem eine genügend hohe Elastizität der Be- Spannung erreichen. Schliesslich ist die Metallbespannung eher billiger herzustellen.Compared to that made of gut or plastic strings, a metal covering is far less sensitive to the effects of the weather, besides it has a higher tensile strength and is therefore more durable. It retains constant flexibility and resilience even under heavy use. A sufficiently high elasticity of the covering can also be achieved with the available wire materials. Finally, the metal covering rather cheaper to manufacture.
Durch die Verwendung von verseiltem, verlitztem oder dril- liertem Metalldraht erhält die Bespannung eine verhältnis- massig rauhe Oberfläche, die es ermöglicht, Ballschläge mit hoher Drallwirkung auszuführen. Dabei ist die Ober¬ flächenstruktur durch die Anwendung verschiedener Saiten¬ konstruktionen veränderbar. Es besteht also auch die Mög-, lichkeit, die Bespannung weniger griffig zu gestalten, beispielsweise um eine zu rasche Abnutzung der Bälle zu vermeiden. In diesem Sinne kann es auch von Vorteil sein, den Metalldraht mit einer Umhüllung aus Kunststoff zu ver¬ sehen.The use of stranded, stranded or twisted metal wire gives the covering a relatively rough surface, which makes it possible to hit the ball with a high twist effect. The surface structure can be changed by using different string constructions. There is therefore also the possibility of making the covering less easy to grip, for example in order to prevent the balls from wearing out too quickly. In this sense, it may also be advantageous to provide the metal wire with a plastic sheath.
Vorzugsweise weist die Saite eine Seele aus einem mehrfach elastischeren Material als das Drahtmaterial auf, um die Dehnbarkeit der Saite zu erhöhen. Als Material für die Seele kommt in erster Linie ein Kunststoff, z.B. Polyamid, in Frage.The string preferably has a core made of a material which is several times more elastic than the wire material, in order to increase the extensibility of the string. Plastic is the primary material for the soul, e.g. Polyamide, in question.
Bei einer bevorzugten Ausführungsform der Erfindung weist die Saite eine Kunststoffseele auf, deren Durchmesser grös- ser ist als die Dicke des Metalldrahtes und die mit mehre¬ ren runden, parallel laufenden Metalldrähten in Form einer mehrgängigen Schraubenfeder dicht umwickelt ist. Durch Wahl der Durchmesserverhältnisse und Anzahl der Metall¬ drähte lässt sich die Elastizität der Saite in weiten Gren¬ zen verändern und dem jeweiligen Bedarf anpassen. Aehn- liche Elastizitätswerte wie bei einer üblichen Darmsaite erreicht man beispielsweise mit einer derartigen Metall¬ saite, deren Kunststoffseele einen Durchmesser von 0,7 mm hat und mit sechs Stahldrähten bewickelt ist, deren Durch¬ messer 0,28 mm beträgt. Bei einer grösseren Anzahl paral¬ lel laufender Metalldrähte ergibt sich eine grössere Stei- gung der Drahtwindungen und damit eine geringere Elastizi- - -In a preferred embodiment of the invention, the string has a plastic core, the diameter of which is greater than the thickness of the metal wire and which is tightly wrapped with several round, parallel metal wires in the form of a multi-start coil spring. By choosing the ratio of diameters and the number of metal wires, the elasticity of the string can be changed within wide limits and adapted to the respective requirement. Similar elasticity values as for a conventional gut string can be achieved, for example, with a metal string of this type, the plastic core of which has a diameter of 0.7 mm and is wound with six steel wires, the diameter of which is 0.28 mm. With a larger number of metal wires running in parallel, there is a greater increase in the wire windings and thus a lower elasticity. - -
tat der Saite, d.h. die Bespannung eines Ballschlägers mit dieser Saite wird härter, und umgekehrt.did the string, i.e. stringing a ball racket with this string becomes harder, and vice versa.
Mehrere parallel laufende runde Metalldrähte lassen sich ersetzen durch einen einzigen rechteckigen Metalldraht mit gleichem Gesamtquerschnitt. Die Seele der Saite kann also auch mit einem oder mehreren rechteckigen Metalldrähten in Form einer ein- oder mehrgängigen Schraubenfeder dicht um¬ wickelt sein.Several round metal wires running in parallel can be replaced by a single rectangular metal wire with the same overall cross-section. The core of the string can also be tightly wrapped with one or more rectangular metal wires in the form of a single or multi-start coil spring.
Es besteht bei derart aufgebauten Metallsaiten auch die Möglichkeit, eine innere Vorspannung zu erzielen, indem den aneinanderliegenden Metalldrahtwindungen bei der Her¬ stellung eine gegenseitige Vorspannung erteilt wird. With metal strings constructed in this way, there is also the possibility of achieving an internal pretension by imparting a mutual pretension to the metal wire windings lying against one another during manufacture.

Claims

Patentansprüche Claims
1. Saite zum Bespannen von Ballschlägern für Tennis und verwandte Spiele, dadurch gekennzeichnet, dass sie aus verseiltem, verlitzte oder drillierte Metalldraht be¬ steht.1. String for covering ball rackets for tennis and related games, characterized in that it consists of stranded, stranded or twisted metal wire.
2. Saite nach Anspruch 1, dadurch gekennzeichnet, dass sie aus CrNi-Stahldraht besteht.2. String according to claim 1, characterized in that it consists of CrNi steel wire.
3. Saite nach Anspruch 1, dadurch gekennzeichnet, dass der Metalldraht eine Umhüllung aus Kunststoff aufweist.3. String according to claim 1, characterized in that the metal wire has a covering made of plastic.
4. Saite nach Anspruch 1, dadurch gekennzeichnet, dass sie eine Seele aus einem mehrfach elastischeren Material als das Drahtmaterial aufweist.4. String according to claim 1, characterized in that it has a core made of a material which is more elastic than the wire material.
5. Saite nach Anspruch 4, dadurch gekennzeichnet, dass sie eine Seele aus Kunststoff aufweist.5. String according to claim 4, characterized in that it has a core made of plastic.
6. Saite nach Anspruch 4, dadurch gekennzeichnet, dass der Durchmesser der Seele grösser ist als die Dicke des Me¬ talldrahtes.6. String according to claim 4, characterized in that the diameter of the core is larger than the thickness of the metal wire.
7. Saite nach Anspruch 4, dadurch gekennzeichnet, dass die Seele mit mehreren runden, parallel laufenden Metall¬ drähten in Form einer mehrgängigen Schraubenfeder dicht umwickelt ist.7. String according to claim 4, characterized in that the core is tightly wrapped with several round, parallel running Metall¬ wires in the form of a multi-start coil spring.
8. Saite nach Anspruch 4, dadurch gekennzeichnet, dass die Seele mit einem oder mehreren rechteckigen Metalldräh¬ ten in Form einer ein- oder mehrgängigen Schraubenfeder dicht umwickelt ist. 8. String according to claim 4, characterized in that the core is tightly wrapped with one or more rectangular metal wires in the form of a single or multi-start coil spring.
9. Saite nach Anspruch 1, dadurch gekennzeichnet, dass sie eine innere Vorspannung aufweist. 9. String according to claim 1, characterized in that it has an internal bias.
EP80902275A 1979-12-22 1980-12-11 Guts for tennis rackets and similar games Withdrawn EP0041962A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1137779 1979-12-22
CH11377/79 1979-12-22

Publications (1)

Publication Number Publication Date
EP0041962A1 true EP0041962A1 (en) 1981-12-23

Family

ID=4372922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80902275A Withdrawn EP0041962A1 (en) 1979-12-22 1980-12-11 Guts for tennis rackets and similar games

Country Status (15)

Country Link
EP (1) EP0041962A1 (en)
JP (1) JPS56501788A (en)
KR (1) KR830003912A (en)
BE (1) BE886530A (en)
BR (1) BR8008989A (en)
DD (1) DD155388A5 (en)
ES (1) ES264639Y (en)
GR (1) GR72806B (en)
IT (1) IT1134801B (en)
NO (1) NO812807L (en)
PL (1) PL228604A1 (en)
PT (1) PT72257B (en)
RO (1) RO82237B (en)
WO (1) WO1981001797A1 (en)
ZA (1) ZA807362B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4216739A1 (en) * 1992-05-21 1993-11-25 Vontec String for stringing racquets
WO1994021332A1 (en) * 1993-03-17 1994-09-29 Kosmin, Gerald, Emmanuel Sports racket string
CN109331436A (en) * 2018-11-24 2019-02-15 邬惠林 There is the shuttlecock steel wire of certain elasticity to clap line
JP2021168818A (en) * 2020-04-16 2021-10-28 朝日インテック株式会社 Racket string and racket

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR490371A (en) * 1918-06-04 1919-04-19 Seneca Green Lewis Rope network for snowshoes and similar objects
FR550656A (en) * 1921-09-06 1923-03-15 Improvements to rackets for tennis, lawn tennis and other similar games
US1531862A (en) * 1922-01-30 1925-03-31 Dayton Steel Racquet Company Metal stringing for tennis rackets
GB199840A (en) * 1922-04-03 1923-07-03 William Augustus Larned Improvements in tennis rackets and the like
CH278315A (en) * 1948-04-24 1951-10-15 Lycon As Metal string with several strands twisted together.
DE1150913B (en) * 1959-11-05 1963-06-27 Vojtech Vodicka Steel-reinforced string for rackets
DE2449479A1 (en) * 1974-10-19 1976-04-22 Lipa Lizenz Und Patentverwertu Gut strings for tennis or badminton - strings flattened at their cross-over points
DE2651659A1 (en) * 1976-11-12 1978-05-18 Ruediger Lothar Von Di Reppert Tennis-racket strings coated in foam plastic or rubber - have roughened surfaces

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8101797A1 *

Also Published As

Publication number Publication date
DD155388A5 (en) 1982-06-09
ES264639U (en) 1982-11-16
ZA807362B (en) 1981-11-25
ES264639Y (en) 1983-05-16
BE886530A (en) 1981-04-01
GR72806B (en) 1983-12-05
WO1981001797A1 (en) 1981-07-09
PL228604A1 (en) 1981-08-21
KR830003912A (en) 1983-06-30
PT72257A (en) 1981-01-01
RO82237B (en) 1984-07-30
IT8026773A0 (en) 1980-12-19
RO82237A (en) 1984-05-23
NO812807L (en) 1981-08-20
BR8008989A (en) 1981-10-20
IT1134801B (en) 1986-08-20
PT72257B (en) 1982-01-21
JPS56501788A (en) 1981-12-10

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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17P Request for examination filed

Effective date: 19811023

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19831004