EP0257424A2 - Corde de tennis, cordage de tennis fait de corde de tennis et procédé de fabrication de la corde de tennis - Google Patents

Corde de tennis, cordage de tennis fait de corde de tennis et procédé de fabrication de la corde de tennis Download PDF

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Publication number
EP0257424A2
EP0257424A2 EP87111544A EP87111544A EP0257424A2 EP 0257424 A2 EP0257424 A2 EP 0257424A2 EP 87111544 A EP87111544 A EP 87111544A EP 87111544 A EP87111544 A EP 87111544A EP 0257424 A2 EP0257424 A2 EP 0257424A2
Authority
EP
European Patent Office
Prior art keywords
tennis
core
string
coated
tennis string
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Withdrawn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
EP87111544A
Other languages
German (de)
English (en)
Other versions
EP0257424A3 (en
Inventor
Otto Schwertl
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 EP0257424A2 publication Critical patent/EP0257424A2/fr
Publication of EP0257424A3 publication Critical patent/EP0257424A3/de
Withdrawn legal-status Critical Current

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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 tennis string made of a coated elastic core made of untwisted or twisted plastic fibers, a tennis racket stringing consisting thereof and a method for producing the tennis string.
  • gut strings do have the required elasticity, ball acceleration and playing comfort properties, but have the very big disadvantage that a long lifespan is not guaranteed and, on the other hand, can only be played depending on the weather, ie only in completely dry weather; because the gut string is very sensitive even when there is noticeable humidity or even rain, then fibers and tears very quickly, which is perceived by the players as a very big disadvantage because of the relatively expensive cost price.
  • the synthetic string In contrast to the gut string, the synthetic string has a longer lifespan, is weather-independent and cheaper, but lacks the main properties that a tennis string should have, namely good elasticity and high ball acceleration.
  • a core made of twisted wire or fiber material for. B. made of steel wire, glass fibers or carbon fibers, and coated with plastic, in particular a fluorocarbon resin.
  • the invention has for its object to develop a tennis string of the type mentioned that an even better combination of the desired properties, ie. H. the elasticity, the high ball acceleration, the tensile strength and the playing comfort when used as a tennis racket string, with a weather independence and a comparable or superior life expectancy to plastic strings, and to specify a manufacturing process for this tennis string.
  • the desired properties ie. H. the elasticity, the high ball acceleration, the tensile strength and the playing comfort when used as a tennis racket string, with a weather independence and a comparable or superior life expectancy to plastic strings, and to specify a manufacturing process for this tennis string.
  • the core fibers consist of aramid "KEVLAR” (R).
  • the invention also relates to the tennis racket stringing consisting of a tennis string according to the invention.
  • the stated object is achieved according to the invention by a method for producing the tennis string with the characteristic that an elastic core made of untwisted or twisted, e.g. braided aramid fibers is coated by extrusion.
  • the desired combination of the desired properties can be attributed to the "KEVLAR" aramid fibers as the core material.
  • the coating can also be applied to the core consisting of untwisted or twisted aramid fibers instead of by extrusion by an impregnation or immersion process.
  • a tennis string 1 which is composed of a core 2 of approximately 1.1 mm in diameter and a coating 3 of approximately 0.15 mm in thickness, so that the overall diameter is approximately 1.4 mm.
  • the core 2 consists of a large number of hair-fine, twisted, for example approximately 10,000 braided "KEVLAR" aramid fibers
  • the coating 3 consists, for example, of a fluorocarbon resin applied by extrusion at approximately 360 ° C., in particular polytetrafluoroethylene or fluoroethylene propylene or a copolymer of ethylene and tetrafluoroethylene with a smooth surface.
  • This tennis string has a tensile strength of 120 kg (1177 N) with low elongation at break as well as good fatigue resistance, vibration damping and impact resistance.
  • coatings made of polyester, polyamide or polyurethane material or a mixture of carbon and an organic binder can also be used.
  • FIG. 2 shows a tennis racket frame R with the stringing according to the invention from the tennis string 1 according to FIG. 1.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Ropes Or Cables (AREA)
EP87111544A 1986-08-11 1987-08-10 Tennis string, tennis racket stringing made of it and method of making the tennis string Withdrawn EP0257424A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19868621534 DE8621534U1 (de) 1986-08-11 1986-08-11 Tennissaite und daraus bestehende Tennisschlägerbesaitung
DE8621534U 1986-08-11

Publications (2)

Publication Number Publication Date
EP0257424A2 true EP0257424A2 (fr) 1988-03-02
EP0257424A3 EP0257424A3 (en) 1988-07-20

Family

ID=6797322

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87111544A Withdrawn EP0257424A3 (en) 1986-08-11 1987-08-10 Tennis string, tennis racket stringing made of it and method of making the tennis string

Country Status (2)

Country Link
EP (1) EP0257424A3 (fr)
DE (1) DE8621534U1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2640149A1 (fr) * 1988-12-14 1990-06-15 Cousin Freres Sa Corde synthetique de tennis ou analogue et son procede de fabrication
WO1993008880A1 (fr) * 1991-11-07 1993-05-13 Ferrari Importing Co Raquette de sport a agencement de cordes hybride
US6634968B2 (en) * 2000-09-29 2003-10-21 Peter Yeh String for a racket
US6835454B1 (en) 1999-08-24 2004-12-28 Stuart Karl Randa Fluoropolymer modification of strings for stringed sports equipment and musical instruments

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4301167C2 (de) * 1993-01-20 2001-04-19 Horst Kirschbaum Saite für die Bespannung von Ballspielschlägern

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1101384A (en) * 1963-10-18 1968-01-31 Dunlop Rubber Co Improvements relating to cords
FR2356762A1 (fr) * 1976-06-29 1978-01-27 Robin Jacques Cordes en fibres synthetiques et leur procede de fabrication
GB1531652A (en) * 1977-01-22 1978-11-08 Ashaway Line & Twine Mfg String construction and method of making same
DE3133231A1 (de) * 1981-08-21 1983-03-10 Otto 8000 München Schwertl Tennissaite, deren herstellung und verwendung fuer eine tennisschlaegerbesaitung
GB2126614A (en) * 1982-09-02 1984-03-28 Explosifs Prod Chim Racket string

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1101384A (en) * 1963-10-18 1968-01-31 Dunlop Rubber Co Improvements relating to cords
FR2356762A1 (fr) * 1976-06-29 1978-01-27 Robin Jacques Cordes en fibres synthetiques et leur procede de fabrication
GB1531652A (en) * 1977-01-22 1978-11-08 Ashaway Line & Twine Mfg String construction and method of making same
DE3133231A1 (de) * 1981-08-21 1983-03-10 Otto 8000 München Schwertl Tennissaite, deren herstellung und verwendung fuer eine tennisschlaegerbesaitung
GB2126614A (en) * 1982-09-02 1984-03-28 Explosifs Prod Chim Racket string

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2640149A1 (fr) * 1988-12-14 1990-06-15 Cousin Freres Sa Corde synthetique de tennis ou analogue et son procede de fabrication
EP0377362A1 (fr) * 1988-12-14 1990-07-11 Cousin Freres S.A. Corde synthétique de tennis ou analogue et son procédé de fabrication
WO1993008880A1 (fr) * 1991-11-07 1993-05-13 Ferrari Importing Co Raquette de sport a agencement de cordes hybride
US6835454B1 (en) 1999-08-24 2004-12-28 Stuart Karl Randa Fluoropolymer modification of strings for stringed sports equipment and musical instruments
US6634968B2 (en) * 2000-09-29 2003-10-21 Peter Yeh String for a racket

Also Published As

Publication number Publication date
EP0257424A3 (en) 1988-07-20
DE8621534U1 (de) 1987-01-15

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