US20080096701A1 - Strings of sport rackets and method for making the same - Google Patents

Strings of sport rackets and method for making the same Download PDF

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Publication number
US20080096701A1
US20080096701A1 US11/797,916 US79791607A US2008096701A1 US 20080096701 A1 US20080096701 A1 US 20080096701A1 US 79791607 A US79791607 A US 79791607A US 2008096701 A1 US2008096701 A1 US 2008096701A1
Authority
US
United States
Prior art keywords
wires
string
strings
core wire
present
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.)
Abandoned
Application number
US11/797,916
Other languages
English (en)
Inventor
Tsan-Ching Wang
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.)
Yaoi Fabric Co Ltd
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
Assigned to YAO I FABRIC CO., LTD. reassignment YAO I FABRIC CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WANG, TSAN-CHING
Publication of US20080096701A1 publication Critical patent/US20080096701A1/en
Abandoned 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
    • 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 method for making strings for sport rackets wherein no acid-wash is needed in the method, and the string includes at least two wires of different materials.
  • the strings for sport rackets are required to absorb more energy when the ball hits the net of the sport racket and the stored energy transfers to the ball which then bounces back at high speed.
  • the conventional strings are made by Nylon, artificial fibers, catgut, or semi-catgut, wherein the artificial fibers are most welcomed for the strings.
  • the conventional string includes a plurality of wires which are twined with each other so as to form a string having high resilient feature and durable for being used for long time.
  • the conventional method for making the strings for sport rackets includes steps of extruding, acid-washing and twining.
  • extruding “A” wire and “B” wire both of the “A” wire and “B” wire are acid-washed to have rough surfaces, and the acid-washed “A” wire and “B” wire are twined at a pre-set arrangement.
  • a material “C” is poured into the twining machine during twining the “A” wire and “B” wire so as to form a string.
  • the present invention intends to provide a method for making strings for sport rackets and only one machine is needed, and no acid-washing step is involved.
  • the present invention relates to a method for making strings for sport rackets and the method includes a step of extruding two wires of different materials and a step of twining the two wires along an axis to form a string.
  • the present invention relates to a string for sport rackets and the string includes a core wire of a first material and a sun-wire of a second material is twined to the core wire.
  • the primary object of the present invention is to provide a method that uses only one machine to make the string of sport rackets and no acid-wash step is needed.
  • FIG. 1 shows the two steps of the method of the present invention
  • FIG. 2 shows the arrangement of the machine for making the string of the present invention
  • FIG. 3 is a cross sectional view to show the string of the present invention
  • FIG. 4 is a cross sectional view to show another embodiment the string of the present invention.
  • FIG. 5 is a cross sectional view to show yet another embodiment of the string of the present invention.
  • FIG. 6 is a cross sectional view to show yet another embodiment of the string of the present invention.
  • FIG. 7 is a cross sectional view to show yet another embodiment of the string of the present invention.
  • FIG. 8 is a cross sectional view to show yet another embodiment the string of the present invention.
  • FIG. 9 shows steps of a conventional method for making a string of sport rackets.
  • the method for making strings of the present invention for sport rackets comprises the following steps:
  • a step of twining twining the two wires along an axis to form a string.
  • the method is completed on one machine 10 which includes an extruder 20 and two tanks 21 , 22 are connected to the extruder 20 .
  • Two different materials “A” and “B” are respectively received in the two tanks 21 , 22 and fed into the extruder 20 .
  • the extruder 20 extrudes a core wire 51 by the material “A” and twelve sub-wires 52 by the second material “B”.
  • Each of the core wire 51 and the sub-wires 52 has a circular cross section.
  • a third tank 23 is connected to a twining device 30 and a third material “C” is received in the third tank 23 .
  • the core wire 51 and the sub-wires 52 are twined to each other by the twining device 30 and the material “C” is added during twining so as to fill the space between the core wire 51 and the sub-wires 52 to form a string 50 .
  • the string 50 can be made in the machine 10 and no acid-washing step is needed. Because the acid-washing step might damage the surface of the core wire 51 and the sub-wires 52 and causes loss of resilient feature, so that the method of the present invention ensures that the core wire 51 and the sub-wires 52 are reliable as they really are.
  • the string 50 of the present invention can be made to have smaller diameter while all of the desired features are included so that the method can save a lot of material.
  • FIG. 4 shows that a plurality of core wires 51 are used and twined to be the string 50 and the material “C” is used to fill the gaps between the core wires 51 and to be coated on the outer surface of the string 50 .
  • FIG. 5 shows a core wire 51 having a larger diameter and a plurality of sub-wires 52 with smaller diameter are twined to the core wire 51 .
  • the material “C” is used to fill the gaps between the core wires 51 and the sub-wires 52 , and to be coated on the outer surface of the string 50 .
  • FIGS. 6 to 8 disclose different types and shapes of the strings 50 by the three materials “A”, “B” and “C”.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Ropes Or Cables (AREA)
US11/797,916 2006-10-24 2007-05-09 Strings of sport rackets and method for making the same Abandoned US20080096701A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW095139216A TW200819563A (en) 2006-10-24 2006-10-24 An extruding forming manufacturing method of a racket thread and its products
TW095139216 2006-10-24

Publications (1)

Publication Number Publication Date
US20080096701A1 true US20080096701A1 (en) 2008-04-24

Family

ID=39272232

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/797,916 Abandoned US20080096701A1 (en) 2006-10-24 2007-05-09 Strings of sport rackets and method for making the same

Country Status (3)

Country Link
US (1) US20080096701A1 (fr)
FR (1) FR2907343B1 (fr)
TW (1) TW200819563A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019185487A1 (fr) * 2018-03-26 2019-10-03 Bridon International Limited Corde en fibres synthétiques
WO2021166671A1 (fr) * 2020-02-19 2021-08-26 ヨネックス株式会社 Corde de raquette

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2729933A (en) * 1952-07-12 1956-01-10 Schlichter Jute Cordage Compan Twine
US3101522A (en) * 1960-12-01 1963-08-27 Hercules Powder Co Ltd Three-ply tweed yarn
US4155394A (en) * 1977-08-29 1979-05-22 The Goodyear Tire & Rubber Company Tire cord composite and pneumatic tire
US4297835A (en) * 1979-11-23 1981-11-03 Mituo Shimizu Synthetic strings
US4299884A (en) * 1979-01-10 1981-11-10 L. Payen & Cie Type of wrapped textile thread and process for its production which involves thermofusion to secure wrapping to core
US6460321B1 (en) * 1996-12-12 2002-10-08 Gosen Co., Ltd. Racquet string
US20030159768A1 (en) * 1999-09-08 2003-08-28 Jean-Francois Fritsch Hybrid cabled cord and a method to make it
US6775970B2 (en) * 2002-04-26 2004-08-17 Leobardo Paulino Fernandez Apparatus and method for making a hybrid cord
US20050160714A1 (en) * 2003-05-15 2005-07-28 Yves Delvael Synthetic cord for tennis racket

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2729933A (en) * 1952-07-12 1956-01-10 Schlichter Jute Cordage Compan Twine
US3101522A (en) * 1960-12-01 1963-08-27 Hercules Powder Co Ltd Three-ply tweed yarn
US4155394A (en) * 1977-08-29 1979-05-22 The Goodyear Tire & Rubber Company Tire cord composite and pneumatic tire
US4299884A (en) * 1979-01-10 1981-11-10 L. Payen & Cie Type of wrapped textile thread and process for its production which involves thermofusion to secure wrapping to core
US4297835A (en) * 1979-11-23 1981-11-03 Mituo Shimizu Synthetic strings
US6460321B1 (en) * 1996-12-12 2002-10-08 Gosen Co., Ltd. Racquet string
US20030159768A1 (en) * 1999-09-08 2003-08-28 Jean-Francois Fritsch Hybrid cabled cord and a method to make it
US6775970B2 (en) * 2002-04-26 2004-08-17 Leobardo Paulino Fernandez Apparatus and method for making a hybrid cord
US20050160714A1 (en) * 2003-05-15 2005-07-28 Yves Delvael Synthetic cord for tennis racket

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019185487A1 (fr) * 2018-03-26 2019-10-03 Bridon International Limited Corde en fibres synthétiques
US11352743B2 (en) 2018-03-26 2022-06-07 Bridon-Bekaert Ropes Group Synthetic fiber rope
WO2021166671A1 (fr) * 2020-02-19 2021-08-26 ヨネックス株式会社 Corde de raquette
JP7333039B2 (ja) 2020-02-19 2023-08-24 ヨネックス株式会社 ラケット用ストリング

Also Published As

Publication number Publication date
FR2907343B1 (fr) 2009-11-13
TW200819563A (en) 2008-05-01
FR2907343A1 (fr) 2008-04-25
TWI336737B (fr) 2011-02-01

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Legal Events

Date Code Title Description
AS Assignment

Owner name: YAO I FABRIC CO., LTD., TAIWAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WANG, TSAN-CHING;REEL/FRAME:019324/0958

Effective date: 20070103

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION