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Publication numberUS3920658 A
Publication typeGrant
Publication dateNov 18, 1975
Filing dateNov 23, 1973
Priority dateJan 20, 1972
Publication numberUS 3920658 A, US 3920658A, US-A-3920658, US3920658 A, US3920658A
InventorsBenson Martin James
Original AssigneeBenson Martin James
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Coated tennis string and process for coating
US 3920658 A
Abstract
A tennis string of gut, nylon, or polyester is coated with skid-proof material to obtain a superior string capable of imparting more spin to a tennis ball with less effort by the player.
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Claims  available in
Description  (OCR text may contain errors)

United States Patent [191 Benson Nov. 18, 1975 COATED TENNIS STRING AND PROCESS FOR COATING [76] lnventor: Martin James Benson, 4107 N.

Spaulding Ave., Chicago, 111. 60618 [22] Filed: Nov. 23, 1973 [21] App1. No.: 418,432

Related US. Application Data [63] Continuation-in-part of Ser. No. 219,580, Jan. 20,

1972, abandoned.

[56] References Cited UNITED STATES PATENTS 328,004 10/1885 Church ..51/404X 1,279,718 9/1918 Lewis 117/141 2,401,291 5/1946 Smith 57/153 X 3,120,144 2/1964 Bayer 84/297 S X 3,330,689 7/1967 117/92 X 3,738,096 6/1973 Crandall 57/140 C X FOREIGN PATENTS OR APPLICATIONS 1,101,384 l/1968 United Kingdom 57/153 Primary Examiner-Ralph Husack [57] ABSTRACT A tennis string of gut, nylon, or polyester is coated with skid-proof material to obtain a superior string capable of imparting more spin to a tennis ball with less effort by the player.

4 Claims, No Drawings COATED TENNIS STRING AND PROCESS FOR COATING DESCRIPTION This application is a continuation-in-part of copending application, Ser. No. 2l9,580filed Jan. 20, 1972, now abandoned.

The invention relates to tennis strings. It is an object of the present invention to provide a superior tennis string, possessing essentially the elastic properties of gut, nylon, or polyester, but which has greater friction against the ball, imparting to it greater'spin with less effort. A further object is to provide a tennis string of gut which not only has good elastic properties, but is unaffected by moisture.

ln the past, attempts have been made to string tennis racquets with wire, with solid rubber strings, and with wire coated with rubber. None of these attempts have met with any-degree of popular success, because of the poor elastic and mechanical qualities of such stringing, and all have long since been abandoned.

At the present time, gut strings are generally considered superior to all others by knowledgable tennis players, and give the best performance on the tennis court. Gut strings provide the best blend of power and control, due to their particular elastic properties.

Nylon strings are also commonly and widely used. They give satisfactory performance, and are cheaper than gut and impervious to moisture. A more recent development is polyester strings, which have been shown to be quite satisfactory, and are rapidly gaining acceptance.

However, one disadvantage of gut, nylon, and polyester strings is that all are inherently slippery and, consequently, inefiicient in imparting spin to a tennis ball. Gut has the further disadvantage of being sensitive to moisture.

To the end of overcoming these disadvantages of conventional strings, my invention has been contrived.

The invention, then, is a tennis string composed of gut, nylon, or polyester which has a thin, durable coating of skid-proof rubber, or other skid-proofing coating."lt is, of course, to be understood that the coating can be applied either before or after stringing the racquet.

2 The coating may be of nearly any soft, durable, elastomeric material, e.g., natural or synthetic rubber, urethane rubber, high-density urethane foam, polyvinyl chloride, etc. I prefer to employ a soft, one component, room temperature curing urethane rubber for the coating.

An alternative type of coating could be made by including a granular substance, such as fine silica sand, in a coating material which is not inherently skid-proof, such as an alkyd, or an acrylic. The granular material gives the cured coating a rough surface which is skidproof.

In the most valuable embodiment of my invention, the coatings are intended to be quite thin, thus assuring that the resulting strings have essentially the same elastic properties as strings-entirely composed of gut or nylon or polyester, which properties have been shown to be superior for tennis strings. The skid-proof coating, however, makes these strings more effective in imparting spin to the ball than conventional strings.

A further advantage of the invention is that a rubber coated gut string will be completely impervious to moisture. Yet another advantage is improved abrasion resistance.

As a further improvement to my invention, these rubber coated strings, as described above, can be given a further coating of wax, for ease in stringing a racquet.

Having thus described the invention, what is claimed as new is:

l. A tennis string of gut, nylon, or polyester, which is coated with a. coating resin containing sufficient fine, granular material to significantly increase the friction of string against ball.

2. A process for increasing the effectiveness of a tennis string in imparting spin to a tennis ball comprising applying a soft, skid-proof, elastomeric material, or a coating resin containing sufficient fine, granular material to significantly increase the friction of the string against the ball, to the string after the racquet is strung.

3. The process of claim 2, wherein the skid-proof coating is a soft, elastomeric material.

4. The process of claim 2, wherein the skid-proof coating is a coating. resin containing sufficient fine, granular material to significantly increase the friction of the string against the ball.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US328004 *Aug 8, 1884Oct 13, 1885 Polishing or emery cord
US1279718 *Nov 3, 1916Sep 24, 1918Seneca G LewisRubber-coated cord.
US2401291 *Jun 11, 1943May 28, 1946Du PontRacket string
US3120144 *Jul 15, 1959Feb 4, 1964Willi BayerString and process for its manufacture
US3330689 *Jun 20, 1963Jul 11, 1967Deering Milliken Res CorpLatex coated fibrous material and method of making same
US3738096 *Nov 9, 1970Jun 12, 1973Ashaway Line & Twine MfgManufacture and construction of strings
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4238262 *Jul 26, 1978Dec 9, 1980Fishel Clark WApplying particles and adhesive to racquet strings
US4377620 *Jun 21, 1982Mar 22, 1983Edward AlexanderGut for tennis racket and the like and method of making same
US4391088 *Jan 13, 1982Jul 5, 1983United States Tennis Gut Association, Inc.String for sports rackets
US4449353 *Aug 6, 1982May 22, 1984United States Tennis Gut Association, Inc.Gut string for sports rackets
US4586708 *Mar 5, 1985May 6, 1986Imperial Chemical Industries PlcSports racket strings of a synthetic thermoplastic polymeric material
US5327714 *Jul 30, 1992Jul 12, 1994Prince Manufacturing, Inc.Synthetic string for sporting application
US5376412 *Nov 26, 1991Dec 27, 1994Regnault Reynolds S.A.Forming thread from discontinuous fibers with specified properties, impregnating with resin, coating with synthetic material to form sheath, crosslinking, adjusting thickness
US5570883 *Jun 21, 1995Nov 5, 1996Csabai; Julius S.Sport racket with string stabilization and friction coating
US5601762 *Dec 14, 1993Feb 11, 1997Ferrari Importing CompanyMethod for enhancing the properties of a string used in a stringing device
US8084084 *Apr 8, 2008Dec 27, 2011Suermeci BuenyaminProduct for roughening the strings of tennis, badminton and squash rackets and for keeping them rough and method for producing said product
EP0049196A1 *Sep 24, 1981Apr 7, 1982Cousin Freres S.A.Strings of synthetic materials for tennis rackets
EP0086285A1 *Feb 10, 1982Aug 24, 1983Gosen Co., Ltd.Improvements in and relating to racket strings
WO2008122141A1 *Apr 8, 2008Oct 16, 2008Buenyamin SuermeciProduct for roughening the strings of tennis, badminton and squash rackets and for keeping them rough and method for producing said product
Classifications
U.S. Classification428/395, 427/401, 427/416, 427/171, 428/390, 428/375, 427/407.1
International ClassificationA63B51/00, A63B51/02
Cooperative ClassificationA63B51/02
European ClassificationA63B51/02