DE2651659A1 - Tennis-racket strings coated in foam plastic or rubber - have roughened surfaces - Google Patents

Abstract

Core strings of gut, plastic, thread or wire are given >=1 coatings by dipping them in soft plastic, pref. foamed synthetic resin, or natural or synthetic rubber, pref. foamed rubber. The coated strings may be given an irregular surface either by roughening the surface of the coating before it has fully dried, or by fastening a rough plastic, rubber or textile woven cloth round the core string with an adhesive. The plastic used is pref. foamed urea-formaldehyde resin or polystyrene. Alternatively, a gut or wire string may be given a protective coating of soft plastic, pref. superpolyamide.

Description

"Process for the production of coated tennis strings"

There are tennis rackets known whose stringing through in the middle Knots created with thin strings are made slack and rough. on in this way there is a delay effect when hitting the ball the flight of the ball causes changing spin. The ones with such tension beaten 3 balls have a strong forward spin.

They are so overwhelmed that they are uncontrollable on the side of the opponent fall down with a long delay and then almost vertically jump up. They can hardly be calculated and are therefore very difficult to get right0 It is therefore not surprising if r8 is also used for weaker players suddenly succeeds in defeating much stronger opponents against whom you have so far hardly had a chance.

Such coverings, however, have considerable disadvantages.

Their price is also due to the mostly hand-woven knots unusually high, in addition, such strings have a relatively high ball wear As a result and last but not least, almost all players get equipped with this Play tennis rackets, usually the dreaded ones after a relatively short time "Tennis elbow", a painful injury to the forearm, and often beyond also Chorn injuries to the joints and muscles.

The present invention has now avoided these disadvantages made a task.

A method of making coated tennis sat has been developed found, with core strings made of gut, plastics, cord or wire one or more layers of soft plastics, preferably in the dipping process foamed synthetic resins, made of natural or artificial rubber, preferably foam rubber, be applied.

The layers applied to the core strings can also be used with bump-like, brush-like or pin-like, rough elevations that are in the soft, not yet fully hardened material used as a coating is embossed or poured onto them will.

Instead of the layers applied in the immersion process, the Core strings also made of plastics, rubber or textiles, rough to threads carrying pointed elevations are woven around them and these on the surface of the Zaiten be fixed with suitable adhesives.

Wines are preferred for the use of foamed synthetic resins Carbamide or urea-formaldehyde resins as well as ploystyrene are suitable as benders proven.

With the so produced, applied in the dipping process or by weaving, preferably any elevations bearing layers, it is not only possible to bring about various effects when hitting the ball and often today to achieve "top spin" brought about by strong players, but at the same time even hard hit balls of the opponent without any problems due to the type of covering hit back, the ball strong through the strings used according to the invention is braked and at the same time it succeeds him in an almost dead "stop-ball" or to transform it into a high, backward-jumping "lob".

Is now used for such strings instead of gut or synthetic strings Wire, as the core string, related and this with preferably again the aforementioned Covered with fabrics that support elevations, you can do two things with it. Once the aforementioned effects, then it's just for: attacking players or is important for those SpielXer who prefer a fast game the wire used as the core string, also possible, with such coverings also to hit very hard, which is bearing the knots mentioned in the singangs Covering is not possible. The possible variations are therefore available to players who play such tennis rackets equipped with layered strings, especially large and the tennis game practiced with it is placed on a completely new basis.

Such strings are also suitable for use in "badminton" hits quite interesting, thereby changing this game and what the required for it Force expenditure can be simplified considerably.

However, the use of such strings is particularly important in view of this on the ### #### the knots carrying coverings because with the invention manufactured strings or the rackets strung with it hardly Injuries can occur, yes, because these are almost completely avoided the players no longer, with all efforts and with constant, unnatural strain on muscles, joints, arm int shoulder, on the balls "Threschen" museums in order to achieve the desired effect.

It was further found that strings made of gut or wire to protect against moisture or to improve elasticity in the immersion process soft plastics, preferably super polyamide, are coated.

The strings obtained in this way are particularly durable, and nan Hit extremely hard with such coverings, without sacrificing the necessary Having to do without elasticity. Such strings are not only more durable than the well-known strings, but you can also play considerably with these improve and make it much faster and more tricky.

Example 1 A 1 mm diameter tennis string made of gut, Plastic or wire is gradually replaced by a latex solution Bath is drawn, whereupon the somewhat soft layer obtained in this way is then applied - the strings are now about twice the diameter - continuously a wheel mechanism or a pulling or hammer-like tool can act.

This creates on the surface of the strings, after cooling, hump-like elevations. The tennis racket is now strung with the the upholstery feels rough through the pointed elevations, and you get the Playing with a racket equipped in this way gives you a completely new feel. One can at the same time achieve surprising effects. Once through the at Hitting the racket with the ball somewhat yielding.

Stringing even extremely hard balls hit by the opponent, without any difficulties with a particular one, depending on the type of stroke used, constantly changing effe # t be fought back.

Once the string brakes the incoming ball, then it slows down again due to the elevations on the surface of the strings, additional, manifold ones Achieves effects that can easily be played by playing "stop balls", "top spins" and allow "lobs" to jump backwards.

Example 2 Wire is described in the same way as in Example 1), goose gradually sucked through a solution consisting of e.g. super polyamide. on in this way a layer is formed after hardening and this now consists of a wire core and a layered string made of plastic is indefinitely durable and also Resistant to weather influences.

Compared to the well-known synthetic strings on the market Layered strings of this type have the great advantage that you can play with rackets in this way # can hit much harder without compromising on a certain and desirable elasticity, which stems from the soft plastic used as a coating, to have to do without.

Claims (4)

Claims method for the production of coated tennis strings, characterized in that it consists of gut, plastics, cord or wire Core strings in the dipping process one or more layers of soft plastics, preferably foamed synthetic resins, made of natural or artificial rubber, preferably Foam rubber. 2) Method according to claim 1), characterized in that the on the core strings are additionally applied with a hump-like brush or pen-like layer, rough elevations are provided, which into the soft, not yet fully hardened, As a coating related materials are embossed or poured onto them. 3) Method according to claim 1) and 2), characterized in that the core strings made of plastics, rubber or textiles, rough to threads carrying pointed elevations are woven around them and glue on the surface be determined. 4) Method according to claim 1) to 3), characterized in that foamed Synthetic resins, preferably carbamide or urea-formaldehyde resins or polystyrene are used, 5) method according to claim 1), characterized in that from Bar or wire existing strings to protect against moisture or for better Elasticity in the immersion process with soft plastics, preferably super polyamide, be coated.