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Strings of sport rackets and method for making the sameStrings of sport rackets and method for making the same description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080096701, Strings of sport rackets and method for making the same. Brief Patent Description - Full Patent Description - Patent Application Claims
FIELD OF THE INVENTION [0001]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. BACKGROUND OF THE INVENTION [0002]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. Generally, the higher resilient factor the strings have, the better that the ball can be hit back. The conventional strings are made by Nylon, artificial fibers, catgut, or semi-catgut, wherein the artificial fibers are most welcomed for the strings. [0003]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. As shown in FIG. 9, the conventional method for making the strings for sport rackets includes steps of extruding, acid-washing and twining. There are two different extruders for 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. [0004]However, there are too many machine involved for making the string, at least two extruders, one acid-washing machine and a twining machine are needed. In other words, the conventional strings are made at a high manufacturing cost, and the chemical acid material has environmental concerns. [0005]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. SUMMARY OF THE INVENTION [0006]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. [0007]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. [0008]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. [0009]The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention. BRIEF DESCRIPTION OF THE DRAWINGS [0010]FIG. 1 shows the two steps of the method of the present invention; [0011]FIG. 2 shows the arrangement of the machine for making the string of the present invention; [0012]FIG. 3 is a cross sectional view to show the string of the present invention; [0013]FIG. 4 is a cross sectional view to show another embodiment the string of the present invention; [0014]FIG. 5 is a cross sectional view to show yet another embodiment of the string of the present invention; [0015]FIG. 6 is a cross sectional view to show yet another embodiment of the string of the present invention; [0016]FIG. 7 is a cross sectional view to show yet another embodiment of the string of the present invention; [0017]FIG. 8 is a cross sectional view to show yet another embodiment the string of the present invention, and [0018]FIG. 9 shows steps of a conventional method for making a string of sport rackets. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT [0019]Referring to FIG. 1, the method for making strings of the present invention for sport rackets comprises the following steps: Continue reading about Strings of sport rackets and method for making the same... Full patent description for Strings of sport rackets and method for making the same Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Strings of sport rackets and method for making the same patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Strings of sport rackets and method for making the same or other areas of interest. ### Previous Patent Application: Cover for the shaft of a lacrosse stick Next Patent Application: Arrow launched media reservoir Industry Class: Games using tangible projectile ### FreshPatents.com Support Thank you for viewing the Strings of sport rackets and method for making the same patent info. IP-related news and info Results in 0.39579 seconds Other interesting Feshpatents.com categories: Electronics: Semiconductor , Audio , Illumination , Connectors , Crypto , 174 |
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