Method of making a composite racket
OwnerWalter Sheninventor
Life of this patent
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Abstract
A composite racket having at least one portion made of a thermoplastic resin and having the remaining portion made of a thermosetting resin is disclosed. The thermoplastic and thermosetting resins provide different dynamic stiffness, flexibility and toughness so that the racket possesses desired characteristics in the zones where they are necessary. The racket is fabricated by preforming a fiber reinforced thermoplastic resin in a first mold to form one of the frame portions and placing this preformed portion in a second mold. A fiber reinforced thermosetting resin is then formed into the other frame portion in the second mold and joined to the frame portion formed using thermoplastic resin at the throat section of the racket.
Claims4
The method of making a composite racket frame having a shaft defining a first frame position, a head defining a second frame portion, a throat section disposed between and through which said first and second portions are connected together and wherein one of said frame portions consists of fiber reinforced thermoplastic resin and the other of said frame portion consists of a fiber reinforced thermosetting resin;
- the method comprising the steps of:
- a) preforming said fiber reinforced thermoplastic resin in a first mold to form one of said frame portions;
- b) placing the preformed one frame portion in a second mold;
- and
- c) forming the fiber reinforced thermosetting resin into said other frame portion in said second mold and integrally joining it at said throat section to said first frame portion to form said racket frame.
Dependencies are inferred from the claim text.