Method of making game racket frame

Details Method of making game racket frame Method of making game racket frame

1992-07-16

1993-06-22

Gorski, Joseph M.

Metal working

Method of mechanical manufacture

Combined manufacture including applying or shaping of fluent...

264254, 273 73R, 273 73C, 273 73H, A63B 4904

Patent

active

052207196

ABSTRACT:
A method of making a game racket frame comprises the use of a tubular body of aluminum alloy consistent with a shape of a racket frame. An annular recess is provided respectively at the mid-point of the left-hand half of the head frame and at the mid-point of the right-hand half of the head frame. The annular recess is coated with adhesive resin. The tubular body is placed in a molding tool comprising a mold cavity having an annular ring which is located at a position corresponding to the annular recess of the tubular body and which has a shape corresponding to that of the annular recess of the tubular body and a size slightly larger than that of the annular recess of the tubular body. The molten plastic material is injected into the mold cavity under pressure and heat. Upon completion of the curing of the plastic material, the racket frame is removed from the molding tool. The racket frame so made is provided with weight-balancing pieces fastened securely to the head frame of the racket.

REFERENCES:
patent: 4052499 (1977-10-01), Goupil et al.
patent: 4998337 (1991-03-01), Tiekink
patent: 5054780 (1991-10-01), Chen
patent: 5100136 (1992-03-01), Chen

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