Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1984-04-27
1986-09-30
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 469, 264103, 264285, 264DIG66, 273 73D, 273 73F, B29C 6722, B29C 5336, B29C 5356
Patent
active
046146261
ABSTRACT:
A tennis racquet frame is fabricated of graphite and has tubing member for receiving the strings internally molded in the frame so that the strings do not penetrate the outside rim of the frame. This end result is achieved by preforming pieces of plastic tubing in an elongated mold, the mold shaping these tubing pieces into optimum radii for receiving the stringing. The mold is filled with plastic and the elongated strip thus formed removed from the mold and placed into a second mold which has a pair of wires installed there in and running along the longitudinal extent thereof. Plastic foam is then placed in the second mold to form a foam core which retains the wires along the back thereof with the ends of the wires protruding from the foam. The foam core strip is then removed from the mold and while being held at its ends by means of the wires is rotated to wind graphite fibers therearound, along the entire length of the core. The graphite wound core is then molded in conventional fashion to form the frame.
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Anderson Philip
Sokolski Edward A.
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