Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1983-06-13
1987-02-17
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264148, 264156, 264211, 264285, 273 73C, B29C 6722, B29C 3910, B29C 4700, B29C 5308
Patent
active
046438572
ABSTRACT:
A racket frame is formed from an elongate element produced by extrusion of a mixture of a thermoplastic material and carbon fibres. The element is bent while hot to form the racket head and has arms which are joined together by throat pieces, thereby forming the racket shaft. The throat pieces are formed by injection moulding. The elongate element preferably has at least one cavity extending along its length, the cavity being filled with foamed material of a density different from that of the elongate element so that the racket can have the desired weight. Preferably ropes of carbon fibres are included in the elongate element extending along its length. The aligned fibres give strength to the frame. In production of the frame the thermoplastic material may be extruded, cooled, have holes for strings formed in it, and then bent to shape or may be bent to shape immediately upon extrusion.
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Brydson, J. A., Plastics Materials, Princeton, N.J., D. Van Nostrand, .COPYRGT.1966, pp. 296-298, 307, 308.
Hackh's Chemical Dictionary, fourth edition, completely revised and edited by Julius Grant, New York, McGraw-Hill, .COPYRGT.1972, p. 467.
Cousin Jean-Claude
Robin Jacques A.
Anderson Philip
Shoup Guy W.
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