| 摘要 |
A fiber reinforced racket frame advantageously usable for tennis rackets includes a discontinuous foamed resin core made up of a plurality of core pieces longitudinally aligned in end-to-end relationship which preferably vary in the transverse cross-sectional characteristic and/or density from piece to piece. Longitudinal discontinuity and, preferably, change in at least one of the transverse cross-sectional characteristics and density effectively hinder direct and smooth transmission to players' hands of the impact imposed on the playing face of the racket. The manufacturing process is greatly simplified so as to fit automatization and mass-production.
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