Tennis racket manufacture

Details Tennis racket manufacture Tennis racket manufacture

1977-08-25

1980-01-15

Ball, Michael W.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156171, 156172, 156188, 156191, 156245, 264137, 264258, 264313, 264314, B65H 8100, A63B 4910

Patent

active

041837762

ABSTRACT:
A tennis racket frame is constructed primarily of an elongated hollow tube member having a wall thereof consisting essentially of a plurality of concentric layers of high tensile strength fibers impregnated and bonded together by binder resin, at least two of the layers being helical windings of opposite unidirectional hands, and the head portion of a racket frame having a groove molded therein to receive the loop portions of the strings in recessed relation to the surrounding surface areas of the frame. The frames are made by a method including the use of a special mandrel on which the layers of fiber are wound under controlled conditions providing extra material in the head portion which is formed into the wall of the grooved portion of the head without affecting the overall sectional dimensions of the frame.

REFERENCES:
patent: 2573361 (1951-10-01), Rodgers, Jr. et al.
patent: 3483055 (1969-12-01), Eshbaugh
patent: 3755037 (1973-08-01), Erwin et al.
patent: 3810803 (1974-05-01), Karp et al.
patent: 3993308 (1976-11-01), Jenks

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