Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1980-01-15
1981-04-28
Ball, Michael W.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156245, 156253, 264258, 264304, 273 73F, B65H 8100, A63B 4910
Patent
active
042643899
ABSTRACT:
A tennis racket frame is constructed primarily of an elongated tubular member having a wall thereof consisting of a plurality of concentric layers of high tensile strength fibers impregnated and bonded together by binder resin to produce a hollow cored tennis racket. The method includes forming a plurality of string holes in the head portion of the racket, during or prior to the molding operation. The holes are formed by separating the fibers around the location of the hole by passing pointed penetrating tools through the frame in the area which will form the head portion thereof, and either retaining the tool in position in the holes during molding, or replacing the tools with positioning pins or grommets prior to the molding operation. If the pins are utilized they may be removed after molding of the racket is complete, and if grommets are utilized they become integrally attached to the racket and provide additional support for the strings.
REFERENCES:
patent: 3483055 (1969-12-01), Eshbaugh
patent: 3755037 (1973-08-01), Erwin et al.
patent: 3930920 (1976-01-01), Kicheren
patent: 3993308 (1976-11-01), Jenks
patent: 4128963 (1978-12-01), Dano
patent: 4183776 (1980-01-01), Staub et al.
Erwin John R.
Staub Anthony F.
Staub Norman T.
Ball Michael W.
Starwin Industries, Inc.
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