Games using tangible projectile – Player held and powered – nonmechanical projector – per se,... – Racket or paddle; accessory therefor
Patent
1996-04-10
1997-12-23
Chiu, Raleigh W.
Games using tangible projectile
Player held and powered, nonmechanical projector, per se,...
Racket or paddle; accessory therefor
273DIG22, 273DIG23, 428375, A63B 4910
Patent
active
057002100
ABSTRACT:
A racket frame, which has a frame main body 12 made of a fiber reinforced plastic, an ionomer film 13 covering the frame main body 12, and a coating film 15 formed over the ionomer film 13, is provided with a gas permeable porous material film 14 interposed between the ionomer film 13 and the coating film 15 so as to reduce voids inside the frame main body 12 and between the frame main body 12 and the ionomer film 13. Since voids are reduced inside the frame main body 12 and between the frame main body 12 and the ionomer film 13, and since the ionomer film 13 is reinforced with the gas permeable porous material film 14, the racket frame has an excellent mechanical strength. Adhesion between the frame main body 12 and the ionomer film 13 is excellent. Adhesion between the gas permeable porous material film 14 and the coating film 15 is good.
REFERENCES:
patent: 3910578 (1975-10-01), Brine, Jr.
patent: 4283050 (1981-08-01), Nagamoto
patent: 4357013 (1982-11-01), Fernandez et al.
patent: 4360202 (1982-11-01), Lo
patent: 5322249 (1994-06-01), You
patent: 5482774 (1996-01-01), Miyamoto et al.
Ishigaki Yasuhiro
Kojo Hitomi
Takechi Kenjiro
Chiu Raleigh W.
Yamaha Corporation
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