Molded ball with fins

Details Molded ball with fins Molded ball with fins

1998-06-22

2001-04-24

Wong, Steven (Department: 3711)

Games using tangible projectile

Projectile, per se; part thereof or accessory therefor

Having fluid-dynamic means other than stitched seam or...

C473S612000

Reexamination Certificate

active

06220980

ABSTRACT:

BACKGROUND AND SUMMARY OF THE INVENTION
It is well known that thermoplastic injection molding requires a part design limited to relatively thin walls (for rapid cooling in the mold) and having an overall geometry which permits release from the mold when the mold is opened. These requirements are inconsistent with the geometry of balls.
Currently balls are made by other manufacturing processes such as, rotational molding, blow molding or thermoset molding.
The present invention is a ball suited to injection molding from soft thermoplastic elastomer. In addition, the ball of the present invention can be made very soft and compressible.


REFERENCES:
patent: 115252 (1871-05-01), Spencer
patent: 3046016 (1962-07-01), Laws
patent: 4581299 (1986-04-01), Jager
patent: 5236196 (1993-08-01), Blankenburg et al.
patent: 5480143 (1996-01-01), McMurry
patent: 5800244 (1998-09-01), Barton, Jr.

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