Construction liner for American football

Details Construction liner for American football Construction liner for American football

2006-03-28

2006-03-28

Wong, Steven (Department: 3711)

Games using tangible projectile

Projectile, per se; part thereof or accessory therefor

Having fluid-retaining bladder removable from within...

C473S599000

Reexamination Certificate

active

07018311

ABSTRACT:
A construction liner for sportsball, such as an American football, which is made by compressing and vulcanization a rubber piece with at least a fabric lining, is strong enough to produce a more durable American football with better supporting but lower manufacturing cost. The American football includes a ball cover having a valve hole thereon and an inflatable bladder disposed within the ball cover for propping up the ball cover after inflation. The inflatable bladder has a predetermined shape and a valve stem mounted thereon and extended through the valve hole of the ball cover. The ball cover includes four elliptical cover pieces sewn edge to edge together. Each of the cover pieces includes an outer elliptical cover skin and an inner elliptical construction liner which is overlappedly attached on an inside of the cover skin for supporting the cover skin and enclosing the inflatable bladder.

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