Introduction


　「Felt though it is still clean,
　　Pressure of the tennis ball falls to natural・・・」

　I want to somehow,I had always thought。
　　　　「It might be somehow if there is a small pressure vessel」
　I thought、
　Since pretty good if I try to make to try、
I have decided to publish the method of fabrication


　If you use a lot, there is still pressure
 　Please refer to the photograph below (left:new, right:old) ball

Features of the tennis ball pressure vessel

　●Pressure vessel will prevent the escape of air tennis ball.
　　Pressure of the ball is good always, 　　Felt the ball until reduced, you can use the tennis ball.
　　Long period of time, you can use the tennis ball.
　　Surely, the cost of the ball is reduced significantly.

　●Ball will contain three or four in the container.

　●You can carry because it is light and compact.
　　Weight：　Container[ g]＋Ball[ g]＋air pump[ g]＝[ g]
　　Size：Diameter　８.５ｃｍ　Length　３４ｃｍ

　●You can see the contents because it is transparent container
　　You can see what piece or put the ball.

　●Pressure can be adjusted in the air pump.
　　Such as the cold season, you are may be set to increase the pressure of the container。
　　You can use a tire gauge, to measure the pressure of the pressure vessel。

Here it is: When you have completed

Let's make the pressure of the pressure vessel！

ballkeeper







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