Ball Canning Lids Why Do Tennis Ball Cans Have Lids?

Why do tennis ball cans have lids? - ball canning lids

For the same reason your can of beans has the eyelids. In order to remain tightly closed, so that they open up fresh for you the first time. They have blown up three new balls into the (new) and closed strongly with the metal part of the cover (diffuse May), in his words. Now the air can not leave the balls and the air can enter the balls can be kept clean and not by natural elements like air and water. You will notice that the boxes not much pressure in them. Enough pressure that the plastic cover is not. Some fields may need on the shelf for an extended period and have to travel long distances to reach their tennis.

maybe the cans are swollen, so that when they are promoted, because you can not just destroy, protects the ball is struck or crushed and you should know that every time a tennis ball touches or bounces on the ground that a little air has. hold back on the air in the box, puts it against the inside walls of the box should be maintained, and we can not do it with a lid, whichs closed.

May be the main reason for the upper back to keep the pressure in the box, but not cool, but you can also use the plastic cap, throw the box in the air and boom, you can .. . . ! what we have is a great warm-up exercise "to the three fly balls in the air react and catch it as soon as possible"