It is common to provide certain containers, intended to contain non-consumable products at one time, an overcap that protects its contents until full employment.

In the following drawing we present a possible design of this type of overcaps.

It is characterized by pressure adjustment on the double closing of the metal lid, therefore it is elastic, it is made of polyethylene, and its shape allows the stackability, ie on it the bottom of another container is perfectly adjusted.

The measurements in height of this overcap, which are valid for any diameter, are delimited on the drawing. On the contrary, the values ​​of the different diameters of the same, are related to the external diameter of the double closing of the cover to which it covers.

The following table shows the orientative formulas for the determination of each of them:

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