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US 4,047,422 AGranted
Process for measuring permeability to gas of walls and/or closure of three-dimensional encasing elements
OwnerGeorges H. Lyssyinventor
Life of this patent
Estimating the term…
Abstract
A filled or gas encasing element to be tested is placed in a measuring chamber. The free space between the element and the chamber is filled with filler elements to prevent bursting or inflation of the element. A vacuum is produced in the chamber, and the time required to achieve a predetermined pressure increase therein is measured.
Claims3
A process for measuring the permeability to gas of the walls and/or the closure of three-dimensional encasing elements, such as packages, bottles or cans, in accordance with a manometric measuring method, said process comprising:
- placing a filled or gas encasing element which is to be tested into a measuring chamber;
- filling the free space between said encasing element and the inner wall of said measuring chamber with filler elements that protect the encasing element against bursting or inflation;
- producing a vacuum in said measuring chamber;
- and
- measuring the time within which a certain pressure increase within said measuring chamber occurs, such time representing a criterion for the leakage rate of the encasing element and/or its closure.
2 more elements
Dependencies are inferred from the claim text.