Mocon, Inc.

Michelle T Stevens

Daniel W Mayer

Timothy A Ascheman

A method for validating permeation measurements through closed containers including closure members, by making a first measurement of permeation through a container of a first size, and making a second measurement of permeation through a container of a second size, both with the same closure members, and subtracting the permeation measurement contributions respectively made by the closure members.

Validation process for permeation measurements through closed containers

A gravimetric cup for containing a liquid sample to be measured for moisture or vapor transmission loss therefrom, such gravimetric cup having a lower cup body and a cover, the cover having an outer edge rim alignable with an upper edge rim of the cup for mounting a film membrane thereacross, and the cover having radial, upwardly curved ribs extending between the outer edge rim and a center hub region so as to provide an evenly distributed clamping force upon the membrane. The cup body has a pair of upwardly projecting posts, each having an engagement channel. A clamping bar has slotted ends for engaging against the respective post engagement channels, and a center threaded hole for receiving the threaded shank of a tightening knob that applies downward force to the cover.

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Minneapolis, MN, United States of America

Michelle T Stevens