Patent ID: 6009743
Filing Date: 2000-01-04
Classification: G01N

Abstract:
An apparatus for monitoring the transmission rate characteristics of a permeant through a film material passing along a linear path of travel in sheet form at a relatively constant and predetermined rate of travel, comprising:a) a first chamber enclosing a predetermined length of said path of travel, said first chamber having an inlet opening to receive film sheet material passing along said path of travel at a linear rate of travel, and having an outlet opening to permit the exit of film sheet material from said first chamber;b) means for conveying a permeant into said first chamber;c) a second chamber downstream of said first chamber, said second chamber having an inlet opening to receive film sheet material passing along said path of travel, and having an outlet opening to permit the exit of film sheet material from said second chamber;d) means for conveying permeant outgassed from said film sheet material, while said film sheet material passes through said second chamber, to an exit conduit in said second chamber;e) a permeant detector connected to said exit conduit, for detecting an amount of permeant outgassed in said second chamber, and for producing a signal responsive to said detected amount; andf) means for quantifying said signal and providing an indicator of the permeant transmission characteristics of said film sheet material.