Measuring and testing – Gas analysis – Moisture content or vapor pressure
Patent
1991-05-09
1993-07-06
Williams, Hezron E.
Measuring and testing
Gas analysis
Moisture content or vapor pressure
73 2904, G01W 100
Patent
active
052243737
ABSTRACT:
A thin flexible humidity sensor and indicator of sandwich construction sealably mounted in an opening in the wall of a container provides a visual indication of the humidity within the container. The humidity sensor and indicator has an intermediate layer of flexible humidity sensitive material chemically treated to change color corresponding to exposure to predetermined levels of humidity, a thin flexible layer of transparent water vapor barrier material on one side, and a thin flexible layer of water vapor permeable material on its opposite side which are sealed together and sealably secured over the opening in the container wall. The water vapor permeable layer is disposed on the interior of the container and provides communication between the container interior and the humidity sensitive layer and the transparent water vapor barrier layer and the humidity sensitive layer are visible from the exterior of the container to provide a visual indication of the value of the humidity within the container. In a preferred embodiment, the humidity sensitive vehicle is a sheet of blotter paper treated with a chemical solution of cobalt chloride and additives and the water vapor permeable material is flash spun, film fibril high density polyethylene material which prevents lint and debris from the blotter paper from entering the interior of the container and prevents direct contact between the chemically treated blotter paper and the contents of the container.
REFERENCES:
patent: 2249867 (1941-07-01), Snelling
patent: 2716338 (1955-08-01), Blinn
patent: 2815662 (1957-12-01), Thomas
patent: 2934954 (1960-05-01), Phillips
patent: 3425388 (1969-02-01), West
patent: 4034609 (1977-07-01), Fuller
patent: 4150570 (1979-04-01), Fuller
Williams Christi A.
Williams Joseph M.
Roddy Kenneth A.
Roskos Joseph W.
Williams Hezron E.
LandOfFree
Flexible humidity indicator and container does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Flexible humidity indicator and container, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flexible humidity indicator and container will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1682889