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US 4,036,360 AGranted
Package having dessicant composition
AssigneeGraham Magnetics Incorporated
InventorRobert J. Deffeyes
Life of this patent
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AssigneeGraham Magnetics Incorporated
InventorRobert J. Deffeyes
Estimating the term…
A package comprising a dessicant material consisting essentially of 1 a dessicant and 2 tough, film-forming, resin having a high moisture vapor transmission rate. A prepolymerized polyurethane is particularly useful. The material is of particular value as a package insert - e.g. with film or cameras or as a coating material which can be utilized on equipment to be protected or, most advantageously, on the interior walls of packaging boxes and the like.
A dessicant composition of the type adapted to absorb moisture in packing applications comprising
Dependencies are inferred from the claim text.
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With provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents ; Applications of corrosion…
Stock material or miscellaneous articles: material designed to be responsive to temperature, light, moisture
Composite having voids in a component [e.g., porous, cellular, etc.]: void-containing component contains also a solid fiber or solid particle
Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles:…
Term ended 19 Jul 1994 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
This invention relates to packages comprising a novel dessicant composition.
Most people are familiar with the small bags or capsules of dessicant, often of silica gel or moisture absorbing inorganic salts, which are used in packages of pharmaceuticals, precision instruments such as cameras, or other items which require protection from moisture.
It is desirable to provide a less expensive or more convenient means for achieving the protection of the contents of these packages. Moreover, it is desirable to provide a type of dessicant that can be tailored not to respond to rapid, temporary increases in moisture handling and before placement in the package. Such response unnecessarily uses up the water-retaining capacity of the dessicant or, more realistically, requires that it be given special handling before dispensing into the package to be protected.
FIG. 1 is a schematic diagram of the crossection of a tape 10 comprising coating 12 formulated according to the invention, in this case mounted on a mylar-support sheet 14.
FIG. 2 is perspective view of schematic diagram of a package 16 comprising an interior coating 18 of the dessicant composition.
FIG. 3 is a section of a package 20, a can, showing a plug 22 of dessicant mounted in a package.