Abstract A display device comprises a moisture-containing sheet of paperboard with films laminated to the opposite sides thereof. In predetermined areas the film on one side forms a moisture impervious layer while at those same areas the film on the opposite sides of the sheet is moisture pervious so that upon flexing and drying of the sheet and shrinkage of the fibers thereof, the sheet will warp in a direction in which the moisture impervious film is on the outside of a flexure of curvature. In other predetermined areas the films are moisture pervious and impervious, respectively, in a reverse fashion so that in those other areas the flexed sheet will warp in a direction opposite to the first-mentioned direction. Certain other areas may be embossed with reinforcement and made water impervious at both films to inhibit warpage. The foregoing are utilized to enhance the shape of a three-dimensional display in a programmed manner.
A display according to claim 1 having a series of small closely spaced embossings of a depth that are less than the thickness of the laminate and located at least at one of the regions to macerate the fibers of the paperboard and enhance the warpage thereat.
Claim 2
Dependent Claim
48 words
A display according to claim 1 having at least one embossing outside of said two regions, said embossing being of a depth that is greater than the thickness of a film and constituting a rigidifying structure for the display, and said films being water impervious at said embossing.
Claim 3
Dependent Claim
36 words
A display according to claim 1 in which the film at least at one of the moisture impervious portions comprises a layer of moisture pervious light-reflecting metallic foil that is covered with a water impervious coating.
Claim 4
Dependent Claim
198 words
An article of manufacture comprising a sheet of paperboard material of the kind that is subject to shrinkage upon drying, a film laminated to one surface of the sheet and being moisture impervious in one region and moisture-pervious in another region, a film laminated to the opposite surface of the sheet and being moisture impervious in the portion thereof opposite to and substantially coextensive with the said moisture pervious region and being moisture pervious in the portion thereof that is opposite to and coextensive with the first-mentioned moisture impervious portion, said laminate being sufficiently yielding to flex the sheet into areas of curvature with the moisture impervious film portions remaining unbroken and being on the outsides of the curves of flexure and with the flexing being of an amount such that the laminate does not return to its initial position, said moisture permeable regions constituting structures for controlling the drying of the sheet to accentuate the respective areas of curvature resulting from warpage of the sheet during drying thereof, and means comprising embossing outside of the two regions and forming a rigidifying structure for the laminate that resists warpage of the sheet in opposite directions in said embossing.
Claim 5
Dependent Claim
22 words
A structure according to claim 5 in which the laminate is moisture impervious at the sides thereof that are at the embossing.