Card – picture – or sign exhibiting – Illuminated sign – Lamp box
Patent
1991-12-30
1993-06-01
Brittain, James R.
Card, picture, or sign exhibiting
Illuminated sign
Lamp box
40580, 40595, G09F 1306
Patent
active
052148700
ABSTRACT:
An illuminated sign assembly is provided, of the type that includes illuminated alphanumeric characters lying on a dark background, wherein the characters and/or color can be readily changed at low cost. The sign includes a thick rigid structural plate (26, FIG. 3) of colorless translucent material which can be readily placed in a lightbox that shines light through the plate. A thin color sheet (30) which passes light of a selected color, lies on the front face of the translucent plate, and an opaque character sheet (34) which has apertures (20) defining alphanumeric characters, lies on the front face of the color sheet. The color and character sheets are each thin, so new color and character sheets can be provided at low cost for mounting on the plate. The color and character sheets each have a layer of water-soluble adhesive so a water spray (62, FIG. 11) can be applied to greatly reduce the adhesive viscosity to enable squeegeeing (at Z) of each sheet to remove air bubbles. Characters are cut from the front face of the character sheet (34, FIG. 7 ) while a backing (72) lies over an adhesive layer on the back face of the character sheet. After character areas are removed, a holder sheet (76) is adhered to the front face of the character sheet, and the backing sheet is then removed. After the character sheet is applied facewise on the color sheet, the holder sheet (76) is removed.
REFERENCES:
patent: 1464228 (1921-12-01), Van Bloem
patent: 1857882 (1930-08-01), Shipman
patent: 1888584 (1932-11-01), Codieux
patent: 2622356 (1952-12-01), Valente
patent: 2689422 (1954-09-01), Hoff
patent: 2707346 (1952-09-01), Fuller
patent: 2939235 (1960-06-01), Wamser
patent: 4553345 (1985-11-01), Bercier et al.
patent: 4559732 (1985-12-01), Levy et al.
patent: 4891896 (1990-01-01), Boren
Brittain James R.
Frelich Arthur
Hope Cassandra L.
Hornbaker Robert
Rosen Leon D.
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