Card – picture – or sign exhibiting – Illuminated sign – Lamp box
Patent
1980-05-21
1981-07-07
Pitrelli, John F.
Card, picture, or sign exhibiting
Illuminated sign
Lamp box
40547, G09F 1318
Patent
active
042767059
ABSTRACT:
A graphical display apparatus having an enclosure with a thin opaque cover made up of an outermost sheet of paper bearing a design, to serve as a display face, and an underlying sheet of aluminum foil backed by an aluminum screen. Incandescent lights are mounted within the enclosure to light its interior. Through the use of pointed markers made of transparent plastic, pinpoints of light can be spotted where desired on the display face for any of various purposes. This is accomplished by pushing the markers through the display face, aluminum foil and aluminum screen at desired locations. The markers are exposed to light in the interior of the enclosure as they pierce the aluminum foil, and therefore show up as points of light on the display face. The incandescent lights in the enclosure emit heat, as a result of which the layer of aluminum foil reacts to bring about a tightening and smoothing of the display face. The aluminum screen holds the markers in position after they are pushed through the cover of the enclosure to position them on the display face.
REFERENCES:
patent: 2051288 (1936-08-01), Curtis
patent: 3131496 (1964-05-01), Schropp
patent: 3530615 (1970-09-01), Meyer
patent: 3568357 (1971-03-01), Lebensfeld
patent: 3758972 (1973-09-01), Egermayer
Barth Clifford E.
Barth William L.
Crowe John H.
Pitrelli John F.
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