Device for providing a semi-permanent luminescent display

Abstract

A device is described for providing a semi-permanent luminescent display which includes a first sheet of substantially transparent material provided with a luminescent dye in the form of a fluorescent dye dispersed therethrough. The first sheet of fluorescent material is provided with a smooth major surface which is disposed in opposition to a smooth surface of a second dispersive opaque sheet of material. The two sheets of material are coextensive with one another and one of these sheets is pliable to permit the selective application of pressure on portions thereof to cause the smooth surfaces to come into contact with one another and cause the same to adhere to each other in the regions of these selective portions. Such adherence disperses the light in the fluorescent sheet which impinges at said portions and results in a luminescent effect corresponding to the indicia or pattern impressed. Separation of the sheets from one another terminates the intimate contact at the adhered interface portions between the smooth surfaces and terminates the luminescent impression, pattern or image.

Dependencies are inferred from the claim text.