Luminous sheet and indicia

Details Luminous sheet and indicia Luminous sheet and indicia

1986-06-09

1988-05-17

Fields, Carolyn E.

Radiant energy

Luminophor irradiation

Methods

2504621, 40542, F21K 200

Patent

active

047452862

ABSTRACT:
A member, such as a sheet of paper or plastic, is coated with phosphorescence glow on the dark material and then layered or coated with photographic emulsion so that an image can be produced on the surface of the member by a photographic process, and thereafter, an image can be produced on the surface by illumination means. In another form of the invention, a sheet of paper or plastic has luminescent material incorporated therein to cause one side of the sheet of material to glow in the dark. The sheet is assembled onto a clipboard and thereby provides means by which a written message can easily be formed in the dark.

REFERENCES:
patent: 1543931 (1925-06-01), Law
patent: 2382806 (1945-08-01), Motson
patent: 2460221 (1949-01-01), Gordon
patent: 2887379 (1959-05-01), Blake et al.
patent: 3107138 (1963-10-01), Massena
patent: 3879611 (1975-04-01), Schroeder
patent: 4122237 (1978-10-01), Kaiserman
patent: 4543308 (1985-09-01), Schumann et al.

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