Form for concealing variable printed information
AssigneeDocumotion Research, Inc.
InventorsJoel Bryan Van Boom, Chuck Casagrande, Bernard Willem “Wim” Scheggetman
Life of this patent
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Abstract
Variable confidential information (12) is printed over scrambling pattern (14) which is formed of thermochromatic ink. Information (12) cannot be read due to the presence of the underlying scrambling pattern. The information becomes readable when heat is applied to the thermochromatic ink and the optical properties of the thermochromatic ink are altered. Preferably, the alteration of the optical properties of the thermochromatic ink is irreversible
Claims4
A form for concealing variable printed information and including a thermochromatic scrambling pattern, wherein variable information printed over the thermochromatic scrambling pattern cannot be discriminated from the thermochromatic scrambling pattern until heat is applied and the optical properties of the thermochromatic scrambling pattern are altered and wherein the thermochromatic scrambling pattern is on the underside of a sheet of transparent material and wherein the variable information is printed on the upper side of the sheet of transparent material.
A form for concealing variable printed information and including a thermochromatic scrambling pattern, wherein variable information printed over the thermochromatic scrambling pattern cannot be discriminated from the thermochromatic scrambling pattern until heat is applied and the optical properties of the thermochromatic scrambling pattern are altered and wherein the thermochromatic pattern is on the upper side of a substrate and wherein the variable information is printed on the upper side of a sheet of transparent material which is adhered to the upper side of the substrate.
Dependencies are inferred from the claim text.