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US 4,375,492 AGranted
Dielectric record material
AssigneeAppleton Papers Inc.
InventorRichard E. Fox
Life of this patent
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Abstract
A reactive dielectric record material is disclosed which comprises certain chromogenic material and certain phenolic material. This record material produces images by means of a dielectric process wherein two color-forming agents contained within a reactive image-bearing surface are brought into reactive, color-producing contact by means of colorless toner material.
Claims11
A dielectric record material which comprises:
- (a) an electrically conductive substrate and
- (b) an electrically insulating coating on the surface of the substrate comprising dielectric polymer material and a color-forming composition comprising:
- (i) at least one basic chromogenic material;
- and
- (ii) phenolic material selected from the group consisting of phthaleins and resorcinol monobenzoate which will react with said chromogenic material to form a fixed colored mark upon application of a substantially colorless toner comprising a material which will provide mutual solution or co-melting of said reactants in selective areas of the record material upon the application of heat or solvent vapors.
2 more elements
Dependencies are inferred from the claim text.