The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 19, 1978
Filed:
Apr. 19, 1976
David P Habib, East Greenwich, RI (US);
Morgan E Gager, Warwick, RI (US);
Trans World Technology Laboratories, Inc., Fiskeville, RI (US);
Abstract
Premature color formation and fogging in composites used in two sheet thermographic imaging systems are prevented by providing a polymeric barrier coating between the two interactive layers. The barrier coat serves to keep the volatilizable organic acid in the donor sheet from diffusing into the dye precursor receptor sheet during storage or transport, but permits the desired diffusion at thermographic imaging temperatures. Suitable barrier coat layers, which must be acid-resistant, include chlorinated rubber, chlorinated polypropylene, styrene-acrylonitrile copolymer, chlorinated paraffins, polystyrene and vinyl chloride-vinyl acetate copolymer.