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:
Nov. 18, 1997
Filed:
Jun. 29, 1995
Sony Corporation, Tokyo, JP;
Abstract
A thermal transfer recording medium comprises a substrate and an ink layer formed on the substrate. The ink layer comprises a first dye having a light absorption peak which has a maximum absorption wavelength, .lambda..sub.max, of 420 to 500 nm and a half-value width of at least 100 nm, and a second dye having a light absorption peak which which has a maximum absorption wavelength, .lambda..sub.max, of 570 to 650 nm and a half-value width of at least 100 nm. The ink layer may further comprise a third dye having a light absorption peak whose maximum absorption wavelength, .lambda..sub.max, of 500 to 550 nm and/or a fourth dye having a light absorption peak whose maximum absorption wavelength, .lambda..sub.max, of 620 to 680 nm. When a density-graded indication is made using the thermal transfer recording medium, there can be obtained images whose black hue shift is small in all the density range.