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:
Oct. 28, 1986
Filed:
Sep. 30, 1985
Kiyotaka Iiyama, Mishima, JP;
Nirohiko Inaba, Numazu, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A two-color thermosensitive recording material comprising a support material, a high temperature color-forming layer comprising a first leuco dye and a first color developer overlaying the support material, a decolorizing layer containing a decolorizing agent overlaying the high temperature color-forming layer, and a low-temperature color-forming layer comprising a second leuco dye and a second color developer overlaying the decolorizing layer, wherein the melting points of the first leuco dye and the first color developer of the high temperature color-forming layer are 150.degree. C. or higher, the melting points of the second leuco dye and the second color developer of the low temperature color-forming layer are 60.degree. C. or higher and the melting point of at least one of the second leuco dye and the second color developer is 130.degree. C. or lower, and the melting point of the decolorizing agent is in the range of 120.degree. C. to 160.degree. C.