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:
Apr. 24, 1984
Filed:
Feb. 24, 1982
Keiichi Maruta, Numazu, JP;
Yukihiro Yuyama, Numazu, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A thermosensitive recording material is disclosed suitable for use in thermosensitive-recording-type tickets, including magnetic tickets, and thermosensitive-recording-type labels, comprising a support material; a thermosensitive coloring layer formed on the front side of the support material, which thermosensitive coloring layer comprises a leuco dye and an acidic material capable of coloring the leuco dye when heat is applied thereto; and a protective layer formed on the thermosensitive coloring layer, which protective layer comprises a polyvinyl alcohol with a saponification ratio ranging from 70% to 85% and is capable of preventing intrusion of materials which may discolor the thermosensitive coloring layer.