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. 07, 1986
Filed:
Apr. 02, 1985
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A thermosensitive recording sheet comprises a support material; a thermosensitive coloring layer formed on the support material, comprising a colorless or light-colored leuco dye, and an acidic material which colors the leuco dye upon application of heat thereto; and a protective layer formed on the thermosensitive coloring layer, comprising a water-soluble polymeric binder and silica powder with an oil absorption of 150% or more and with a bulk density of 5 ml/g or more, which are measured in accordance with Japanese Industrial Standard K 5101. This thermosensitive recording sheet has high dynamic thermal coloring sensitivity, is capable of yielding sharp images with high image density at low energy consumption with good thermal head-matching properties, and is resistant to chemicals.