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:
Mar. 19, 2013
Filed:
Oct. 30, 2008
Taichi Watanabe, Tokyo, JP;
Yuji Sawa, Tokyo, JP;
Kei Takigawa, Tokyo, JP;
Naoya Morohoshi, Shizuoka, JP;
Kiyofumi Nagai, Tokyo, JP;
Taichi Watanabe, Tokyo, JP;
Yuji Sawa, Tokyo, JP;
Kei Takigawa, Tokyo, JP;
Naoya Morohoshi, Shizuoka, JP;
Kiyofumi Nagai, Tokyo, JP;
Nippon Paper Industries Co., Ltd., Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An ink jet recording medium having an ink receiving layer containing a binder which containing an acrylonitrile butadiene type copolymer, the butadiene concentration of the copolymer is 50 weight % or more, and an inorganic pigment on one or two sides of a base paper mainly composed of wood pulp, wherein the concentration ratio of the acrylonitrile butadiene type copolymer to 100 parts by weight of the inorganic pigment is from one part by weight to eight parts by weight, while 60 weight % or more of the inorganic pigment is kaolin with particles of 0.4 μm or more and below 4.2 μm which account for 64% or more as the cumulative value of the volumetric basis when measured using a laser diffraction method, and the surface roughness of the ink receiving layer is from 0.6 μm to 1.4 μm when a hard backing is used at a clamp pressure of 1,000 kPa according to JIS P8151.