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:
Jun. 30, 1992
Filed:
Nov. 21, 1990
Applicant:
Inventors:
Akira Kobayashi, Aichi, JP;
Makiko Tokita, Chiba, JP;
Masahiro Nakagawa, Hokkaido, JP;
Kenji Yasuda, Chiba, JP;
Assignee:
Oji Paper Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21M / ; D21H / ;
U.S. Cl.
CPC ...
162135 ; 162158 ; 1621682 ; 1621812 ; 428481 ;
Abstract
An ink-jet recording sheet that contains as main ingredients 69-95% wood pulp and 4-30 wt % precipitated calcium carbonate and which has a Stockigt sizing degree of 2-25 seconds as measured for a basis weight of 64 g/m.sup.2, or a Stockigt sizing degree ranging from 5.times.(basis weight/64).sup.2 to 25.times.(basis weight/64).sup.2 at a water extracting pH of 4.5-7.5. This sheet allows a clear color to develop and provides an image having circular dots and sharply defined edges. This sheet may also incorporate a cationic synthetic polymer and an alkylketene dimer.