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:
Nov. 02, 2004
Filed:
May. 05, 2003
Masanori Kinomoto, Yamatokoriyama, JP;
Takanori Kamoto, Nara, JP;
Hiromi Nakatsu, Amagasaki, JP;
Kiyofumi Morimoto, Tenri, JP;
Seita Suzuki, Yamatokoriyama, JP;
Ichiro Fujii, Gose, JP;
Hiroaki Nakaya, Osakasayama, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An image recording apparatus based on a color ink-jet scheme provided with an ink set consisting of one or more than one colors of inks and a black ink and an ink-jet printing unit, wherein the initial contact angles &thgr; of two colors of inks, namely, a color ink and a black ink, fall within the range from 30 to 80°, the contact angle variation Xa of the ink A as obtained by the dynamic liquid absorption measurement after the elapsed time of 1 second falls within the range −70<Xa<−10(°), the dot area ratio Ya of the ink A after the elapsed time of ta seconds-falls in the range 1.5<Ya, the contact angle variation Xb of the ink B as obtained by the dynamic liquid absorption measurement after the elapsed time of 1 second falls within the range −15<Xb<0(°), and the dot area ratio Yb of the ink B after the elapsed time of tb seconds falls within the range 1.0<Yb<1.7, where printing is made first with the ink A and subsequently with the ink B.