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:
May. 16, 2000
Filed:
Jan. 18, 1996
Toshiharu Inui, Yokohama, JP;
Keiichi Murai, Yokohama, JP;
Hiromitsu Hirabayashi, Yokohama, JP;
Mayumi Yamamoto, Tokyo, JP;
Yoshihisa Takizawa, Machida, JP;
Miyuki Fujita, Tokyo, JP;
Fumihiro Gotoh, Kawasaki, JP;
Masaya Uetsuki, Yokohama, JP;
Mikio Sanada, Yokohama, JP;
Eriko Saito, Fujisawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
When a black image region is printed, the overall pixels in the region is printed by a black ink. Then, a cation type cyan ink which makes a coloring agent in the ink insoluble is printed on the pixels of a predetermined pattern. By this, the dye of the black ink is maintained near the surface of the printing medium to increase density of the black image. At the same time, for preventing variation of tone of the black image, the pixels of the predetermined pattern are printed by a yellow ink.