Loading patent…
AssigneeCanon Kabushiki Kaisha
InventorsOsamu Iwasaki, Kiichiro Takahashi, Hitoshi Nishikori, Naoji Otsuka, Minoru Teshigawara, Tetsuya Edamura, Yoshinori Nakagawa, Satoshi Seki
Estimating the term…
In an ink jet printing apparatus using many types of inks to execute bidirectional printing, if ejection opening rows for yellow, magenta, and cyan inks are symmetrically arranged, ejection opening rows for a black ink are arranged adjacent to the most inside ejection opening rows for the yellow ink. Thus, a difference in color between forward scanning and backward scanning is determined by a difference in coloring between the black ink and the yellow ink. In this case, a possible color drift attributed to bidirectional printing can be suppressed by selecting the inks so that the difference in coloring between the black ink and the yellow ink is smaller than that between the black ink and the other color inks.
An ink jet printing apparatus that uses a printing head and scans the printing head along a main scanning direction over a printing medium in forward and backward directions so that during each of a forward scan and a backward scan of the printing head, dots are formed with a plurality of types of ink ejected from ejection openings of the printing head so as to perform printing to the printing medium,
A printing head used by an ink jet printing apparatus that scans the printing head along a main scanning direction over a printing medium in forward and backward directions so that during each of a forward scan and a backward scan of the printing head, dots are formed with a plurality of types of ink ejected from ejection openings of the printing head so as to perform printing to the printing medium,
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
With a reciprocating print head printing in both directions across the paper width: colour shift prevention
Typewriters
Term ended 6 Dec 2024 (estimated)
This application claims priority from Japanese Patent Application No. 2003-169969 filed Jun. 13, 2003, which is incorporated hereinto by reference.
1. Field of the Invention
The present invention relates to an ink jet printing apparatus, and more specifically, to an ink jet printing apparatus that executes printing by scanning a printing head in two directions.
FIG. 1 is a schematic diagram illustrating the chip configuration of a printing head used in an embodiment of the present invention;
FIG. 2 is a diagram showing the arrangement of ejection opening rows in a color ink chip of a printing head used in a first embodiment of the present invention;
FIG. 3 is a diagram illustrating the relationship between combinations of a plurality of inks and their application order and a scanning direction of the printing head;
Embodiments of the present invention will be described below with reference to the drawings.
For an ink jet printing apparatus according to a first embodiment of the present invention, a detailed description will be given of inks used, the configuration of a printing head, the configuration of a printer, and the like.
Inks