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. 16, 2010
Filed:
Dec. 28, 2006
Yoshinori Morooka, Mitaka, JP;
Yoshinori Morooka, Mitaka, JP;
Canon Finetech Inc., Joso-shi, JP;
Abstract
In an inkjet printing apparatus using plural line type inkjet printing heads for one color ink, and forming an image by dividing image data into pieces corresponding to the plural printing heads, a complementary printing operation using a simple configuration is achieved without causing a substantial decrease in printing speed even when one printing head has a poorly ejecting nozzle. When a one printing head has a poorly ejecting nozzle, a corresponding nozzle of another printing head complements the printing operation assigned to the poorly ejecting nozzle. At this time, the same piece of divided image data is fed to the one and the other printing heads. Then, the printing operation of the one printing head is made invalid only at the timing of driving the poorly ejecting nozzle, and the printing operation of the second printing head is made valid only at the timing of driving the corresponding nozzle.