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:
Feb. 19, 2002
Filed:
Sep. 08, 1998
Yasuyuki Takanaka, Urawa, JP;
Canon Kabushiki Kaisha, Toyko, JP;
Abstract
In case a defect in the ink discharge performance is generated in a nozzle in an ink jet printing head, the printing is executed by a main scanning operation of a printing head, excluding data corresponding to such defective nozzle. Then, a sub-scan is executed by a width corresponding to the defective nozzle, and the complementary printing is executed with a complementary recording nozzle without abnormality, in the returning main scan. When the total sum of the number of drives of the complementary recording nozzle exceeds a predetermined value, the amount of sub-scan for complementary recording, thereby changing the nozzle used therefor. In this manner, even in case of abnormality in a recording element, a defect-free record can be obtained by the complementary recording, and a substantial service life of the recording head can be extended in case of obtaining such defect-free record by the complementary recording.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile