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:
Aug. 25, 2020
Filed:
Jun. 26, 2019
Kyocera Document Solutions Inc., Osaka, JP;
Yuichiro Kurokawa, Osaka, JP;
KYOCERA Document Solutions Inc., Osaka, JP;
Abstract
In a method for detecting an ejection abnormality of a nozzle according to the present disclosure, a plurality of nozzles of a liquid ejection head are caused to execute an operation of ejecting liquids so that a nozzle check pattern including check areas each drawn solely by each of the plurality of nozzles and a solid pattern including a solid printed area are formed on part of a sheet. A first density value indicating a density value of a ground color of the sheet and a second density value indicating a density value of the solid pattern are acquired. A threshold value for detecting an ejection abnormality of each of the plurality of nozzles is derived from the first density value and the second density value. It is determined, using the threshold value, whether or not each of the check areas of the nozzle check pattern is drawn.