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:
Oct. 13, 2020
Filed:
Feb. 19, 2019
Screen Holdings Co., Ltd., Kyoto, JP;
Asuka Muramatsu, Kyoto, JP;
Tomotaka Kato, Kyoto, JP;
SCREEN HOLDINGS CO., LTD., Kyoto, JP;
Abstract
A nozzle operating situation checking method for inkjet printing apparatus which perform printing by dispensing ink droplets from a printing head having a plurality of nozzles arranged in a transverse direction of a printing medium. The method includes the following steps: a step of printing a testing chart; a step of reading the testing chart downstream of the printing head; a step of extracting grid boxes; a step of deriving a standard width from width sizes; a step of detecting a box having a width size equal to or larger than a corrected standard width by comparing the width sizes of the respective boxes with the corrected standard width; and a step of determining that a missing nozzle exists upon detection of the box having a width size equal to or larger than the corrected standard width.