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:
Sep. 13, 2011
Filed:
Sep. 03, 2008
Eiichiro Watanabe, Matsumoto, JP;
Tomoji Suzuki, Matsumoto, JP;
Eiichiro Watanabe, Matsumoto, JP;
Tomoji Suzuki, Matsumoto, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
When a predetermined time T1ref has elapsed from performance of a previous cleaning, all nozzles in a nozzle row as an inspection target are driven at a drive frequency of a maximum frequency so that an air bubble in a filter chamber is crushed against a filter by increasing the flow rate in the filter chamber of an ink needle which connects an ink cartridge and a head, and a nozzle inspection to determine whether or not a nozzle defect is occurred is performed repeatedly until the nozzle defect occurs at a predetermined time interval T2ref (every week, for example) and, when the nozzle defect occurs, cleaning for ejecting the air bubble in the filter chamber to the outside is performed.