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:
Jan. 10, 2006
Filed:
Aug. 31, 2001
Satoru Hosono, Nagano, JP;
Tomoaki Takahashi, Nagano, JP;
Tomohiro Sayama, Nagano, JP;
Tsuyoshi Kitahara, Nagano, JP;
Hirofumi Teramae, Nagano, JP;
Kenji Otokita, Nagano, JP;
Satoru Hosono, Nagano, JP;
Tomoaki Takahashi, Nagano, JP;
Tomohiro Sayama, Nagano, JP;
Tsuyoshi Kitahara, Nagano, JP;
Hirofumi Teramae, Nagano, JP;
Kenji Otokita, Nagano, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
After assembling an ink jet recording head which includes a plurality of nozzle orifices forming at least one nozzle row, pressure chambers each communicated with the associated nozzle orifice, pressure generating elements each generating pressure fluctuation in ink provided in the associated pressure chamber to eject an ink droplet from the associated nozzle orifice, a natural period of the ink pressure fluctuation in the pressure chamber of the assembled recording head is measured. Then the assembled recording head is classified into a plurality of ranks, based on the measured natural period.