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. 19, 2008
Filed:
Mar. 01, 2004
Satoru Tobita, Ibaraki, JP;
Yoshitaka Akiyama, Ibaraki, JP;
Toshiharu Sumiya, Ibaraki, JP;
Yoshikane Matsumoto, Ibaraki, JP;
Satoru Tobita, Ibaraki, JP;
Yoshitaka Akiyama, Ibaraki, JP;
Toshiharu Sumiya, Ibaraki, JP;
Yoshikane Matsumoto, Ibaraki, JP;
Ricoh Printing Systems, Ltd., Tokyo, JP;
Abstract
An inkjet head includes a common ink puddle section, a nozzle plate having a plurality of nozzle orifices, an ink flow channel substrate having grooves communicating from the common ink puddle section to the nozzle orifices, and being formed alternatively in front and back surfaces of the ink flow channel substrate, to end sections of the grooves the nozzle plate being fixed, a chamber plate being stacked on the ink flow channel substrate, and having pressure generation chambers corresponding to the nozzle orifices, a diaphragm stacking on the chamber plate opposite from the ink flow channel substrate, a pressure generator provided on the diaphragm for the respective pressure generation chambers to generate a change in an internal pressure. Preferably, a volumetric capacity of the pressure generation chambers is changed in accordance with a change in the pressure, to eject an ink droplet from the nozzle orifice.