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. 12, 2003
Filed:
Jun. 11, 2001
Hideaki Horio, Fukuoka, JP;
Koji Matsuo, Fukuoka, JP;
Haruyuki Hatano, Kumamoto, JP;
Yutaka Miyazono, Fukuoka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An inkjet recording apparatus includes a moving device which moves an inkjet head relative to a recording medium. When the head is moved relative to the recording medium by the moving device, a nozzle of the head ejects ink onto the recording medium, so that recording is carried out. The inkjet head includes (a) pressure chambers containing ink, (b) nozzles communicating through the pressure chambers, (c) piezoelectric elements, (d) piezoelectric actuators that deform to increase or decrease the capacities of the pressure chambers due to piezoelectric effect of the piezoelectric elements, and (e) a controller for driving the actuators at a frequency not less than 20 kHz. This structure allows the actuators to operate substantially noiseless, and an image can be recorded at higher speed.