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. 15, 2019
Filed:
Jan. 28, 2016
Konica Minolta, Inc., Chiyoda-ku, Tokyo, JP;
Shinya Matsuda, Takarazuka, JP;
KONICA MINOLTA, INC., Tokyo, JP;
Abstract
A liquid ejection head includes an ejection port to eject liquid, a pressure chamber communicating with the ejection port, and a piezoelectric element to pressurize the pressure chamber and eject from the ejection port, the liquid stored in the pressure chamber. At least a part of a wall portion defining the pressure chamber includes a portion where vibration characteristics are different between a pressurized state in which the pressure chamber is pressurized by the piezoelectric element and a depressurized state in which the pressure chamber is depressurized by ejecting the liquid from the ejection port and stopping pressurization to the pressure chamber, and the portion having different vibration characteristics is adapted to reduce pressure fluctuation in the pressure chamber in the depressurized state.