Title:
【発明の名称】圧電式インクジェットプリンタヘッド
Document Type and Number:
Japanese Patent JP2867437
Kind Code:
B2
Abstract:
A piezoelectric ink jet print head including a common laminar piezoelectric element disposed for activating two or mor ink jetting devices each of which has an ink chamber for ejecting a droplet of ink. The laminar piezoelectric element consists of a plurality of piezoelectric ceramic layers and a plurality of electrode layers which are alternately laminated on each other. Each piezoelectric ceramic layer is polarized in a polarizing direction perpendicular to the direction of lamination of the piezoelectric ceramic and electrode layers. A voltage is applied selectively to the electrode layers for displacing at least one of the piezoelectric ceramic layers in the polarizing direction, so as to change the volume of the ink chamber of a selected one of the ink jetting devices. The electrode layers is formed of a thermistor which has a Curie point lower than that of the piezoelectric ceramic layers and which has a positive temperature coefficient of resistance so that the thermistor is an electrically insulating material at a temperature above the Curie point thereof.
Inventors:
TAKAHASHI YOSHIKAZU
SUZUKI MASAHIKO
TAKEUCHI MAKOTO
SUZUKI MASAHIKO
TAKEUCHI MAKOTO
Application Number:
JP18623289A
Publication Date:
March 08, 1999
Filing Date:
July 19, 1989
Export Citation:
Assignee:
BURAZAA KOGYO KK
International Classes:
B41J2/045; B41J2/055; B41J2/14; (IPC1-7): B41J2/045; B41J2/055
Domestic Patent References:
| JP310846A | ||||
| JP2501467A | ||||
| JP63178571A |
Other References:
【文献】米国特許4584590(US,A)
Attorney, Agent or Firm:
Haruyuki Ikeda (2 outside)