Rabin & Champagne, P.C
Method of adjusting electromechanical element of ink jet print head to increase uniformity of performance characteristic
 A method of adjusting an ink jet head having at least one polarized electromechanical transducer forming an ink pressure chamber from which ink drops are ejected when the electromechanical transducer is deformed. The method includes the steps of performing a first polarization operation where the electromechanical transducer is polarized into saturation in a first direction, and performing second polarization operation where the electromechanical transducer polarized by the first polarization operation is polarized in a second direction opposite to the first direction so that the electromechanical transducer is polarized to a predetermined level. 
Oki Data Corporation
B B B Y B B B
B41J B41J B41J Y10T B41J B41J B41J
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Kiyoshi Hiroshi Masahiko Mitsuru
Ikeda Kikuchi Shimosugi Kishimoto