公开(公告)号：US4473830A

公开(公告)日：1984-09-25

申请号：US457772

申请日：1983-01-13

申请人： Michael J. Piatt ,  Mark C. Bowers ,  Mark E. Brown

发明人： Michael J. Piatt ,  Mark C. Bowers ,  Mark E. Brown

IPC分类号： B41J2/025 ,  G01D18/00

CPC分类号： B41J2/025

摘要： An ink jet print head includes a manifold defining a fluid receiving reservoir, and an orifice plate mounted on the manifold and defining a plurality of orifices which communicate with the reservoir. Fluid flows through the orifices and emerges as fluid filaments which break up into jet drop streams. A stimulator transducer contacts the orifice plate and, upon receipt of a drive signal, vibrates the orifice plate so as to cause bending waves to travel along the plate. The bending waves stimulate the breakup of the jet drop streams. A sensor transducer is mounted on the orifice plate at the opposite end thereof from the stimulator transducer. The sensor transducer produces an electrical feedback signal which is proportional in amplitude to the amplitude of the bending waves. This feedback signal is used by a drive circuit to control the amplitude of the drive signal applied to the stimulator transducer. The sensor transducer is calibrated by observing the breakup of jet drop streams as the drive signal is varied, and when an optimum breakup is observed, the output of the sensor transducer is adjusted to a predetermined amplitude level. This adjustment is made by applying D.C. pulses of proper polarity to the sensor transducer, poling the piezoelectric transducer.

摘要翻译： 喷墨打印头包括限定流体接收容器的歧管和安装在歧管上并限定多个与储存器连通的孔的孔板。 流体流过孔口，并以流体细丝的形式流出，从而分解成喷射流。 刺激器传感器接触孔板，并且在接收到驱动信号时振动孔板，以使弯曲波沿板移动。 弯曲波浪刺激了喷射流的分解。 传感器传感器安装在孔板的与刺激传感器相反的一端。 传感器传感器产生一个电波反馈信号，其幅度与弯曲波幅度成比例。 该反馈信号由驱动电路用于控制施加到刺激换能器的驱动信号的幅度。 传感器传感器通过观察驱动信号变化时喷射液滴流的分解进行校准，当观察到最佳分解时，将传感器传感器的输出调节到预定的振幅水平。 通过将适当极性的直流脉冲施加到传感器传感器，极化压电传感器来进行此调整。