Pump, liquid transporting apparatus provided with the same,...

Details Pump, liquid transporting apparatus provided with the same,... Pump, liquid transporting apparatus provided with the same,...

2005-11-30

2008-05-13

Vo, Anh T. N. (Department: 2861)

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

C417S048000

Reexamination Certificate

active

07370946

ABSTRACT:
A pump includes an ink pressurizing chamber, an inlet port and an outlet port communicating with the chamber, a first valve member provided near the inlet port, a second valve member provided near the outlet port, a pressure adjustment channel communicating with the chamber, an electrode provided on a wall surface forming the channel, a driver IC which applies a voltage to the electrode, an insulating film provided on a surface of the electrode and in which when the voltage is applied to the electrode a wetting angle of ink on a surface of the insulating film is greater than that when no voltage is applied to the electrode, and a common electrode always in contact with ink in the chamber and held at a ground potential. Accordingly, a pump having a simple structure without any movable parts and with a low noise and less energy consumption can be provided.

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U.S. Appl. No. 11/084,800, filed Mar. 21, 2005.
Jing Ni, Chuan-Jiam Zhong, Shelley J. Coldiron an Marc D. Porter, Electrochemically Actuated Mercury Pump for Fluid Flow and Delivery, Anal. Chem, 2001, vol. 73, No. 1 pp. 103-110.

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