Electrostatic ink jet recording head with grouped electrodes

Details Electrostatic ink jet recording head with grouped electrodes Electrostatic ink jet recording head with grouped electrodes

1996-08-26

1999-10-05

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

B41J 206

Patent

active

059632313

ABSTRACT:
An ink jet recording head includes ejection electrodes arranged along ink paths that each have an ink outlet at one end and communicate with an ink chamber at the other end. The ejection electrodes are arranged in electrode sets, each set consisting of a number of ejection electrodes. The electrode sets have their corresponding ejection electrodes short-circuited, and are provided with control electrodes that are each common to respective ejection electrodes of a corresponding electrode set, and that are rearwardly offset from front ends of the ejection electrodes in an ink discharge direction. A voltage driver selectively imposes a voltage to groups of electrodes to provide a discharge biasing function, and selectively imposes a lower potential than a potential of the ejection electrodes to the control electrodes to provide a discharge restricting function.

REFERENCES:
patent: 4794463 (1988-12-01), Tamara et al.
patent: 5654745 (1997-08-01), Luque

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