Ink jet head

Details Ink jet head Ink jet head

1993-02-19

1995-09-19

Hartary, Joseph W.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

B41J 214

Patent

active

054519934

ABSTRACT:
A structure for an ink jet head comprising: an ink passage adapted to be supplied with ink; a nozzle communicating with the ink passage and positioned to have exit deep from the end face of the ink jet head; a hollow portion formed in the head end face to communicate with the nozzle exit and to have a larger diameter than the nozzle; and ink ejecting means disposed to correspond to the ink passage and energized electrically to eject the ink in the ink passage out of the nozzle end face through the hollow portion. As a result, the ink droplets can always be ejected in a correct direction by suppressing the fluctuation of their flowing direction, which might otherwise be caused by the breakage in the periphery of the opening in the head end face or by the ooze of the ink. Thus, the ejection characteristics are uniformed by absorbing the errors due to the cutting or grinding step.

REFERENCES:
patent: 3823408 (1974-07-01), Gordon
patent: 4246076 (1981-01-01), Gardner
patent: 4389654 (1983-06-01), Bar-on
patent: 4675083 (1987-06-01), Bearss

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