Ink jet head
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United States of America Patent
Stats
-
Sep 19, 1995
Grant Date -
N/A
app pub date -
Feb 19, 1993
filing date -
Feb 20, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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