Air-bubble detection apparatus of ink jet recording head, and me

Details Air-bubble detection apparatus of ink jet recording head, and me Air-bubble detection apparatus of ink jet recording head, and me

1992-11-03

1996-03-19

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Controller

347 92, B41J 201

Patent

active

055006574

ABSTRACT:
An air-bubble detection apparatus which detects the presence or absence of the occurrence of air bubbles in an ink passage by detecting if the voltage which develops across an electrostrictive vibrator by mechanical strain as a result of the ink in the ink passage of an ink jet recording head being moved, exceeds an excess voltage above a drive voltage. In addition, a method and apparatus for restoring the recording head to its operating condition, which prevents ink and energy from being wasted and makes efficient printing possible by restoring the recording head in which the occurrence of air bubbles is detected by using the above air-bubble detection apparatus.

REFERENCES:
patent: 4293867 (1981-10-01), Isayama
patent: 4498088 (1985-02-01), Kanayama
patent: 4518974 (1985-05-01), Isayama

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