Ink jet recording apparatus

Details Ink jet recording apparatus Ink jet recording apparatus

2005-11-29

2005-11-29

Pham, Hai (Department: 2861)

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Ink jet

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Reexamination Certificate

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06969138

ABSTRACT:
An ink jet recording apparatus includes an ink jet head, a reference pulse generation circuit, and switch circuits. The reference pulse generation circuit is a circuit for generating, at a predetermined cycle, a first reference pulse P4abased on which a driving pulse is produced. A preliminary pulse P1is for vibrating an ink meniscus in the tip portion of a nozzle. A discharge pulse P2is for discharging an ink droplet through the nozzle. The switch circuits selectively input, to piezoelectric actuators, the preliminary pulse P1and the discharge pulse P2generated by the reference pulse generation circuit.

REFERENCES:
patent: 5980015 (1999-11-01), Saruta
patent: 6460959 (2002-10-01), Momose et al.
patent: 6508532 (2003-01-01), Hawkins et al.
patent: 6761423 (2004-07-01), Ozaki et al.

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