APPARATUS AND METHOD FOR INK JET RECORDING

Japanese Patent JP3920596

B2

PROBLEM TO BE SOLVED: To prevent ink in a nozzle from entraining bubbles as much as possible, in a method by which a dot size is varied by ejecting ink liquid droplets plural times.
SOLUTION: This ink jet recording apparatus has a pressure chamber 11 for storing ink, a nozzle 13 for ejecting the ink in the pressure chamber by communicating with the pressure chamber, and an actuator consisting of a diaphragm 14 for expanding an contracting the volume of the pressure chamber corresponding to a drive signal from a drive signal generating means 2 and a piezoelectric member 15. The apparatus ejects ink drops plural times continuously from the nozzle to express gradation. The drive signal generating means successively generates the expanding pulse for expanding the volume of the pressure chamber and the contracting pulse for contracting the volume of the pressure chamber, as a drive signal, corresponding to the timing in which the time lag between the center of the expansion pulse and the center of the contracting pulse matches the resonance cycle of meniscus to be generated in the nozzle by the ink in the pressure chamber.

Ryutaro Kusunoki

JP2001191800A

May 30, 2007

June 25, 2001

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TOSHIBA TEC CORPORATION

B41J2/055; B41J2/045; B41J2/205; (IPC1-7): B41J2/045; B41J2/055; B41J2/205

JP7178926A
JP1024570A
JP952360A
JP200219103A
JP6122959A
JP2001219556A
JP6426454A

US20010002836

Takehiko Suzue
Satoshi Kono
Makoto Nakamura
Sadao Muramatsu
Ryo Hashimoto

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