Liquid droplet ejecting apparatus and a method of driving a...

Details Liquid droplet ejecting apparatus and a method of driving a... Liquid droplet ejecting apparatus and a method of driving a...

2005-12-05

2008-08-12

Meier, Stephen D. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Controller

C347S010000

Reexamination Certificate

active

07410233

ABSTRACT:
A liquid droplet ejecting apparatus having: a pressurizing device; a pressure generation chamber whose volume expands or contracts by a movement of the pressurizing device; a liquid droplet ejecting head having a nozzle communicating with the pressure generation chamber; and a drive signal generator which generates the drive signal for operating the pressurizing device, and causing to eject liquid droplets through the nozzle, wherein the drive signal comprises: an expansion pulse to expand the volume of the pressure generation chamber; a first contraction pulse following the expansion pulse to contract the volume; and a second contraction pulse after the first contraction pulse to contract the volume, wherein a pulse width of the expansion pulse is 0.7AL through 1.3AL, and a pulse width of the first contraction pulse is 0.3 AL through 1.5 AL, where AL is ½ of an acoustic resonance period of the pressure generation chamber.

REFERENCES:
patent: 6099103 (2000-08-01), Takahashi
patent: 6290315 (2001-09-01), Sayama
patent: 6328398 (2001-12-01), Chang
patent: 6450603 (2002-09-01), Chang
patent: 6899409 (2005-05-01), Kusunoki
patent: 2004/0155915 (2004-08-01), Kitami et al.
patent: 2003-276200 (2003-09-01), None

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