Liquid ejection apparatus

Details Liquid ejection apparatus Liquid ejection apparatus

2005-09-29

2008-11-18

Luu, Matthew (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S057000, C347S054000, C347S010000

Reexamination Certificate

active

07452059

ABSTRACT:
The liquid ejection apparatus comprises: a nozzle through which liquid is ejected; a pressure chamber which accommodates the liquid to be ejected from the nozzle; a supply side flow path which fills the liquid from a supply system into the pressure chamber; an actuator which is provided on at least one wall of the pressure chamber and changes a volume of the pressure chamber; and a drive signal generating device which generates a drive signal including at least a first drive signal having a time period T1which drives the actuator so as to expand the pressure chamber, and a second drive signal having a time period T2which drives the actuator so as to contract the pressure chamber, wherein: a relationship between the time period T2of the second drive signal and a Helmholtz period Tc of the pressure chamber satisfies T2≦Tc/2; and when the actuator is operated by means of the drive signal to generate, in the nozzle, a pressure having a prescribed cycle in which a negative pressure acting in a direction which causes the pressure chamber to expand, and a positive pressure acting in a direction which causes the pressure chamber to contract arise alternately, a relationship between an absolute value of a first negative pressure Pn1generated initially from a static meniscus state of the liquid in the nozzle and an absolute value of a second negative pressure Pn2generated one cycle after the first negative pressure, satisfies |Pn1|≦|Pn2|.

REFERENCES:
patent: 6382754 (2002-05-01), Morikoshi et al.
patent: 6799821 (2004-10-01), Okuda
patent: 6962398 (2005-11-01), Okuda et al.
patent: 9-226106 (1997-09-01), None

Affiliated with

Also associated with

Rating

Liquid ejection apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Liquid ejection apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid ejection apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4026160