Incremental printing of symbolic information – Ink jet – Ejector mechanism
Patent
1997-04-22
1998-08-04
Fuller, Benjamin R.
Incremental printing of symbolic information
Ink jet
Ejector mechanism
310331, 310358, B41J 2045
Patent
active
057901562
ABSTRACT:
A ferroelectric relaxor ceramic actuator material, such as lead magnesium niobate ("PMN"), has high electromechanical conversion efficiency, exhibits wide operating and manufacturing temperature ranges, does not require permanent polarization, and provides useful mechanical activity with reduced electrical drive voltages. A PMN actuator (66) may be bonded to an actuator diaphragm (64) with a high temperature soldering or brazing process. PMN material also has a diffuse Curie point range in which the dielectric constant (40), "d" coefficient (32), and dielectric loss (42) characteristics all rise to a peak and then fall as the temperature increases. A phase-change ink-jet print head (50) employs a PMN actuator that is compounded with lead titanate ("PT") to increase the temperature (T.sub.M) at which the peak dielectric constant occurs. The print head is operated at a temperature beyond the peak where the PMN:PT actuator "d" coefficient decreases as the temperature increases such that an increase in ink-jet drop ejection velocity caused by reduced ink viscosity is compensated for by a corresponding reduction in mechanical activity. The PMN:PT actuator thereby relaxes the temperature regulation and heat spreading requirements of the phase-change ink-jet print head.
REFERENCES:
patent: 4265668 (1981-05-01), Fujiwara et al.
patent: 4716134 (1987-12-01), Yamaguchi et al.
patent: 5028812 (1991-07-01), Bartky
patent: 5087930 (1992-02-01), Roy et al.
patent: 5210455 (1993-05-01), Takeuchi et al.
patent: 5212497 (1993-05-01), Stanley et al.
patent: 5345139 (1994-09-01), Gururaja et al.
Adams Ronald L.
Cross L. Eric
Jiang Qiyue Chia
Le Hue P.
Mutton Jon C.
D'Alessandro Ralph
Dickens Charlene
Fuller Benjamin R.
Preiss Richard B.
Tektronix Inc.
LandOfFree
Ferroelectric relaxor actuator for an ink-jet print head does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ferroelectric relaxor actuator for an ink-jet print head, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ferroelectric relaxor actuator for an ink-jet print head will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1182908