Liquid transporting apparatus and method of manufacturing...

Details Liquid transporting apparatus and method of manufacturing... Liquid transporting apparatus and method of manufacturing...

2005-12-15

2008-12-16

Luu, Matthew (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C029S890100

Reexamination Certificate

active

07465038

ABSTRACT:
In a liquid transporting apparatus, when a thickness of a vibration plate is Tv (mm), a coefficient of elasticity of the vibration plate is Ev (kg/mm2), a thickness Tp of a piezoelectric layer is Tp (mm), a coefficient of elasticity of the piezoelectric layer is Ep (kg/mm2), a length of a pressure chamber is Wc (mm), a length of partition wall sections in a width direction of the pressure chamber is Wa (mm), a thickness Ta of an adhesive layer interposed between the partition wall sections and the vibration plate is Ta (mm), a coefficient of elasticity of the adhesive layer is Ea (kg/mm2), and further when A=((Tv+Tp)3×(Ev+Ep)/2)/Wc1/2and B=Ea×Wa/Ta, values of A and B satisfy a relationship of −0.03A−1200(1/B)+0.08>0. Accordingly, a fluctuation in a liquid transporting velocity due to difference in drive patterns of pressure chambers can be suppressed assuredly without performing any special process on a piezoelectric actuator.

REFERENCES:
patent: 6074047 (2000-06-01), Hotomi et al.
patent: 7270404 (2007-09-01), Mita
patent: 7396113 (2008-07-01), Mita
patent: 2003/0016273 (2003-01-01), Sakamoto et al.
patent: 2004/0141032 (2004-07-01), Matsuzawa et al.
patent: 2004/0223035 (2004-11-01), Hirota
patent: 1232865 (2002-08-01), None
patent: 2004284109 (2004-10-01), None
European Search Report (3 pages) for (corresponding) European Patent Application No. 05027508.0.

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