Liquid ejection head and image forming apparatus

Details Liquid ejection head and image forming apparatus Liquid ejection head and image forming apparatus

2007-05-29

2008-12-30

Martin, J. San (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C347S046000, C347S047000, C347S068000, C310S348000

Reexamination Certificate

active

07471028

ABSTRACT:
The liquid ejection head has: a surface acoustic wave propagation body in which a surface acoustic wave propagates; a nozzle orifice formed in the surface acoustic wave propagation body; a surface acoustic wave generation device which is provided on the surface acoustic wave propagation body around the nozzle orifice and excites the surface acoustic wave propagation body so that a surface acoustic wave is generated in the surface acoustic wave propagation body; a liquid supply device which supplies liquid to the nozzle orifice; and a guide member which is provided in a center of the nozzle orifice and has a tapered conical surface shape section that projects from an ejection surface of the nozzle orifice in an ejection direction, the liquid forming a curved liquid surface in the nozzle orifice in accordance with the tapered conical surface shape section due to surface tension, wherein the surface acoustic wave generates a capillary wave which propagates through the curved liquid surface in the nozzle orifice and which ejects the liquid from an apex section of the tapered conical surface shape section.

REFERENCES:
patent: 5142307 (1992-08-01), Elrod et al.
patent: 2005/0277839 (2005-12-01), Alderman et al.
patent: 9-267473 (1997-10-01), None
patent: 2000-62161 (2000-02-01), None

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