Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2007-07-27
2011-12-27
Feggins, Kristal (Department: 2861)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
Reexamination Certificate
active
08083327
ABSTRACT:
A print head pump assembly has a piezo element plate having an array of piezoelectric elements, a channel plate having an array of channel regions corresponding to the array of piezoelectric elements, and a valve plate having an array of reed valve pairs corresponding to the array of channel regions. A print head assembly has at least one ink reservoir, an upper routing plate to receive ink from the ink reservoir, a lower routing plate to direct ink out of the print head, and a pump assembly to draw ink from the upper routing plate and deliver ink to the lower routing plate using piezoelectric diaphragms. A method of delivering ink to a print substrate includes providing ink to a low-pressure reservoir of a print head, drawing ink out of the low-pressure reservoir through an upper routing plate using a pump assembly internal to the print head, and pumping ink out of the print head through a lower routing plate using the pump assembly, such that the drawing and pumping processes continuously alternate.
REFERENCES:
patent: 4882596 (1989-11-01), Tsuzuki et al.
patent: 5371529 (1994-12-01), Eguchi et al.
patent: 7837306 (2010-11-01), Fujishiro
patent: 2006/0152557 (2006-07-01), Silverbrook et al.
Bitz Brian D.
Domoto Gerald A.
Edwards Kirk S.
Leighton Roger G.
Feggins Kristal
Marger & Johnson & McCollom, P.C.
Xerox Corporation
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