The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 14, 2008
Filed:
Feb. 10, 2006
Masakazu Okuda, Ebina, JP;
Masakazu Okuda, Ebina, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A droplet ejection head driving method applies a driving voltage waveform to pressure-generating means, thus pressurizing a liquid in a pressure chamber and causing a droplet to be ejected. The driving voltage waveform includes a first voltage change process, which expands the pressure chamber, and a second voltage change process, after the first voltage change process, which shrinks the pressure chamber. A time interval between the first voltage change process and the second voltage change process is not more than ⅛ of a resonance period Tm of a meniscus oscillation (a refill oscillation), which is governed by surface tension of the liquid at a nozzle portion.
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