Liquid droplet ejecting method, liquid droplet ejection apparatus, inkjet recording apparatus, production method of fine particles, fine particle production apparatus, and toner
AssigneeRicoh Company, Ltd.
InventorsYoshihiro Norikane, Haruo Nakamura, Masaru Ohgaki, Yuko Sekiguchi
Life of this patent
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Abstract
A liquid droplet ejecting method for ejecting a liquid from at least one ejection hole to form the liquid into liquid droplets, the method including: applying a vibration to the liquid in a liquid column resonance-generating liquid chamber, in which the ejection hole is formed, to form a standing wave through liquid column resonance, and ejecting the liquid from the ejection hole, which is formed in a region corresponding to an antinode of the standing wave, to form the liquid into liquid droplets.
Claims12
A liquid droplet ejecting method, the method comprising:
- applying a vibration to a liquid in a liquid column resonance-generating liquid chamber, in which an ejection hole is formed, to form a standing wave through liquid column resonance;
- wherein the vibration applied to the liquid has a frequency f satisfying Equation (2):
- N×c/(4L)≦f≦N×c/(4Le) (2);
- L represents a length of the liquid column resonance-generating liquid chamber in a longitudinal direction thereof;
- Le represents a distance between an end of the liquid column resonance-generating liquid chamber on a liquid feed path side and a center part of the ejection hole nearest to the end of the liquid column resonance-generating liquid chamber;
- c represents a sound speed of the liquid;
- and
- N is a natural number;
- and wherein the Le and L satisfy Le/L>0.6;
- and
- ejecting the liquid from the ejection hole, which is formed in a region corresponding to an antinode of the standing wave, to form liquid droplets.
A liquid droplet ejection apparatus comprising:
- a liquid column resonance-generating liquid chamber in a part of which an ejection hole is formed;
- and
- a vibration generating unit configured to apply a vibration to a liquid,
- wherein the vibration is applied to the liquid in the liquid column resonance-generating liquid chamber by the vibration generating unit to form a standing wave through liquid column resonance, and the liquid is ejected from the ejection hole corresponding to an antinode of the standing wave;
- wherein the vibration applied to the liquid has a frequency f satisfying Equation (2):
- N×c/(4L)≦f≦N×c/(4Le) (2);
- L represents a length of the liquid column resonance-generating liquid chamber in a longitudinal direction thereof;
- Le represents a distance between an end of the liquid column resonance-generating liquid chamber on a liquid feed path side and a center part of the ejection hole nearest to the end of the liquid column resonance-generating liquid chamber;
- c represents a sound speed of the liquid;
- and
- N is a natural number;
- and wherein the Le and L satisfy Le/L>0.6.
Dependencies are inferred from the claim text.