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US 11,207,888 B2Granted
Liquid discharge head including supply and discharge channels, liquid discharge device, and liquid discharge apparatus
AssigneeRicoh Company, Ltd.
InventorsJunichi Iwata, Takahiro Yoshida, Yukio Otome, Tomoaki Murakami
Life of this patent
Estimating the term…
Abstract
A liquid discharge head includes a nozzle to discharge a liquid, an individual chamber communicating with the nozzle, a supply channel communicating with the individual chamber to supply the liquid to the individual chamber, and a discharge channel communicating with the individual chamber to discharge the liquid in the individual chamber. A fluid resistance of the supply channel is greater than a fluid resistance of the discharge channel.
Claims21
A liquid discharge head;
- comprising:
- a nozzle to discharge a liquid in a nozzle discharge direction in which the liquid flows out of the nozzle;
- a nozzle communication channel communicating with the nozzle;
- an individual chamber communicating with the nozzle communication channel;
- a supply channel communicating with the individual chamber to supply the liquid to the individual chamber;
- a supply-side common chamber communicating with the supply channel;
- a discharge channel communicating with the nozzle communication channel to discharge the liquid in the individual chamber and the nozzle communication channel and extending downstream from the nozzle in a direction of flow of the liquid;
- and
- a discharge-side common chamber communicating with the discharge channel,
- wherein a total fluid resistance from the supply-side common chamber to the nozzle communication channel, including the supply-side common chamber, the supply channel, and the nozzle communication channel, is greater than a fluid resistance from the discharge channel to the discharge-side common chamber, including the discharge channel and the discharge-side common chamber.
7 more elements
A liquid discharge head, comprising:
- a nozzle to discharge a liquid in a nozzle discharge direction in which the liquid flows out of the nozzle;
- a nozzle communication channel communicating with the nozzle;
- an individual chamber communicating with the nozzle communication channel;
- a supply channel communicating with the individual chamber to supply the liquid to the individual chamber;
- a supply-side common chamber communicating with the supply channel;
- a supply port communicating with the supply-side common chamber to supply the liquid to the supply-side common chamber;
- a discharge channel communicating with the nozzle communication channel;
- a discharge-side common chamber communicating with the discharge channel;
- and
- a discharge port communicating with the discharge-side common chamber to discharge the liquid outside the liquid discharge head from the discharge-side common chamber,
- wherein a total fluid resistance from the supply port to the nozzle communication channel, including the supply-side common chamber, the supply channel, the individual chamber, and the nozzle communication channel, is greater than a total fluid resistance from the discharge channel to the discharge port, including the discharge channel and the discharge-side common chamber.
8 more elements
A liquid discharge head, comprising:
- a nozzle to discharge a liquid in a nozzle discharge direction in which the liquid flows out of the nozzle;
- a nozzle communication channel communicating with the nozzle;
- an individual chamber communicating with the nozzle communication channel;
- a first communicating channel communicating with the individual chamber to supply the liquid to the individual chamber;
- and
- second communicating channel communicating with the nozzle communication channel to discharge the liquid in the individual chamber and the nozzle communication channel,
- wherein the first communication channel includes a supply-side fluid restrictor having a cross-sectional area smaller than the individual chamber,
- the second communication channel includes a discharge-side fluid restrictor having a cross-sectional area smaller than the nozzle communication channel, and
- a total fluid resistance of the first communication channel Rin, including the supply-side fluid restrictor, the individual chamber, and the nozzle commination channel, and a total fluid resistance of the second communication channel Rout, including the discharge-side fluid restrictor, satisfy a relation Rin>Rout.
6 more elements
Dependencies are inferred from the claim text.