Liquid ejection apparatus
AssigneeSeiko Epson Corporation
InventorSeiya Sato
Life of this patent
Estimating the term…
Abstract
A liquid ejection apparatus for accurately supplying a plurality of nozzle rows with liquid having an adjustable hydrodynamic flow pressure to eject the liquid. Black ink, cyan ink, magenta ink, and yellow ink are supplied to first to fourth valve units through first to fourth branch passages. Each ink is then supplied to nozzle rows of a recording head after the hydrodynamic flow pressure of the ink is adjusted. The hydrodynamic flow pressure of the ink supplied to each nozzle row is prevented from fluctuating. The liquid ejection apparatus accurately ejects ink from each nozzle row and improves the reliability of performing recording on a recording sheet.
Claims10
A liquid ejection apparatus for ejecting liquid contained in a liquid source, the liquid ejection apparatus comprising:
- a supply passage connected to the liquid source;
- a liquid ejection head connected to the supply passage and including a plurality of nozzles for ejecting the liquid, wherein the plurality of nozzles form a plurality of nozzle rows;
- a plurality of branch passages, connected to the supply passage, for receiving the liquid from the supply passage and supplying the liquid to two or more of the plurality of nozzle rows;
- and
- a hydrodynamic flow pressure adjusting unit that adjusts hydrodynamic flow pressure of the liquid flowing through each branch passage.
A liquid ejection apparatus for use with a plurality of liquid sources respectively containing liquids, the liquid ejection apparatus comprising:
- a reciprocally moveable carriage remote from the liquid sources;
- a plurality of liquid passages respectively connected to the plurality of liquid sources, wherein the liquids respectively flow through the plurality of liquid passages;
- a plurality of branch passages respectively connected to the plurality of liquid passages, wherein each of the liquids flows through at least two of the branch passages;
- a liquid ejection head supported by the reciprocally moveable carriage and including a plurality of nozzle rows respectively connected to the plurality of branch passages, the at least two of the branch passages respectively being connected to at least two of the nozzle rows, and one of the liquids being ejected from the at least two of the nozzle rows;
- and
- a plurality of valve units supported by the reciprocally moveable carriage and respectively associated with the plurality of branch passages, wherein each of the plurality of valve units adjusts hydrodynamic flow pressure of the liquid flowing through the associated branch passage.
Dependencies are inferred from the claim text.