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US 6,604,816 B1Granted
Ink-jet recording head and ink-jet recorder
AssigneeHitachi, Ltd.
InventorsSeiji Yonekura, Yoshinobu Fukano, Mamoru Okano, Tatsuo Igawa, Kazuhito Masuda
Life of this patent
Estimating the term…
Abstract
The recording electrodes and the control electrodes of an ink jet recording head are alternately arranged on a substrate. Ink in which coloring material is distributed in a solvent is supplied to the recording electrode so that the ink can flow in the direction of the length of the recording electrode. An ink circulation part is provided for collecting surplus ink from the point of the recording electrode from which ink is discharged. As a result, an ink jet recorder, which can produce a high definition image without shifting the ink impact position on the recording medium, can be produced.
Claims32
An ink jet recording head comprising:
- a substrate,
- a plurality of recording electrodes arranged on said substrate,
- a plurality of control electrodes arranged so as to sandwich each of said recording electrodes,
- an ink circulation part for supplying ink which contains coloring material in solvent to said recording electrodes to flow it in a direction of length of said each recording electrode, and collecting said ink from a point of said each recording electrode.
1 more element
An ink jet recording head comprising:
- a substrate,
- a plurality of recording electrodes arranged on said substrate,
- a plurality of control electrodes arranged so as to sandwich each of said recording electrodes, and
- an ink circulation part having ink supply channel provided to flow ink which contains coloring material in solvent to said recording electrodes in a direction of length of said each recording electrode, and ink collection channel for collecting the ink from a point of said each recording electrode that said ink is discharged to the lower side of said each recording electrode,
- wherein the shape of ink meniscus formed in the vicinity of the point of said each recording electrode is controlled by giving the airflow directly to said ink meniscus.
2 more elements
An ink jet recording head comprising:
- a substrate,
- a plurality of recording electrodes arranged on said substrate,
- a plurality of control electrodes arranged so as to sandwich each of said recording electrodes, and
- an ink circulation part having ink supply channel provided to flow ink which contains coloring material in solvent to said recording electrodes in a direction of length of said each recording electrode, and ink collection channel for collecting the ink from a point of said each recording electrode that said ink is discharged to the lower side of said each recording electrode,
- wherein said ink collection channel passes air with ink which flows from the vicinity of the point of said each recording electrode.
2 more elements
An ink jet recording head comprising:
- a substrate,
- a plurality of recording electrodes arranged on said substrate,
- a plurality of control electrodes arranged so as to sandwich each of said recording electrodes, and
- an ink circulation part having ink supply channel provided to flow ink which contains coloring material in solvent to said recording electrodes in a direction of length of said each recording electrode, ink collection channel for collecting the ink from a point of said each recording electrode that said ink is discharged to the lower side of said each recording electrode, and ink flow modulating room for modulating an amount of the ink flow to said each recording electrode through said ink supply channel, and
- wherein said ink collection channel passes air with ink which flows from the vicinity of the point of said each recording electrode, and the ink from said ink flow modulating room to said plural recording electrodes is supplied according to a head difference by a position where said ink flow modulating room and said plural recording electrodes are arranged.
2 more elements
An ink jet recording head comprising:
- a substrate,
- a plurality of recording electrodes arranged on said substrate,
- a plurality of control electrodes arranged so as to sandwich each of said recording electrodes, and
- an ink circulation part having ink supply channel provided to flow ink which contains coloring material in solvent to said recording electrodes in a direction of length of said each recording electrode, and ink collection channel for collecting the ink from a point of said each recording electrode that said ink is discharged to a lower side of said each recording electrode along a part of said substrate,
- wherein said ink collection channel has a space provided with respect to said substrate to flow the ink and the air collected from said each recording electrode, and
- said space g is within the following range
- 100 μm≦g≦500 μm.
4 more elements
An ink jet recording head comprising:
- a plurality of recording electrodes arranged on a substrate,
- a plurality of control electrodes arranged so as to sandwich each of said recording electrodes, and
- an ink circulation part having ink supply channel provided to flow ink which contains coloring material in solvent to said recording electrodes in a direction of length of said each recording electrode, ink collection channel for collecting the ink from a point of said each recording electrode that said ink is discharged to a lower side of said each recording electrode, and ink flow modulating room for modulating an amount of the ink flow to said each recording electrode, and
- wherein a weight % of an insoluble material which includes the coloring material contained in an ink drop discharged from the point of said recording electrode is less than a weight % of the solvent.
1 more element
An ink jet recording head comprising:
- a plurality of recording electrodes arranged on a substrate,
- a plurality of control electrodes arranged so as to sandwich each of said recording electrodes,
- an ink circulation part having ink supply channel provided to flow ink which contains coloring material in solvent to said recording electrodes in a direction of length of said each recording electrode, ink collection channel for collecting the ink from a point of said each recording electrode that said ink is discharged to a lower side of said each recording electrode, and ink flow modulating room for modulating an amount of the ink flow to said each recording electrode, and
- a pulse voltage generation circuit for applying the pulse voltage to said plural recording electrodes, and
- wherein said substrate, said plural recording electrodes, said plural control electrodes, said pulse voltage generation circuit, and said ink circulation part are integrated together.
2 more elements
An ink jet recording head comprising:
- a plurality of recording electrodes arranged on a substrate,
- a plurality of control electrodes arranged so as to sandwich each of said recording electrodes,
- an ink circulation part having ink supply channel provided to flow ink which contains coloring material in solvent to said recording electrodes in a direction of length of said each recording electrode, ink collection channel for collecting the ink from a point of said each recording electrode that said ink is discharged to a lower side of said each recording electrode, and ink flow modulating room for modulating an amount of the ink flow to said each recording electrode,
- a bias supply for applying an electrode bias to said plural recording electrodes and said plural control electrodes,
- a pulse voltage generation circuit connected to each of said plural recording electrodes,
- a recording medium carrying passage for carrying a recording medium, and
- a common electrode opposed to said plural recording electrodes.
4 more elements
An ink jet recording head comprising:
- a substrate,
- a plurality of recording electrodes arranged on said substrate,
- a plurality of control electrodes arranged so as to sandwich each of said recording electrodes,
- an ink circulation part for supplying ink which contains coloring material in solvent to said recording electrodes to flow the ink in a direction of a length of respective ones of said recording electrodes and for collecting the ink from a tip of respective ones of the recording electrodes, said ink circulation part including ink channels provided for each recording electrode, the ink channels being at least partially delimited by shrouds.
1 more element
Dependencies are inferred from the claim text.