Ink-jet recording system using electrostatic force to expel ink
First Claim
1. An ink jet recording device for applying a static electric force in an ink to cause an ink particle to fly onto a recording medium for recording, the ink jet recording device comprising:
- a control electrode substrate including an insulating substrate arranged to face the recording medium, a through hole which is passed through said insulating substrate for ejecting and flying said ink particle toward said recording medium, and a control electrode provided near said through hole to apply the static electric force to the ink;
ink supply means for supplying ink into said through hole of said control electrode substrate;
voltage applying means for applying a voltage to said control electrode;
an ink guide, which is arranged substantially at a center of said through hole of said insulating substrate and said control electrode and which has a tip portion serving as an ink-droplet flying position, said tip portion projecting from an upper surface of said control electrode or said insulating substrate toward said recording medium;
whereinsaid ink guide comprises a flat base portion facing said control electrode substrate and a plurality of projecting portions, each of which projects in an ink flying direction from said base portion at a position facing a corresponding through hole for allowing the ink to fly out of the tip of the projecting portion;
whereinsaid projecting portion of said ink guide projects in an ink flying direction from the through hole of said insulating substrate and said control electrode, and said projecting portion has a tip portion having inclined planes toward both sides;
whereinsaid projecting portion of said ink guide has a flat plane which is arranged to join said included planes to one another.
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Accused Products
Abstract
An ink jet recording device for applying an electric force to an ink to cause an ink particle to fly onto a recording medium for recording, comprises: a control substrate arranged so as to face the recording medium, said control substrate comprising an insulating supporting substrate, and first and second control electrodes arranged on both sides of the insulating supporting substrate, said control substrate having at least one through hole which passes through said first and second control electrodes and said insulating supporting substrate; ink supply source for supplying an ink into said through hole of said control substrate; and signal voltage supply source for applying a signal voltage between said first and second control electrodes, in accordance with a picture signal for causing an ink particle to fly out of said through hole toward said recording medium.
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Citations
45 Claims
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1. An ink jet recording device for applying a static electric force in an ink to cause an ink particle to fly onto a recording medium for recording, the ink jet recording device comprising:
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a control electrode substrate including an insulating substrate arranged to face the recording medium, a through hole which is passed through said insulating substrate for ejecting and flying said ink particle toward said recording medium, and a control electrode provided near said through hole to apply the static electric force to the ink; ink supply means for supplying ink into said through hole of said control electrode substrate; voltage applying means for applying a voltage to said control electrode; an ink guide, which is arranged substantially at a center of said through hole of said insulating substrate and said control electrode and which has a tip portion serving as an ink-droplet flying position, said tip portion projecting from an upper surface of said control electrode or said insulating substrate toward said recording medium;
whereinsaid ink guide comprises a flat base portion facing said control electrode substrate and a plurality of projecting portions, each of which projects in an ink flying direction from said base portion at a position facing a corresponding through hole for allowing the ink to fly out of the tip of the projecting portion;
whereinsaid projecting portion of said ink guide projects in an ink flying direction from the through hole of said insulating substrate and said control electrode, and said projecting portion has a tip portion having inclined planes toward both sides;
whereinsaid projecting portion of said ink guide has a flat plane which is arranged to join said included planes to one another.
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2. An ink jet recording device for applying a static electric force in an ink to cause an ink particle to fly onto a recording medium for recording, the ink jet recording device comprising:
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a control electrode substrate including an insulating substrate arranged to face the recording medium, a through hole which is passed through said insulating substrate for ejecting and flying said ink article toward said recording medium, and a control electrode provided near said through hole to apply the static electric force to the ink; ink supply means for supplying ink into said through hole of said control electrode substrate; voltage applying means for applying a voltage to said control electrode; an ink guide, which is arranged substantially at a center of said through hole of said insulating substrate and said control electrode and which has a tip portion serving as an ink-droplet flying position, said tip portion projecting from an upper surface of said control electrode or said insulating substrate toward said recording medium, said ink guide includes a protecting member which projects closer toward said recording medium than a tip surface of said projecting portion of said ink guide.
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3. An ink jet recording device for applying a static electric force in an ink to cause an ink particle to fly onto a recording medium for recording, the ink jet recording device comprising:
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a control electrode substrate including an insulating substrate arranged to face the recording medium, a through hole which is passed through said insulating substrate for ejecting and flying said ink particle toward said recording medium, and a control electrode provided near said through hole to apply the static electric force to the ink; ink supply means for supplying ink into said through hole of said control electrode substrate; voltage applying means for applying a voltage to said control electrode;
wherein said voltage applying means comprises signal voltage apply means for applying a signal voltage corresponding to an image signal for flying said ink droplet from said through holes toward said recording medium, and bias voltage applying means for applying a bias voltage between said first and second control electrodes for accelerating the flying ink particle, wherein when the surface potential of said recording medium is Vm, a voltage of said signal voltage for causing an ion particle to fly is V1on, a voltage of said signal voltage for causing the ion particle not to fly is V1off, and said bias voltage is V2, restrictions on V2 include
space="preserve" listing-type="equation">Vm<
V2<
V1off and Vm<
V1on<
V2.4.
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4. An ink jet recording device for applying a static electric force in an ink to cause an ink particle to fly onto a recording medium for recording, the ink jet recording device comprising:
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a control electrode substrate including an insulating substrate arranged to face the recording medium, a through hole which is passed through said insulating substrate for ejecting and flying said ink particle toward said recording medium, and a control electrode provided near said through hole to apply the static electric force to the ink; ink supply means for supplying ink into said through hole of said control electrode substrate; voltage applying means for applying a voltage to said control electrode;
wherein said voltage applying means comprises signal voltage apply means for applying a signal voltage corresponding to an image signal for flying said ink droplet from said through holes toward said recording medium, and bias voltage applying means for applying a bias voltage between said first and second control electrodes for accelerating the flying ink particle, wherein when a surface potential of said recording medium is Vm, a voltage of said signal voltage for causing an ion particle to fly is V1on, a voltage of said signal voltage for causing the ion particle not to fly is V1off, and said bias voltage is V2, restrictions on V2 include
space="preserve" listing-type="equation">Vm<
V1off<
V2 and Vm<
V2<
V1on.5.
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5. The ink jet recording system for applying a electrostatic force to an ink containing a coloring material dispersed in a solvent to cause an ink droplet to fly onto a recording medium for recording, the ink jet recording system comprising:
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a control electrode substrate including an insulating substrate having a common surface arranged to face the recording medium, a plurality of through holes arranged in a row and passing at a right angle through said common surface of the insulating substrate for emitting said ink droplet toward said recording medium, and a first control electrode and a second control electrode which are provided on both surfaces around each of said plurality of through holes of said insulating substrate, respectively; ink supply means for supplying an ink into each of said plurality through holes of said control electrode substrate; and voltage applying means for applying a voltage to said first and second control electrodes to have the electrostatic force, wherein said voltage applying means comprises signal voltage applying means for applying a signal voltage corresponding to a recording signal for emitting said ink droplet from said through holes toward said recording medium, and bias voltage applying means for applying a predetermined bias voltage for flying said ink droplet from said through holes toward said recording medium, wherein when a surface potential of said recording medium is Vm, a voltage of said signal voltage for causing the ink droplet to fly is V1on, a voltage of said signal voltage for causing the ink droplet not to fly is V1off, and said bias voltage is V2, restrictions on V2 include
space="preserve" listing-type="equation">Vm<
V2<
V1off, and Vm<
V1on<
V2.6.
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6. The ink jet recording system for applying a electrostatic force to an ink containing a coloring material dispersed in a solvent to cause an ink droplet to fly onto a recording medium for recording, the ink jet recording system comprising:
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a control electrode substrate including an insulating substrate having a common surface arranged to face the recording medium, a plurality of through holes arranged in a row and passing at a right angle through said common surface of the insulating substrate for emitting said ink droplet toward said recording medium, and a first control electrode and a second control electrode which are provided on both surfaces around each of said plurality of through holes of said insulating substrate, respectively; ink supply means for supplying an ink into each of said plurality through holes of said control electrode substrate; and voltage applying means for applying a voltage to said first and second control electrodes to have the electrostatic force, wherein said voltage applying means comprises signal voltage applying means for applying a signal voltage corresponding to a recording signal for emitting said ink droplet from said through holes toward said recording medium, and bias voltage applying means for applying a predetermined bias voltage for flying said ink droplet from said through holes toward said recording medium, wherein when a surface potential of said recording medium is Vm, a voltage of said signal voltage for causing the ink droplet to fly is V1on, a voltage of said signal voltage for causing the ink droplet not to fly is V1off, and said bias voltage is V2, restrictions on V2 include
space="preserve" listing-type="equation">Vm<
V1offs≦
V2, and Vm<
V2<
V1on.7.
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7. An ink jet recording system for applying an electrostatic force to an ink containing a coloring material dispersed in a solvent to cause an ink droplet to fly onto a recording medium for recording, the ink jet recording system comprising:
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a control electrode substrate including an insulating substrate having a common surface arranged to face the recording medium, a plurality of through holes arranged in a row and passing at a right angle through said common surface of the insulating substrate for emitting said ink droplet toward said recording medium, and a control electrode provided near each of said through holes for causing said electrostatic force to act on said ink; an ink guide arranged at said through hole of said control electrode substrate, and having a tip portion serving as an ink-droplet emitting position, said tip portion projecting from an upper surface of said control electrode substrate toward said recording medium at least when emitting the ink; ink supply means for supplying an ink into said through holes of said control electrode substrate; and voltage applying means for applying a voltage to said control electrode to generate the electrostatic force. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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Specification