US4296421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink jet recording device using thermal propulsion and mechanical pressure changes
Assignee: Canon Inc
•
Filing: 1979-10-24
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Granted: 1981-10-20
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Expires: 1999-10-24
Abstract
Abstract A device for recording comprising ejecting a liquid recording medium by heat energy which comprises a recording head composed of a discharging orifice for ejecting the liquid recording medium in a form of droplets, an inlet for introducing the liquid recording medium, a liquid chamber for holding the liquid recording medium, and a heating element for applying heat energy to the liquid recording medium in the liquid chamber, and a means for applying voltage pulse to control heating by the heating element, the distance between the surface of the heating element and the liquid recording medium being not more that 100 microns.
Inventors
- 👤 Toshitami Hara
- 👤 Yashushi Sato
- 👤 Yasushi Takatori
- 👤 Yoshiaki Shirato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:35
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/14; B41J2/14016; B41J2/14032; B41J2/1404; B41J2/1408; B41J2/14088; B41J2/14112; B41J2/14129; B41J2/14201; B41J2/1433; B41J2/16; B41J2/1606; B41J2002/14379; B41J2002/14387; B41J2202/00; B41J2202/01; B41J2202/03
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
143 words
A device for recording comprising ejecting a liquid recording medium by heat energy which comprises a recording head composed of a discharging orifice for ejecting the liquid recording medium in a form of droplets, an inlet for introducing the liquid recording medium, a liquid chamber for holding the liquid recording medium, and a heating element for applying heat energy to the liquid recording medium in the liquid chamber, and a means for generating a mechanical pressure change in the liquid recording medium flowing into the liquid chamber, a means for synchronizing the application of heat energy to the liquid recording medium with the generation of the mechanical pressure change, and a means for applying voltage pulse to control heating by the heating element, the distance between the surface of the heating element and the liquid recording medium being not more than 100 microns.
Claim 2
Independent Claim
143 words
A device for recording comprising ejecting a liquid recording medium by heat energy which comprises a recording head composed of a discharging orifice for ejecting the liquid recording medium in a form of droplets, an inlet for introducing the liquid recording medium, a liquid chamber for holding the liquid recording medium, and a heating element for applying heat energy to the liquid recording medium in the liquid chamber, and a means for generating a mechanical pressure change in the liquid recording medium flowing into the liquid chamber, a means for synchronizing the application of heat energy to the liquid recording medium with the generation of the mechanical pressure change, and a means for applying voltage pulse to control heating by the heating element, the distance between the surface of the heating element and the liquid recording medium being not more than 100 microns.
Claim 3
Dependent Claim
20 words
A device according to claim 1 in which the means for generating a mechanical pressure change comprises an electromechanical transducer.
Claim 4
Dependent Claim
17 words
A device according to claim 1 in which the heating element contains a heat generating resistor layer.
Claim 5
Dependent Claim
18 words
A device according to claim 1 in which the heating element is a thin film resistive heater element.
Claim 6
Dependent Claim
22 words
A device according to claim 1 in which a protecting film is intervened between the heating element and the liquid recording medium.
Claim 7
Independent Claim
155 words
A device for recording comprising ejecting a liquid recording medium by heat energy which comprises a recording head composed of a discharging orifice for ejecting the liquid recording medium in a form of droplets, an inlet for introducing the liquid recording medium, a liquid chamber for holding the liquid recording medium, and a heating element for applying heat energy to the liquid recording medium in the liquid chamber, a means for generating mechanical pressure changes in the liquid recording medium flowing into the liquid chamber, a means for synchronizing the application of heat energy to the liquid recording medium with the generation of the mechanical pressure change, a means for applying voltage pulse to control heating by the heating element, the heating element being immersed in the liquid recording medium in the liquid chamber, and the distance between the surface of the heating element and the liquid recording medium being not more than 100 microns.
Claim 8
Independent Claim
155 words
A device for recording comprising ejecting a liquid recording medium by heat energy which comprises a recording head composed of a discharging orifice for ejecting the liquid recording medium in a form of droplets, an inlet for introducing the liquid recording medium, a liquid chamber for holding the liquid recording medium, and a heating element for applying heat energy to the liquid recording medium in the liquid chamber, a means for generating mechanical pressure changes in the liquid recording medium flowing into the liquid chamber, a means for synchronizing the application of heat energy to the liquid recording medium with the generation of the mechanical pressure change, a means for applying voltage pulse to control heating by the heating element, the heating element being immersed in the liquid recording medium in the liquid chamber, and the distance between the surface of the heating element and the liquid recording medium being not more than 100 microns.
Claim 9
Dependent Claim
20 words
A device according to claim 6 in which the means for generating a mechanical pressure change comprises an electromechanical transducer.
Claim 10
Dependent Claim
17 words
A device according to claim 6 in which the heating element contains a heat generating resistor layer.
Claim 11
Dependent Claim
18 words
A device according to claim 6 in which the heating element is a thin film resistive heater element.
Claim 12
Dependent Claim
22 words
A device according to claim 6 in which a protecting film is intervened between the heating element and the liquid recording medium.
Claim 13
Independent Claim
130 words
A device for recording comprising ejecting a liquid recording medium by heat energy which comprises a recording head composed of a discharging orifice for ejecting the liquid recording medium in a form of droplets, an inlet for introducing the liquid recording medium, a liquid chamber for holding the liquid recording medium, and a heating element for applying heat energy to the liquid recording medium in a liquid chamber, and a means for generating a mechanical pressure change in the liquid recording medium flowing into the liquid chamber, a means for synchronizing the application of heat energy to the liquid recording medium with the generation of the mechanical pressure change, and the distance between the surface of the heating element and the liquid recording medium being not more than 100 microns.
Claim 14
Independent Claim
130 words
A device for recording comprising ejecting a liquid recording medium by heat energy which comprises a recording head composed of a discharging orifice for ejecting the liquid recording medium in a form of droplets, an inlet for introducing the liquid recording medium, a liquid chamber for holding the liquid recording medium, and a heating element for applying heat energy to the liquid recording medium in a liquid chamber, and a means for generating a mechanical pressure change in the liquid recording medium flowing into the liquid chamber, a means for synchronizing the application of heat energy to the liquid recording medium with the generation of the mechanical pressure change, and the distance between the surface of the heating element and the liquid recording medium being not more than 100 microns.
Claim 15
Dependent Claim
20 words
A device according to claim 11 in which the means for generating a mechanical pressure change comprises an electromechanical transducer.
Claim 16
Dependent Claim
17 words
A device according to claim 11 in which the heating element contains a heat generating resistor layer.
Claim 17
Dependent Claim
18 words
A device according to claim 11 in which the heating element is a thin film resistive heater element.
Claim 18
Dependent Claim
22 words
A device according to claim 11 in which a protecting film is intervened between the heating element and the liquid recording medium.
Claim 19
Independent Claim
142 words
A device for recording comprising ejecting a liquid recording medium by heat energy which comprises a recording head composed of a discharging orifice for ejecting the liquid recording medium in a form of droplets, an inlet for introducing the liquid recording medium, a liquid chamber for holding the liquid recording medium, and a heating element for applying heat energy to the liquid recording medium in the liquid chamber, a means for generating mechanical pressure changes in the liquid recording medium flowing into the liquid chamber, a means for synchronizing the application of heat energy to the liquid recording medium with the generation of the mechanical pressure change, the heating element being immersed in the liquid recording medium in the liquid chamber, and the distance between the surface of the heating element and the liquid recording medium being not more than 100 microns.
Claim 20
Independent Claim
142 words
A device for recording comprising ejecting a liquid recording medium by heat energy which comprises a recording head composed of a discharging orifice for ejecting the liquid recording medium in a form of droplets, an inlet for introducing the liquid recording medium, a liquid chamber for holding the liquid recording medium, and a heating element for applying heat energy to the liquid recording medium in the liquid chamber, a means for generating mechanical pressure changes in the liquid recording medium flowing into the liquid chamber, a means for synchronizing the application of heat energy to the liquid recording medium with the generation of the mechanical pressure change, the heating element being immersed in the liquid recording medium in the liquid chamber, and the distance between the surface of the heating element and the liquid recording medium being not more than 100 microns.
Claim 21
Dependent Claim
20 words
A device according to claim 16 in which the means for generating a mechanical pressure change comprises an electromechanical transducer.
Claim 22
Dependent Claim
17 words
A device according to claim 16 in which the heating element contains a heat generating resistor layer.
Claim 23
Dependent Claim
18 words
A device according to claim 16 in which the heating element is a thin film resistive heater element.
Claim 24
Dependent Claim
22 words
A device according to claim 16 in which a protecting film is intervened between the heating element and the liquid recording medium.
Claim 25
Dependent Claim
54 words
A device according to claim 11 or 16, in which the ratio of the opening area of the discharging orifice to the inner cross sectional area of the liquid chamber perpendicular to the flow channel of the liquid recording medium at a portion where the heating element is disposed ranges from 1/10 to 10/1.
Claim 26
Dependent Claim
41 words
A device according to claim 11 or 16, in which a water repellent or an oil repellent treatment is applied to a portion of the liquid chamber wall between the discharging orifice and a portion where the heating element is disposed.
Claim 27
Dependent Claim
17 words
A device according to claim 11 or 16, in which the heating element comprises an electrothermal transducer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |