Patent US3887928A successfully refreshed from Google Patents.
US3887928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink jet recording unit
Assignee: Ohno Res & Dev Lab
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Filing: 1973-11-23
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Granted: 1975-06-03
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Expires: 1993-11-23
Abstract
Abstract A recording unit is disclosed which is provided with a hollow, very small nozzle supplied with a liquid imaging material, an electrode plate having formed therein a through hole coaxial with the nozzle and disposed opposite to the tip of the nozzle and a ring of small diameter disposed on the nozzle coaxially therewith in the vicinity of its tip or between the nozzle and the electrode plate. A convergent or unfluctuated jet of the liquid imaging material produced by a voltage applied between the nozzle and the electrode plate disposed opposite thereto is directed through the through hole of the electrode plate to a recording member or medium placed adjacent to the electrode plate on the opposite side from the nozzle. The convergent jet of the liquid imaging material thus produced is made intermittent by applying a voltage to the ring, thereby to record images.
Inventors
- 👤 Genji Ohno
- 👤 Tadamitsu Uchiyama
- 👤 Seisaku Ohki
- 👤 Hishao Morohashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:22
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/015; B41J2/04; B41J2/06; B41J2002/061
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
254 words
A recording unit comprising: a. a hollow nozzle having an open end defining a tip for directing a jet of liquid imaging material from said nozzle; b. means for supplying a liquid imaging material to said nozzle; c. an electrode plate having a through hole and disposed opposite to said nozzle with said through hole being coaxial with said nozzle; d. means for disposing a recording member adjacent said electric plate on the opposite side from said nozzle; e. a ring having an inner diameter greater than the outer diameter of said nozzle disposed in close proximity to said nozzle tip and in coaxial relationship therewith; f. means for applying a voltage between said nozzle and electrode plate to create a first electric field therebetween having a high intensity, non-uniform component in the vicinity of said nozzle tip to form the liquid imaging material in said nozzle into a jet and to direct said jet through said through hole of said electrode plate to said recording member; and g. means for applying a voltage to said ring to generate a second electric field of the same polarity as the high intensity component of said first electric field in the vicinity of said nozzle tip to reduce the level of said high intensity component field and to impart uniformity to said high intensity component field thereby raising the voltage level at which jetting of said liquid imaging material from said nozzle tip occurs to interrupt said jet for recording an image on said recording member.
Claim 2
Dependent Claim
254 words
A recording unit comprising: a. a hollow nozzle having an open end defining a tip for directing a jet of liquid imaging material from said nozzle; b. means for supplying a liquid imaging material to said nozzle; c. an electrode plate having a through hole and disposed opposite to said nozzle with said through hole being coaxial with said nozzle; d. means for disposing a recording member adjacent said electric plate on the opposite side from said nozzle; e. a ring having an inner diameter greater than the outer diameter of said nozzle disposed in close proximity to said nozzle tip and in coaxial relationship therewith; f. means for applying a voltage between said nozzle and electrode plate to create a first electric field therebetween having a high intensity, non-uniform component in the vicinity of said nozzle tip to form the liquid imaging material in said nozzle into a jet and to direct said jet through said through hole of said electrode plate to said recording member; and g. means for applying a voltage to said ring to generate a second electric field of the same polarity as the high intensity component of said first electric field in the vicinity of said nozzle tip to reduce the level of said high intensity component field and to impart uniformity to said high intensity component field thereby raising the voltage level at which jetting of said liquid imaging material from said nozzle tip occurs to interrupt said jet for recording an image on said recording member.
Claim 3
Dependent Claim
254 words
A recording unit comprising: a. a hollow nozzle having an open end defining a tip for directing a jet of liquid imaging material from said nozzle; b. means for supplying a liquid imaging material to said nozzle; c. an electrode plate having a through hole and disposed opposite to said nozzle with said through hole being coaxial with said nozzle; d. means for disposing a recording member adjacent said electric plate on the opposite side from said nozzle; e. a ring having an inner diameter greater than the outer diameter of said nozzle disposed in close proximity to said nozzle tip and in coaxial relationship therewith; f. means for applying a voltage between said nozzle and electrode plate to create a first electric field therebetween having a high intensity, non-uniform component in the vicinity of said nozzle tip to form the liquid imaging material in said nozzle into a jet and to direct said jet through said through hole of said electrode plate to said recording member; and g. means for applying a voltage to said ring to generate a second electric field of the same polarity as the high intensity component of said first electric field in the vicinity of said nozzle tip to reduce the level of said high intensity component field and to impart uniformity to said high intensity component field thereby raising the voltage level at which jetting of said liquid imaging material from said nozzle tip occurs to interrupt said jet for recording an image on said recording member.
Claim 4
Dependent Claim
254 words
A recording unit comprising: a. a hollow nozzle having an open end defining a tip for directing a jet of liquid imaging material from said nozzle; b. means for supplying a liquid imaging material to said nozzle; c. an electrode plate having a through hole and disposed opposite to said nozzle with said through hole being coaxial with said nozzle; d. means for disposing a recording member adjacent said electric plate on the opposite side from said nozzle; e. a ring having an inner diameter greater than the outer diameter of said nozzle disposed in close proximity to said nozzle tip and in coaxial relationship therewith; f. means for applying a voltage between said nozzle and electrode plate to create a first electric field therebetween having a high intensity, non-uniform component in the vicinity of said nozzle tip to form the liquid imaging material in said nozzle into a jet and to direct said jet through said through hole of said electrode plate to said recording member; and g. means for applying a voltage to said ring to generate a second electric field of the same polarity as the high intensity component of said first electric field in the vicinity of said nozzle tip to reduce the level of said high intensity component field and to impart uniformity to said high intensity component field thereby raising the voltage level at which jetting of said liquid imaging material from said nozzle tip occurs to interrupt said jet for recording an image on said recording member.
Claim 5
Dependent Claim
35 words
A recording unit in accordance with claim 1 including a tubular member of insulating dielectric material disposed between said nozzle tip and said electrode plate and in coaxial relationship with said nozzle and said ring.
Claim 6
Dependent Claim
31 words
A recording unit in accordance with claim 2 including a tubular shield member of conductive material disposed exteriorly of said tubular member of insulating dielectric material and in coaxial relationship therewith.
Claim 7
Dependent Claim
20 words
A recording unit in accordance with claim 1 where said nozzle tip is disposed within the interior of said ring.
Claim 8
Dependent Claim
53 words
A recording unit in accordance with claim 1 including a resistor connected at one end to said ring and the other end to said means for applying voltage to said ring and a photoelectric switching element series connected at one end to said resistor one end and at the other end to ground.
Claim 9
Dependent Claim
88 words
A recording unit in accordance with claim 1 including a resistor connected at one end to said ring, a photoelectric switching element connected at one end to said ring, a switch selective movable between a first position for connecting said ring ring voltage applying means to the other end of said photoelectric switching element and the other end of said resistor to ground and a second position for connecting said ring voltage applying means to said resistor other end and said photoelectric switching element other end to ground.
Claim 10
Dependent Claim
57 words
A recording unit in accordance with claim 1 including a tubular shield member of conductive material disposed between the end portion of said nozzle adjacent said tip and said electric plate, a tubular resistor disposed within said shield member in contact therewith, said ring being disposed within the interior of said tubular resistor in conductive contact therewith.
Claim 11
Dependent Claim
38 words
A recording unit in accordance with claim 7 including a tubular member of insulating dielectric material disposed within said tubular resistor between the underside of said ring and said electrode plate and in contact with said tubular resistor.
Claim 12
Dependent Claim
18 words
A recording unit in accordance with claim 7 wherein said tubular resistor is connected to said electrode plate.
Claim 13
Dependent Claim
25 words
A recording unit in accordance with claim 1 including a resistor connected at one end to said ring and at the other end to ground.
Claim 14
Dependent Claim
37 words
A recording unit in accordance with claim 10 including a photoelectric switching elEment series connected at one end to said resistor one end and at the other end to said means for applying voltage to said ring.
Claim 15
Dependent Claim
62 words
A recording unit in accordance with claim 10 wherein the outer edge portion of said nozzle tip adjacent said open end is of arcuate shape having a radius of curvature less than 0.03 mm and wherein said nozzle tip is provided with a flat marginal end face contiguous to said arcuate outer edge portion having a width of less than 0.2 mm.
Claim 16
Dependent Claim
31 words
A recording unit in accordance with claim 12 wherein said liquid imaging material has a surface tension of between 20 - 30 dynes/cm and a viscosity of less than 200 centipoises.
Claim 17
Dependent Claim
44 words
A recording unit in accordance with claim 13 including a coating of liquid repellent material on said nozzle tip extending from the end opening in said nozzle tip to at least the circumferencially extending upper terminal edge of said nozzle arcuate outer edge portion.
Claim 18
Dependent Claim
26 words
A recording unit in accordance with claim 14 wherein said resistor connected between said ring and ground has a value of between 103 - 1010 ohms.
Claim 19
Dependent Claim
213 words
A recording unit for use with a liquid imaging material having a surface tension of 20 - 80 dynes/cm and a viscosity of less than 200 centipoises comprising, in combination: a. a hollow nozzle of relatively small diameter having an open end; b. an electrode member having a through hole and disposed opposite to said nozzle with said through hole being coaxial with said nozzle; c. a ring of relatively small diameter disposed at the tip of said nozzle in coaxial relationship therewith; d. means for applying a voltage between said nozzle and said electrode member to form a stream of said liquid imaging material into a jet and to direct said jet to a recording member disposed adjacent to said electrode member on the opposite side from said nozzle; e. means including an electric resistance member grounded at one end for applying a voltage to said ring to interrupt the jet to record an image on said recording member; and f. wherein the outer edge portion of said nozzle tip adjacent said open end is of arcuate shape having a radius of curvature less than 0.03mm and wherein said nozzle tip is provided with a flat marginal end face contiguous to said arcuate outer edge portion having a width less than 0.2mm.
Claim 20
Dependent Claim
213 words
A recording unit for use with a liquid imaging material having a surface tension of 20 - 80 dynes/cm and a viscosity of less than 200 centipoises comprising, in combination: a. a hollow nozzle of relatively small diameter having an open end; b. an electrode member having a through hole and disposed opposite to said nozzle with said through hole being coaxial with said nozzle; c. a ring of relatively small diameter disposed at the tip of said nozzle in coaxial relationship therewith; d. means for applying a voltage between said nozzle and said electrode member to form a stream of said liquid imaging material into a jet and to direct said jet to a recording member disposed adjacent to said electrode member on the opposite side from said nozzle; e. means including an electric resistance member grounded at one end for applying a voltage to said ring to interrupt the jet to record an image on said recording member; and f. wherein the outer edge portion of said nozzle tip adjacent said open end is of arcuate shape having a radius of curvature less than 0.03mm and wherein said nozzle tip is provided with a flat marginal end face contiguous to said arcuate outer edge portion having a width less than 0.2mm.
Claim 21
Dependent Claim
65 words
A recording unit in accordance with claim 16 wherein said arcuate outer edge portion of said nozzle terminates at its upper marginal edge in a joint disposed between said acurate outer edge portion and the outer peripheral surface of said nozzle and including a coating of liquid repellent material on said nozzle tip extending from the end opening in said nozzle tip to said joint.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |