US4349830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conical nozzle for an electrostatic ink jet printer
Assignee: Unisys Corp
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Filing: 1980-11-12
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Granted: 1982-09-14
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Expires: 2000-11-12
Abstract
Abstract An improved ink jet nozzle for an electrostatic printer comprising a fine pipe for feeding ink therethrough onto a separately positioned piece of paper under the control of an electric field, the end of the pipe nearest the paper having a conical configuration which provides shortened tube length for increased ink flow and reduced nozzle diameter for improved frequency response.
Inventors
- 👤 Robert E. Rudd, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:25
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/015; B41J2/04; B41J2/06
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
175 words
An electrostatic ink jet system comprising: ink supply means for containing a supply of ink; an ink jet nozzle mounted on said ink supply means, said ink jet nozzle including a fine pipe having a longitudinal channel for feeding said ink therethrough into a separately positioned piece of paper under control of an electric field, the end of said pipe nearest the paper having a conical configuration, the portion of said pipe adjacent to said conical configuration having a tubular configuration, an oriface passing through the tip of the conical configuration, the wall of said oriface being parallel with the axis of said longitudinal channel, the diameter of the longitudinal channel increasing between the tip of said conical configuration and the end of said tubular configuration adjacent to said conical configuration, the inner surface of said conical configuration forming an angle of approximately 49.3° with the axis of said longitudinal channel; said piece of paper mounted on a conductive platen; and wherein said electric field is applied between said platen and said ink jet nozzle.
Claim 2
Dependent Claim
175 words
An electrostatic ink jet system comprising: ink supply means for containing a supply of ink; an ink jet nozzle mounted on said ink supply means, said ink jet nozzle including a fine pipe having a longitudinal channel for feeding said ink therethrough into a separately positioned piece of paper under control of an electric field, the end of said pipe nearest the paper having a conical configuration, the portion of said pipe adjacent to said conical configuration having a tubular configuration, an oriface passing through the tip of the conical configuration, the wall of said oriface being parallel with the axis of said longitudinal channel, the diameter of the longitudinal channel increasing between the tip of said conical configuration and the end of said tubular configuration adjacent to said conical configuration, the inner surface of said conical configuration forming an angle of approximately 49.3° with the axis of said longitudinal channel; said piece of paper mounted on a conductive platen; and wherein said electric field is applied between said platen and said ink jet nozzle.
Claim 3
Dependent Claim
22 words
The electrostatic ink jet system in accordance with claim 1 wherein the oriface is centered at the vertex of said conical configuration.
Claim 4
Dependent Claim
24 words
The electrostatic ink jet system in accordance with claim 1 wherein the diameter of the longitudinal channel in said tubular configuration is substantially constant.
Claim 5
Dependent Claim
77 words
The electrostatic ink jet system in accordance with claim 1 wherein the tip of said conical configuration is cut away along a perpendicular plane with respect to the longitudinal axis of said channel, said conical configuration further being cut away beginning at the intersection of said perpendicular plane with the outer surface of said conical configuration and extending longitudinally through the walls of said conical configuration along a plane parallel with the longitudinal axis of said channel.
Claim 6
Dependent Claim
31 words
The electrostatic ink jet nozzle in accordance with claim 1 wherein the outer surface of said conical configuration forms an angle of approximately 49.3° with the axis of said longitudinal channel.
Claim 7
Dependent Claim
20 words
The electrostatic ink jet system in accordance with claim 1 wherein the oriface has a diameter of approximately 0.004 inch.
Claim 8
Dependent Claim
19 words
The electrostatic ink jet system in accordance with claim 1 wherein said ink jet nozzle is made of metal.
Claim 9
Dependent Claim
24 words
The electrostatic ink jet system in accordance with claim 1 wherein the wall of said conical configuration has a thickness of approximately 0.002 inch.
Claim 10
Dependent Claim
32 words
The electrostatic ink jet system in accordance with claim 1 wherein the end of the tubular configuration which is not adjacent to the conical configuration is mounted to said ink supply means.
Claim 11
Dependent Claim
175 words
An electrostatic ink jet system comprising: ink supply means for containing a supply of ink; an ink jet nozzle mounted on said ink supply means, said ink jet nozzle including a fine pipe having a longitudinal channel for feeding said ink therethrough onto a separately positioned piece of paper under control of an electric field, the end of said pipe nearest the paper having a conical configuration, the portion of said pipe adjacent to said conical configuration having a tubular configuration, an oriface passing through the tip of the conical configuration, the wall of said oriface being parallel with the axis of said longitudinal channel, the diameter of the longitudinal channel increasing between the tip of said conical configuration and the end of said tubular configuration adjacent to said conical configuration, the outer surface of said conical configuration forming an angle of approximately 49.3° with the axis of said longitudinal channel; said piece of paper mounted on a conductive platen; and wherein said electric field is applied between said platen and said ink jet nozzle.
Claim 12
Dependent Claim
175 words
An electrostatic ink jet system comprising: ink supply means for containing a supply of ink; an ink jet nozzle mounted on said ink supply means, said ink jet nozzle including a fine pipe having a longitudinal channel for feeding said ink therethrough onto a separately positioned piece of paper under control of an electric field, the end of said pipe nearest the paper having a conical configuration, the portion of said pipe adjacent to said conical configuration having a tubular configuration, an oriface passing through the tip of the conical configuration, the wall of said oriface being parallel with the axis of said longitudinal channel, the diameter of the longitudinal channel increasing between the tip of said conical configuration and the end of said tubular configuration adjacent to said conical configuration, the outer surface of said conical configuration forming an angle of approximately 49.3° with the axis of said longitudinal channel; said piece of paper mounted on a conductive platen; and wherein said electric field is applied between said platen and said ink jet nozzle.
Claim 13
Dependent Claim
22 words
The electrostatic ink jet system in accordance with claim 10 wherein the oriface is centered at the vertex of said conical configuration.
Claim 14
Dependent Claim
24 words
The electrostatic ink jet system in accordance with claim 10 wherein the diameter of the longitudinal channel in said tubular configuration is substantially constant.
Claim 15
Dependent Claim
77 words
The electrostatic ink jet system in accordance with claim 10 wherein the tip of said conical configuration is cut away along a perpendicular plane with respect to the longitudinal axis of said channel, said conical configuration further being cut away beginning at the intersection of said perpendicular plane with the outer surface of said conical configuration and extending longitudinally through the walls of said conical configuration along a plane parallel with the longitudinal axis of said channel.
Claim 16
Dependent Claim
20 words
The electrostatic ink jet system in accordance with claim 10 wherein the oriface has a diameter of approximately 0.004 inch.
Claim 17
Dependent Claim
19 words
The electrostatic ink jet system in accordance with claim 10 wherein said ink jet nozzle is made of metal.
Claim 18
Dependent Claim
24 words
The electrostatic ink jet system in accordance with claim 10 wherein the wall of said conical configuration has a thickness of approximately 0.002 inch.
Claim 19
Dependent Claim
32 words
The electrostatic ink jet system in accordance with claim 10 wherein the end of the tubular configuration which is not adjacent to the conical configuration is mounted to said ink supply means.
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) | 1985-09-13 | 1986-03-15 | 1986-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-13 | 1990-03-15 | 1990-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-13 | 1994-03-15 | 1994-09-14 | $7700.00 | Window Closed / Lapsed |