US3673601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid jet recorder
Assignee: Individual
•
Filing: 1970-03-31
•
Granted: 1972-06-27
•
Expires: 1990-03-31
Abstract
Abstract The present device is a liquid jet recorder having a capillary nozzle out of which an electrically conductive ink jet is expelled by pressure, and a control electrode or tube coaxially surrounding the path of the jet, the wall of the tube being porous to the ink and formed of an electrically conductive material. Charging means are included for charging the jet at one potential and the electrode at another potential. The recording surface upon which the ink jet is intended to selectively write is provided with means for selectively charging the surface at a potential which repels any drops of the jet from striking the surface.
Inventors
- 👤 Carl Hellmuth Hertz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:18
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/17; B41J2/18; B41J2/185; B41J2/015; B41J2/02; B41J2/03; H; H04; H04N; H04N1/00; H04N1/024; H04N1/032; H04N1/034; B41J2002/1853
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
88 words
In a liquid jet recorder for pressure ejecting along a predetermined path to a recording surface, a fine jet of an electrically conductive tracing fluid from a capillary nozzle, and including a control electrode positioned adjacent said nozzle at the point of droplet formation, and means for selectively applying between said nozzle and electrode a potential sufficient to cause said jet to disperse into a conical spray, the improvement comprising means for applying to said surface an electrical charge such that said fluid is repelled from said surface.
Claim 2
Dependent Claim
88 words
In a liquid jet recorder for pressure ejecting along a predetermined path to a recording surface, a fine jet of an electrically conductive tracing fluid from a capillary nozzle, and including a control electrode positioned adjacent said nozzle at the point of droplet formation, and means for selectively applying between said nozzle and electrode a potential sufficient to cause said jet to disperse into a conical spray, the improvement comprising means for applying to said surface an electrical charge such that said fluid is repelled from said surface.
Claim 3
Dependent Claim
22 words
In a liquid jet recorder as defined in claim 1 wherein said electrical charge is at the same polarity as said potential.
Claim 4
Dependent Claim
32 words
In a liquid jet recorder as defined in claim 1 wherein said means for applying said charge comprises a sliding contact positioned to contact said surface and connected to a voltage source.
Claim 5
Dependent Claim
48 words
In a liquid jet recorder as defined in claim 1, wherein said means for applying said charge comprises at least one metallic point positioned adjacent to said surface and connected to a voltage source so as to provide a corona discharge to said surface for charging the latter.
Claim 6
Dependent Claim
27 words
In a liquid jet recorder as defined in claim 1 wherein said capillary is mechanically vibrated at a high frequency by vibrator means coupled to said nozzle.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |