Patent US4583690A successfully refreshed from Google Patents.
US4583690A
Expired / Lapsed
US
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Anti-wetting in fluid nozzles
Assignee: HP Inc
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Filing: 1985-07-26
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Granted: 1986-04-22
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Expires: 2005-07-26
Abstract
Abstract A novel ionic surface preparation for nozzles used in spraying fluid droplets such as used in ink jet printers is disclosed. In conjunction with an oppositely charged ionic anti-wetting agent dissolved in the sprayed fluid, the new surface preparation reliably reduces the wetting of the nozzle surfaces, thereby facilitating the production of more uniform and predictable droplets.
Inventors
- 👤 Young S. You
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:00
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/16; B41J2/1606; Y; Y10; Y10S; Y10S239/00; Y10S239/19
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
A system for spraying a fluid from a nozzle having a surface in contact with said fluid, comprising: ions of a first type imbedded in at least a portion of the surface of said nozzle; and a chemically specific adsorbing anti-wetting compound having ions of a second type dissolved in the fluid, so that the portion of the surface of the nozzle imbedded with ions of the first type will selectively adsorb the anti-wetting compound from the fluid being sprayed.
Claim 2
Independent Claim
80 words
A system for spraying a fluid from a nozzle having a surface in contact with said fluid, comprising: ions of a first type imbedded in at least a portion of the surface of said nozzle; and a chemically specific adsorbing anti-wetting compound having ions of a second type dissolved in the fluid, so that the portion of the surface of the nozzle imbedded with ions of the first type will selectively adsorb the anti-wetting compound from the fluid being sprayed.
Claim 3
Dependent Claim
26 words
A system as in claim 1 wherein the ions of the first type are substantially cations, and the ions of the second type are substantially anions.
Claim 4
Dependent Claim
26 words
A system as in claim 1 wherein the ions of the first type are substantially anions, and the ions of the second type are substantially cations.
Claim 5
Dependent Claim
27 words
A system as in claim 1 wherein the ions of the first type are substantially P-type material, and the ions of the second type are substantially anions.
Claim 6
Dependent Claim
27 words
A system as in claim 1 wherein the ions of the first type are substantially N-type material, and the ions of the second type are substantially cations.
References Cited (Backward Citations)
US3921916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |