US4550326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidic tuning of impulse jet devices using passive orifices
Assignee: HP Inc
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Filing: 1983-05-02
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Granted: 1985-10-29
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Expires: 2003-05-02
Abstract
Abstract A nozzle plate for impulsive jet devices is proposed where the quality of ejected droplets is improved by means of additional non-emitting orifices. These orifices may act as fluid accumulators and tuned or untuned absorbers of pressure disturbances to optimize drop quality and reduce fluidic crosstalk between adjacent drop generators. The presence of these orifices permits additional degrees-of-freedom in the design of high-quality impulsive jet devices. Sufficient crosstalk reduction results that crosstalk reduction barriers can be eliminated.
Inventors
- 👤 Ross R. Allen
- 👤 Daniel E. Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:47
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/14; B41J2/1433; B41J2/015; B41J2/04; B41J2/045; B41J2/055; B41J2/14016; B41J2/14032; B41J2002/14387; B41J2002/14475
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
90 words
An improved impulse jet device of the type in which a fluid is supplied from a source of fluid to at least one emitter, each emitter having means for ejecting droplets of ink through an associated nozzle in a nozzle plate, said nozzle plate including at least one non-emitting orifice adjacent to each of the nozzles, wherein, in the improved impulse jet device, at least one of the non-emitting orifices is an emitter and said improvement comprises means for inactivating the emitter which is to serve as a non-emitting orifice.
Claim 2
Dependent Claim
90 words
An improved impulse jet device of the type in which a fluid is supplied from a source of fluid to at least one emitter, each emitter having means for ejecting droplets of ink through an associated nozzle in a nozzle plate, said nozzle plate including at least one non-emitting orifice adjacent to each of the nozzles, wherein, in the improved impulse jet device, at least one of the non-emitting orifices is an emitter and said improvement comprises means for inactivating the emitter which is to serve as a non-emitting orifice.
Claim 3
Dependent Claim
103 words
An improved impulse jet device of the type in which a fluid is supplied from a source of fluid to at least one emitter, each emitter having means for ejecting droplets of ink through an associated nozzle in a nozzle plate, said nozzle plate including at least one non-emitting orifice adjacent to each of the nozzles, wherein, in the improved impulse jet device the nozzle plate has a top surface in contact with the ambient atmosphere and wherein said at least one non-emitting orifice forms at said top surface an opening that is a section of an annular ring centered on a nozzle.
Claim 4
Dependent Claim
103 words
An improved impulse jet device of the type in which a fluid is supplied from a source of fluid to at least one emitter, each emitter having means for ejecting droplets of ink through an associated nozzle in a nozzle plate, said nozzle plate including at least one non-emitting orifice adjacent to each of the nozzles, wherein, in the improved impulse jet device the nozzle plate has a top surface in contact with the ambient atmosphere and wherein said at least one non-emitting orifice forms at said top surface an opening that is a section of an annular ring centered on a nozzle.
Claim 5
Dependent Claim
77 words
An improved impulse jet device of the type in which a fluid is supplied from a source of fluid to at least one emitter, each emitter having means for ejecting droplets of ink through an associated nozzle in a nozzle plate, said nozzle plate including at least one non-emitting orifice adjacent to each of the nozzles, wherein, in the improved impulse jet device, in a side cross-sectional view of the orifice, the orifice has a nonrectangular cross-section.
Claim 6
Dependent Claim
77 words
An improved impulse jet device of the type in which a fluid is supplied from a source of fluid to at least one emitter, each emitter having means for ejecting droplets of ink through an associated nozzle in a nozzle plate, said nozzle plate including at least one non-emitting orifice adjacent to each of the nozzles, wherein, in the improved impulse jet device, in a side cross-sectional view of the orifice, the orifice has a nonrectangular cross-section.
Claim 7
Dependent Claim
67 words
An impulse jet device as in claim 3 wherein the nozzle plate has a top surface in contact with the ambient atmosphere, wherein the orifice has an opening at the top surface of the nozzle plate and wherein, in a side cross-sectional view of the orifice, the orifice has a cross-section that converges in the directional toward the opening at the top surface of the nozzle plate.
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) | 1988-10-28 | 1989-04-29 | 1989-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-28 | 1993-04-29 | 1993-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-28 | 1997-04-29 | 1997-10-29 | $7700.00 | Window Closed / Lapsed |