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US4153901A
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US
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Variable frequency multi-orifice IJP
Assignee: Bantec Inc
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Filing: 1977-12-16
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Granted: 1979-05-08
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Expires: 1997-12-16
Abstract
Abstract A hemicylindrical crystal is used in a variable frequency multi-orifice ink jet modulator. Unwanted resonant frequencies are damped providing the capability of wide band operation. A phase control is used with the modulator to control printing operations.
Inventors
- 👤 John T. White
- 👤 Kenneth T. Lovelady
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:00
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/015; B41J2/02; B41J2/03; G; G01; G01D; G01D15/00; G01D15/16; G01D15/18
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
69 words
A wide band multi-orifice variable frequency modulator for an ink jet printer comprising a hemicylindrical transducer, a solid wave damping material backing said transducer to attenuate unwanted resonance peaks over the frequency range of operation, a base member having a recess in which the wave damping material and transducer resides, and a nozzle plate closing the transducer such that each of the orifices is equidistant from the hemicylindrical transducer.
Claim 2
Dependent Claim
69 words
A wide band multi-orifice variable frequency modulator for an ink jet printer comprising a hemicylindrical transducer, a solid wave damping material backing said transducer to attenuate unwanted resonance peaks over the frequency range of operation, a base member having a recess in which the wave damping material and transducer resides, and a nozzle plate closing the transducer such that each of the orifices is equidistant from the hemicylindrical transducer.
Claim 3
Dependent Claim
44 words
The modulator according to claim 1 wherein to provide variable frequency operation the physical dimensions of the transducer are smaller than half the wavelength than of the shortest standing acoustical wave that can be established at the highest of the operable drop frequency rates.
References Cited (Backward Citations)
US3683396A
Cited
US4068144A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-07 | 1982-11-06 | 1983-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-07 | 1986-11-06 | 1987-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-07 | 1990-11-06 | 1991-05-08 | $7700.00 | Window Closed / Lapsed |