Patent US3828357A successfully refreshed from Google Patents.
US3828357A
Expired / Lapsed
US
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Pulsed droplet ejecting system
Assignee: Gould Inc
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Filing: 1973-03-14
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Granted: 1974-08-06
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Expires: 1993-03-14
Abstract
Abstract A facsimile system is described which employs a pulsed ink droplet ejecting system as the record marking means. In such a system, undesired droplets are sometimes deposited on record areas that should receive no ink. The cause of this irregularity is explained and circuit modifications are described which eliminate the undesired marking.
Inventors
- 👤 W Koeblitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:35
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/40025
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
178 words
A record marking system adapted for use in a facsimile type recorder wherein a record receiving member is successively marked with varying degrees of shading representative of electric signal information supplied to said recorder comprising: an electric pulse actuated ink ejecting system of the type which ejects no ink when the pulse amplitude is below a first level, ejects ink droplets with an unacceptable degree of irregularity when the pulse amplitudes fall within a threshold zone extending from said first level to a higher second level, and ejects ink with an acceptable degree of regularity in response to each pulse having amplitude above said second level, the quantity of ink ejected per pulse having amplitude above said second level increasing as the pulse amplitude increases; and circuit means connected to said ink ejecting system and adapted to apply electric pulses thereto, said circuit means including means for preventing the application of pulses having amplitudes which fall in said threshold zone, but permitting the application to said ink ejecting system of pulses having varying amplitudes above said threshold zone.
Claim 2
Dependent Claim
178 words
A record marking system adapted for use in a facsimile type recorder wherein a record receiving member is successively marked with varying degrees of shading representative of electric signal information supplied to said recorder comprising: an electric pulse actuated ink ejecting system of the type which ejects no ink when the pulse amplitude is below a first level, ejects ink droplets with an unacceptable degree of irregularity when the pulse amplitudes fall within a threshold zone extending from said first level to a higher second level, and ejects ink with an acceptable degree of regularity in response to each pulse having amplitude above said second level, the quantity of ink ejected per pulse having amplitude above said second level increasing as the pulse amplitude increases; and circuit means connected to said ink ejecting system and adapted to apply electric pulses thereto, said circuit means including means for preventing the application of pulses having amplitudes which fall in said threshold zone, but permitting the application to said ink ejecting system of pulses having varying amplitudes above said threshold zone.
Claim 3
Dependent Claim
28 words
A record marking system according to claim 1 in which said circuit means includes means for preventing the application of all pulses having amplitudes below said second level.
Claim 4
Dependent Claim
154 words
In a pulsed droplet ejecting system comprising: a conduit connected to a nozzle; liquid filling said conduit and nozzle; a transducer coupled to said liquid in said conduit and adapted to apply a pressure pulse to said liquid when an electric pulse is applied to said transducer, said pressure pulse causing ejection of liquid from said nozzle when the amplitude of said electric pulse exceeds a limiting level but causing no ejection when the amplitude of said pulse is less than said level; and circuit means connected to said transducer and adapted to apply thereto electric pulses having a range of amplitudes embracing said level; the improvement which comprises: said circuit means including means adapted to prevent the application to said transducer of pulses having amplitudes falling within a selected range of amplitudes which includes said level, while permitting application to said transducer of pulses of varying amplitudes above said selected range of amplitudes.
Claim 5
Dependent Claim
154 words
In a pulsed droplet ejecting system comprising: a conduit connected to a nozzle; liquid filling said conduit and nozzle; a transducer coupled to said liquid in said conduit and adapted to apply a pressure pulse to said liquid when an electric pulse is applied to said transducer, said pressure pulse causing ejection of liquid from said nozzle when the amplitude of said electric pulse exceeds a limiting level but causing no ejection when the amplitude of said pulse is less than said level; and circuit means connected to said transducer and adapted to apply thereto electric pulses having a range of amplitudes embracing said level; the improvement which comprises: said circuit means including means adapted to prevent the application to said transducer of pulses having amplitudes falling within a selected range of amplitudes which includes said level, while permitting application to said transducer of pulses of varying amplitudes above said selected range of amplitudes.
Claim 6
Dependent Claim
20 words
In a pulsed droplet ejecting system as described in claim 3, said selected range of amplitudes extending to zero amplitude.
References Cited (Backward Citations)
US2545463A
Cited
US3683212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |