US3698002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Droplet synchronization for electrostatic printing
Assignee: AT&T Teletype Corp
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Filing: 1971-08-18
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Granted: 1972-10-10
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Expires: 1991-08-18
Abstract
Abstract A wire is disposed concentrically within the nozzle of a printer to define a channel for ink which issues from the nozzle along a downstream projecting end portion of the wire. An electromagnet is arranged to oscillate the wire for imparting a synchronous disturbance to ink flowing about said end portion, whereby ink droplets may be generated at a uniform frequency in a stream moving across a span in which the droplets are deflected for printingly impinging a carrier spaced downstream from the nozzle.
Inventors
- 👤 Sherman P Appel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:32
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/22; B41J2/23; B41J2/235; B41J2/25
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
51 words
In a synchronous jet printing process, the steps of: moving a stream of ink horizontally along a wire from a nozzle; issuing the stream from a downstream end portion of said wire; and oscillating the wire to produce uniform disturbances in said stream for generating ink droplets at a uniform frequency.
Claim 2
Dependent Claim
51 words
In a synchronous jet printing process, the steps of: moving a stream of ink horizontally along a wire from a nozzle; issuing the stream from a downstream end portion of said wire; and oscillating the wire to produce uniform disturbances in said stream for generating ink droplets at a uniform frequency.
Claim 3
Dependent Claim
12 words
A process according to claim 1 wherein the wire is oscillated magnetomotively.
Claim 4
Dependent Claim
16 words
A process according to claim 2 wherein the direction of oscillation is axially of the wire.
Claim 5
Dependent Claim
16 words
A process according to claim 2 wherein the direction of oscillation is transversely of stream flow.
Claim 6
Dependent Claim
68 words
In electrostatic printing apparatus of the type adapted to print with selected droplets of an ink generated synchronously from a stream issued from a nozzle and in response to an electrical alternation, the improvement characterized by: a wire associated with said nozzle and having an end portion projecting downstream beyond said nozzle; and means for oscillating said wire at a regular frequency for imparting synchronism to said droplets.
Claim 7
Dependent Claim
68 words
In electrostatic printing apparatus of the type adapted to print with selected droplets of an ink generated synchronously from a stream issued from a nozzle and in response to an electrical alternation, the improvement characterized by: a wire associated with said nozzle and having an end portion projecting downstream beyond said nozzle; and means for oscillating said wire at a regular frequency for imparting synchronism to said droplets.
Claim 8
Dependent Claim
13 words
A combination according to claim 5 wherein said oscillating means comprises an electromagnet.
Claim 9
Dependent Claim
22 words
A combination according to claim 6 further characterized in that said electromagnet is arranged for oscillating said wire axially of said stream.
Claim 10
Dependent Claim
23 words
A combination according to claim 6 wherein said electromagnet is arranged for oscillating the end portion of said wire transversely of said stream.
Claim 11
Dependent Claim
26 words
A combination according to claim 1 wherein said wire is disposed concentrically within said nozzle and defines a channel for ink through said nozzle for printing.
Claim 12
Dependent Claim
22 words
A combination according to claim 6 wherein said wire has a part of magnetic material associated with said electromagnet for effecting oscillations.
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |