Patent US3700807A successfully refreshed from Google Patents.
US3700807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impactless printer
Assignee: Scope Inc
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Filing: 1970-02-13
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Granted: 1972-10-24
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Expires: 1990-02-13
Abstract
Abstract An impactless printer and control having movable heads with stylii extending therefrom for marking a coated paper. A stepping motor is used to transmit motion to the head so that the printer is asynchronous. Gating means control the output of a memory device connected to input data lines. The gating means are responsive to and actuated by a strobe pulse which controls the timing operation of the device.
Inventors
- 👤 Raoul E Drapeau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:19
CPC Classifications
H; H04; H04L; H04L21/00; H04L21/04; Y; Y10; Y10S; Y10S400/00; Y10S400/903
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
322 words
In an impactless, asynchronous teleprinter for printing chAracters in a matrix font including a printing stylii head having a plurality of electrodes and movably carried by a belt transversely of a recording sheet, a printing control comprising input circuit means for receiving a trigger pulse, input latch means coupled to said input circuit means, circuit means for coupling input data row lines to said latch means and supplying coded impulse signals to said latch means, read-only memory character generating means coupled to the output of said input latch means, high voltage gates coupled to the output of said character generating means, variable delay means coupled to said input circuit means, bistable means coupled to the output of said variable delay means, variable rate astable means coupled to the output of said variable delay means, gating means responsive to the outputs of said astable and bistable means, a ring counter coupled to the output of said gating means, a plurality of column enable lines coupling said ring counter to said character generating means, said ring counter sequentially energizing said enable lines, a plurality of high voltage gates equal in number to said plurality of electrodes coupled to the output of said character generating means, said gates receiving signals responsive to coded signals supplied to said memory character generating means by said input data row lines, high voltage pulse supply means gated by said gating means, means coupling said high voltage supply means to said high voltage gates, circuit means for coupling the outputs of said high voltage gates to said electrodes in said printing head, circuit means for coupling said bistable means and said input latch means to said ring counter whereby said bistable means and said input latch means are reset at the termination of said counter sequence, and motor means coupled to said input circuit means for driving said belt and moving said recording sheet in response to said trigger pulse.
Claim 2
Dependent Claim
322 words
In an impactless, asynchronous teleprinter for printing chAracters in a matrix font including a printing stylii head having a plurality of electrodes and movably carried by a belt transversely of a recording sheet, a printing control comprising input circuit means for receiving a trigger pulse, input latch means coupled to said input circuit means, circuit means for coupling input data row lines to said latch means and supplying coded impulse signals to said latch means, read-only memory character generating means coupled to the output of said input latch means, high voltage gates coupled to the output of said character generating means, variable delay means coupled to said input circuit means, bistable means coupled to the output of said variable delay means, variable rate astable means coupled to the output of said variable delay means, gating means responsive to the outputs of said astable and bistable means, a ring counter coupled to the output of said gating means, a plurality of column enable lines coupling said ring counter to said character generating means, said ring counter sequentially energizing said enable lines, a plurality of high voltage gates equal in number to said plurality of electrodes coupled to the output of said character generating means, said gates receiving signals responsive to coded signals supplied to said memory character generating means by said input data row lines, high voltage pulse supply means gated by said gating means, means coupling said high voltage supply means to said high voltage gates, circuit means for coupling the outputs of said high voltage gates to said electrodes in said printing head, circuit means for coupling said bistable means and said input latch means to said ring counter whereby said bistable means and said input latch means are reset at the termination of said counter sequence, and motor means coupled to said input circuit means for driving said belt and moving said recording sheet in response to said trigger pulse.
Claim 3
Dependent Claim
25 words
The teleprinter of claim 1 further comprising switch means integral with said printing stylii head for controlling said motor so as to position said head.
Claim 4
Dependent Claim
30 words
The teleprinter of claim 1 wherein said head comprises a plurality of insulated electrode fingers extending transversely from said head whereby said printing is visible as it is being printed.
Claim 5
Dependent Claim
145 words
In an impactless, asynchronous teleprinter for printing characters in a matrix font including a printing stylii having a plurality of electrodes and movably carried by a belt transversely of a recording sheet, a printing control comprising input circuit means for receiving a trigger pulse, input data lines for supplying coded signals representing the character to be printed, character generating means coupled to said input data lines, gating means coupled to the output of said character generating means, bistable means coupled to said input circuit means, variable rate astable means coupled to said input circuit means, said bistable means and said variable rate astable means supplying a sequence of pulses in response to said trigger pulse, enabling means coupling said bistable means and said variable rate astable means to said character generating means, and circuit means for coupling said gating means to said input circuit means.
Claim 6
Dependent Claim
145 words
In an impactless, asynchronous teleprinter for printing characters in a matrix font including a printing stylii having a plurality of electrodes and movably carried by a belt transversely of a recording sheet, a printing control comprising input circuit means for receiving a trigger pulse, input data lines for supplying coded signals representing the character to be printed, character generating means coupled to said input data lines, gating means coupled to the output of said character generating means, bistable means coupled to said input circuit means, variable rate astable means coupled to said input circuit means, said bistable means and said variable rate astable means supplying a sequence of pulses in response to said trigger pulse, enabling means coupling said bistable means and said variable rate astable means to said character generating means, and circuit means for coupling said gating means to said input circuit means.
Claim 7
Dependent Claim
25 words
The printing control of claim 4 further comprising variable delay means coupled between said input circuit means and said bistable means and said astable means.
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |