US3235874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic printer utilizing an array of mutually insulated pin electrodes
Assignee: Stromberg Carlson Corp
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Filing: 1962-08-23
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Granted: 1966-02-15
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Expires: 1982-08-23
Abstract
No abstract record available.
Inventors
- 👤 Sherman H Boyd
- 👤 Omer F Hammann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:02
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
AN ELECTROSTATIC PRINTER COMPRISING AN ARRAY OF MUTUALLY INSULATED CONDUCTIVE ELECTRODES HAVING WRITING POINTS WHICH ARE EXPOSED ON ONE SIDE OF SAID ARRAY, A CONDUCTIVE PLATE ADJACENT TO AND SPACED FROM SAID EXPOSED WRITING POINTS, MEANS FOR SELECTIVELY ELEVATING THE POTENTIAL OF SELECTED ONES OF SAID ELECTRODES UNTIL A SPACE DISCHARGE OCCURS BETWEEN THE WRITING POINTS OF THE SELECTED ELECTRODES AND SAID CONDUCTIVE PLATE, AND MEANS FOR INDIVIDUALLY ESTABLISHING A RESISTIVE DISCHARGE PATH IN PARALLEL WITH SAID SPACE DISCHARGE PATH BETWEEN EACH ELECTRODE OF SAID ARRAY AND SAID CONDUCTIVE PLATE, THE RESISTANCE OF EACH RESISTIVE DISCHARGE PATH BEING HIGH ENOUGH IN VALUE TO ALLOW THE POTENTIAL OF THE CORRESPONDING ELECTRODE TO REACH ITS SPACE DISCHARGE POTENTIAL WHEN SELECTED BY SAID POTENTIAL ELEVATING MEANS, YET AT THE SAME TIME PROVIDING MINIMUM DISCHARGE TIME FOR THE CAPACITIES BETWEEN THE CORRESPONDING ELECTRODE AND SAID CONDUCTIVE PLATE AND BETWEEN THE CORRESPONDING ELECTRODE AND ADJACENT ELECTRODES.
Claim 2
Dependent Claim
151 words
AN ELECTROSTATIC PRINTER COMPRISING AN ARRAY OF MUTUALLY INSULATED CONDUCTIVE ELECTRODES HAVING WRITING POINTS WHICH ARE EXPOSED ON ONE SIDE OF SAID ARRAY, A CONDUCTIVE PLATE ADJACENT TO AND SPACED FROM SAID EXPOSED WRITING POINTS, MEANS FOR SELECTIVELY ELEVATING THE POTENTIAL OF SELECTED ONES OF SAID ELECTRODES UNTIL A SPACE DISCHARGE OCCURS BETWEEN THE WRITING POINTS OF THE SELECTED ELECTRODES AND SAID CONDUCTIVE PLATE, AND MEANS FOR INDIVIDUALLY ESTABLISHING A RESISTIVE DISCHARGE PATH IN PARALLEL WITH SAID SPACE DISCHARGE PATH BETWEEN EACH ELECTRODE OF SAID ARRAY AND SAID CONDUCTIVE PLATE, THE RESISTANCE OF EACH RESISTIVE DISCHARGE PATH BEING HIGH ENOUGH IN VALUE TO ALLOW THE POTENTIAL OF THE CORRESPONDING ELECTRODE TO REACH ITS SPACE DISCHARGE POTENTIAL WHEN SELECTED BY SAID POTENTIAL ELEVATING MEANS, YET AT THE SAME TIME PROVIDING MINIMUM DISCHARGE TIME FOR THE CAPACITIES BETWEEN THE CORRESPONDING ELECTRODE AND SAID CONDUCTIVE PLATE AND BETWEEN THE CORRESPONDING ELECTRODE AND ADJACENT ELECTRODES.
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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |