Electrostatic printing apparatus
Abstract
Abstract EACH OF N GROUPS OF PIN ELECTRODES COMPRISES M PIN ELECTRODES FOR PRINTING N COLUMNS IN A LINE, EACH COLUMN INCLUDING M PIN ELECTRODES. M PIN DRIVING CIRCUITS ARE CONNECTED TO AND DRIVE THE PIN ELECTRODES AND N COLUMN DRIVING CIRCUITS ARE CONNECTED TO AND DRIVE THE PIN ELECTRODES WITH A SIGNAL OF OPPOSITE POLARITY. EACH OF A PLURALITY OF CLAMPING CIRCUITS CLAMPS A CORRESPONDING ONE OF THE PIN ELECTRODES TO A POTENTIAL BETWEEN IT AND A POTENTIAL PLATE LOWER THAN A NO-PRINTING THRESHOLD LEVEL. THE PIN ELECTRODES ARE SELECTIVELY DRIVEN BY SIGNALS SUPPLIED BY ONLY ONE OF THE PIN DRIVING AND COLUMN DRIVING CIRCUITS TO PRINT AN ELECTROSTATIC IMAGE ON A RECORD MEDIUM INTERPOSED BETWEEN THE PIN ELECTRODES AND THE POTENTIAL PLATE. THE SIGNALS HAVE A POLARITY WHICH IS NOT CLAMPED BY THE CLAMPING CIRCUITS.
Inventors
- 👤 Kenmi Tsukatani
- 👤 Makoto Ohta
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |