Latent electrostatic image development
Abstract
Abstract METHOD FOR DEVELOPMENT OF A LATENT ELECTROSTATIC IMAGE EMPLOYING A DONOR MEMBER ADAPTED TO RETAIN TONER ON ITS SURFACE AND HAVING A NUMBER OF PROCESSING STATIONS ARRANGED AROUND ITS PERIPHERY THE DONOR MEMBER HAS A CORONA-CHARGEABLE DIELECTRIC SURFACE AND IS POSITIONED SO THAT A PORTION OF ITS PERIPHERY PASSES THROUGH TONER IN A VIBRATING RESERVOIR. THE RESERVOIR IS MAINTAINED AT A POTENTIAL LOWER THAN THE CHARGED DONOR MEMBER. THE TONER IS TRIBOELECTRICALLY CHARGED IN THE VIBRATING RESERVOIR VIA A COATING ON THE INSIDE OF THE RESERVOIR CAPABLE OF SO CHARGING THE TONER AND SAID TONER IS ATTRACTED TO THE DIELECTRIC SURFACE OF THE DONOR WHICH IS CORONA CHARGED OPPOSITELY TO THAT OF THE TONER.
Inventors
- 👤 John Maksymiak
- 👤 James W Smith
Bibliographic Details
Claims Analysis
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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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |