Electrostatic charging and discharging apparatus
Abstract
Abstract THIS INVENTION RELATES TO AN APPARATUS FOR THE ELECTROSTATIC CHARGING OR DISCHARGING OF THE SURFACE OF WEB OR SHEET-LIKE MATERIAL, ESPECIALLY THE ELECTROSTATIC CHARGING OF PHOTOCONDUCTIVE INSULATING LAYERS, SAID APPARATUS INCLUDING A CHARGE-ABSORBING ELECTRODE IN THE FORM OF A ROTATABLE ROLLER MEANS WITH A ROUGHENED SURFACE, SAID ROLLER MEANS BEING PARTIALLY SURROUNDED BY AN INSULATOR AND LOCATED BETWEEN POINTED CORONA ELECTRODES IN THE FORM OF A SERIES OF CLOSELY SPACED NEEDLES WHICH ARE EXTERNALLY PROTECTED BY A SECOND INSULATOR, THE OUTER EXTERMITY OF THE SAID ROLLER MEANS BEING SPACED SUBSTANTIALLY EQUALLY TO THE POINTS OF THE NEEDLES FROM THE PATH OF A MATERIAL TO BE PROCESSED BY THE APPARATUS.
Inventors
- 👤 G Marx
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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |