Retoning carrier beads in the development zone
Abstract
Abstract A development method wherein developer, comprising a mixture of toner particles and carrier beads, is lifted from a trough or sump and is cascaded over the surface of an insulating plate bearing a latent electrostatic image and the toner is attracted from the carrier to the plate to develop the latent image thereon. The carrier beads are retoned with toner particles from a container located in the development zone as the beads give up toner particles to the plate during the development process. The carrier beads and residual toner particles are directed to the trough where additional toner particles are then added to the mixture, whereupon the returned carrier beads are again lifted from the trough and cascaded over the insulating plate to start the same cycle over again.
Inventors
- 👤 E Weiler
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |