Automatic development controller
Abstract
Abstract A TONER CONCENTRATION CONTROL SYSTEM FOR A RECORDING APPARATUS IN WHICH A SENSOR COMPRISING TWO PARALLEL SPACED NESA GLASS PLATED THROUGH WHICH DEVELOPER MATERIAL FLOWS SERVES TO GENERATE SIGNALS TO AUTOMATICALLY CONTROL TONER DISPENSING. THE LOWER PLATE HAS A PATTERN WHICH IS HELD AT A POTENTIAL TO ATTRACT TONER. A LIGHT SOURCE AND PHOTOCELL ON EITHER SIDE OF THE PLATE SENSES THE TONER DEPOSIT PER UNIT OF TIME IN ACCORDANCE WITH TONER CONCENTRATION. ANOTHER PHOTOCELL IS ARRANGED AS A LEG OF A BRIDGE CIRCUIT WHICH INCLUDES THE FIRST PHOTOCELL SUCH THAT WHEN THE LATTER SENSES A TONER SITUATION AWAY FROM THE DESIRED DENSITY EFFECT, AN UNBALANCE OF THE BRIDGE OCCURS CAUSING TONER DISPENSING.
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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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |