Photographic film unit having expandable high volume trap
Abstract
Abstract A SELF-DEVELOPING FILM UNIT INCLUDING A PHOTOSENSITIVE SHEET AND A TRANSPARENT SECOND SHEET HELD IN FACE-TO-FACE RELATION WITH RESPECT TO THE PHOTOSENSITIVE SHEET. THE SHEETS ARE BOUND TOGETHER AT THEIR SIDES AND A CONTAINER OR LIQUID PROCESSING COMPOSITION IS SITUATED NEAR A LEADING EDGE OF THE SHEETS. THE SHEETS ARE ADAPTED TO BE MOVED RELATIVE TO PRESSURE-APPLYING ROLLERS, LEADING EDGE FOREMOST, THEREBY SPREADING THE LIQUID PROCESSING COMPOSITION ACROSS THE AREA OF THE PHOTOSENSITIVE SHEET THAT HAS BEEN EXPOSED THROUGH THE TRANSPARENT SHEET. LIQUID PROCESSING COMPOSITION IN EXCESS OF THAT NEEDED TO COMPLETELY COVER THE EXPOSED AREA OF THE PHOTOSENSITIVE SHEET IS COLLECTED IN TRAPPING MEANS NEAR THE TRAILING EDGE OF THE FACE-TO-FACE SHEETS IN A CHAMBER THAT RESPONDS TO AN INCREASE IN HYDRAULIC PRESSURE OF THE EXCESS LIQUID PROCESSING COMPOSITION TO INCREASE ITS VOLUME.
Inventors
- 👤 Richard J Chen
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |