Photosensitive sheet processor
US4300828A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1980 |
| Grant date | Nov 17, 1981 |
| Priority date | — |
| Expiry date | Jul 14, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03D3/132
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A processor of sheets of photosensitive material includes an entrance opening through which sheets enter the processor, developer, fix and wash tanks; a dryer; an exit opening through which the sheets exit the processor; and a transport system for transporting the sheets through the processor. Signals from a film sensor positioned proximate the entrance opening indicate when a leading edge and a trailing edge of each sheet enters the processor. An encoder provides signal pulses for each incremental movement of a drive shaft which drives the transport system. The signal pulses, which provide an indication of the linear travel of the sheets through the processor, are counted. Based upon the signals from the film sensor and the counted pulses, a signal is provided when the trailing edge of the last sheet passes out of the developer tank, so that the speed of the transport can be changed without affecting the developing of the images on the last sheet. Another signal is provided which indicates when the trailing edge of the last sheet enters the wash tank. This signal is used to indicate when previously processed sheets may be fed back into the wash tank of the processor for rewashing …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.