Arrangement for and a method of processing photosensitive articles
US4480901A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1982 |
| Grant date | Nov 6, 1984 |
| Priority date | — |
| Expiry date | Sep 21, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7306
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A developing apparatus for photosensitive material has a processing bath and a conveying system for advancing photosensitive material through the path. A supply vessel accommodates a regenerating solution for the bath and a flow regulating device such as a pump or a valve is provided to regulate the admission of the regenerating solution into the bath. A sensing system senses the surface area of the photosensitive material advanced into the bath and supplies this information to a computer which then calculates the quantity of regenerating solution to be supplied to the bath. The control unit operates the flow regulating device at intervals in order to deliver the calculated quantity of regenerating solution to the bath. A measuring unit connected with the computer measures the actual quantity of regenerating solution supplied to the bath during operation of the flow regulating device. The actual and calculated quantities of the regenerating solution are compared by the computer which performs a correction in these quantities are different. The computer may also be programmed to generate an alarm if corrections must be made too frequently or if the difference between the actual and …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.