Supplementary amount of developing solution determining method for a film developer
US4310234A · kind A · utility
5Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1980 |
| Grant date | Jan 12, 1982 |
| Priority date | — |
| Expiry date | Sep 22, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/00249
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for determining a supplementary amount of a developing solution for use in a film developer, wherein values of width signals for controlling a halftone dot generator of a picture reproducing machine are counted up, while a reproduction picture is recorded on a photosensitive film by the halftone dot generator according to picture signals which are obtained by scanning an original picture photoelectrically, and wherein a supplementary amount of the developing solution is determined according to the counted-up total value of the width signals prior to the development of the photosensitive film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.