Method for assembling photographic self-processing apparatus
US4319827A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1980 |
| Grant date | Mar 16, 1982 |
| Priority date | — |
| Expiry date | Oct 3, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/52
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for assembling photographic processing systems of the type for advancing integral, self-processable film units to the exterior of a camera while simultaneously spreading a fluid processing composition in a uniformly thin layer between selected layers of a film unit. A number of processing rollers which comprise the system are provided with a partially textured surface by using an electric discharge machining process having predetermined conditions, and then a number of test processing systems are assembled with these rollers and other pieceparts randomly selected from lots of all other pieceparts which comprise the system. Characteristic film units are processed through the test processing systems, and the fluid layer thickness in each of these film units is afterwards measured and compared with a predetermined standard. If the combination of test system parts provides acceptable fluid layer thickness control performance, the remaining pieceparts of each lot are used in combination with rollers having the predetermined texturing to manufacture additional systems. If the test system performance is not acceptable, the electric discharge machining process conditions are adjus…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.