Method of removing vacuum evaporated selenium photoresponsive layer from base material of drum of electrophotgraphic apparatus
US3990907A · kind A · utility
4Cited by
9References
3Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 26, 1974 |
| Grant date | Nov 9, 1976 |
| Priority date | — |
| Expiry date | Sep 26, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49815
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
To remove an old photoresponsive or photoconductive selenium layer from a drum of a copy machine as preparation for the vacuum evaporation of a new photoresponsive layer thereonto, the drum is immersed in a hot fluid such as water, steam or liquid or vapor trichloroethylene or perchloroethylene. Due to the softening of the photoresponsive layer and the difference between the coefficients of thermal expansion of the photoresponsive layer and the drum material, the photoresponsive layer may be subsequently easily physically removed from the drum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.