Lithographic plates made by spark discharges
US4911075A · kind A · utility
36Cited by
5References
46Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1988 |
| Grant date | Mar 27, 1990 |
| Priority date | — |
| Expiry date | Aug 19, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24521
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A lithographic plate for printing without dampening comprising a strong stable substrate, an oleophobic surface layer on the substrate and an oleophilic surface underlying the surface layer, the surface layer being decomposable by spark discharges originating from a non-contacting electrode scanned across the plate surface. A preferred plate embodiment includes a multiplicity of tiny electrically conductive peaks in the plate which point away from the substrate and are in a relatively uniform distribution across the plate surface area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.