Granulated screen and a method of manufacturing same
US4374913A · kind A · utility
0Cited by
4References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 2, 1981 |
| Grant date | Feb 22, 1983 |
| Priority date | — |
| Expiry date | Jul 2, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F5/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A thin translucent film is applied onto a plate of glass by pouring an asphalt solution on such plate. The asphalt coating is dried under influence of light whereby the asphalt will become insoluble and a fine grain is developed. This grain is thereafter printed optically onto a photosensitive material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.