Sign board casing
US4067130A · kind A · utility
1Cited by
3References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 4, 1976 |
| Grant date | Jan 10, 1978 |
| Priority date | — |
| Expiry date | Nov 4, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F2013/145
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to an oblong sign board casing comprising a reflector sheet provided with parallel embossings extending in planes substantially perpendicular to a longitudinal axis. The profiled reflector sheet is curved about 90.degree. round a longitudinal axis, whereby a self-supporting construction is obtained. This construction renders it possible to provide the front plate with a flange and a sharp edge at the bottom. The embossings cause an effective diffusion of the light, also towards the bottom face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.