Frame construction for a projecting illuminated sign box
US4299042A · kind A · utility
4Cited by
6References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1979 |
| Grant date | Nov 10, 1981 |
| Priority date | — |
| Expiry date | Dec 19, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F13/0454
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A frame construction for an illuminated sign comprises a metal sheathing on both top and bottom frame members of the frame, the sheathing being bent at its longitudinal edges to form longitudinally extending grooves, wherein both the top and the bottom frame members having longitudinally extending flanges inserted in the sheathing, while the longitudinal grooves of the sheathing are employed for mounting partly translucent front sheets, end frame members of the frame including tongues extending perpendicular thereto which are insertable into cavities formed by the longitudinal bent portions of the sheathing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.