Roll sign
US5682693A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 1996 |
| Grant date | Nov 4, 1997 |
| Priority date | — |
| Expiry date | Jul 10, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F11/14
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A roll sign has closed loop belts made up of a series of pivotally connected links for the belts to translate parallel to each other and vertically after passing over driven wheels. Grid members having grooved tracks into which menu strips slide for being lighted from behind to make information on the strips readable. The grid members have similar end portions or webs which contain a keyhole defined by a large hole intersecting a smaller hole. Each link has an attachment pin including a shank whose end is extending through an aperture in the link and a head on the shank that is disposed on a side of the link opposite from the end of the pin. A spring biases the head against the grid member. The large holes of the keyholes fit over the head so that when this is done the grid is shifted laterally against the spring force to have the small holes slide under the head to hold the grid. The leading end of a transparency sheet is attached to the belts by a sheet gripper member that has keyholes on opposite ends for engaging the pins on the links. The free end of the sheet is floating and not attached to the belts but there are clips that have keyholes for attaching to pins on the links an…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.