Folding card with changing picture
US4809453A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 1987 |
| Grant date | Mar 7, 1989 |
| Priority date | — |
| Expiry date | May 15, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F1/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention relates to a folding card that displays one picture when closed and another picture when opened, comprising three hinged panels which form a front cover, a rear cover and an inside panel. Positioned partially in upper and lower channels formed by flanges hinged to the inside cover are a stationary picture unit and a movable picture unit. The picture units are each made of two subunits formed with slots and strips which are fitted together with the strips partially overlapping. The two picture units are mated together, and an extension of the moving picture unit is attached to the front cover. When the assembled picture card is in a closed position, the strips of the movable unit are displayed; when opened, the extension pulls the movable picture unit to the left causing its strips to smoothly slide behind the now displayed strips of the stationary unit as a result of the overlapping construction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.