Object with an optical effect
US6494491B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2000 |
| Grant date | Dec 17, 2002 |
| Priority date | — |
| Expiry date | Dec 15, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1486
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An item with a surface area creating an optical effect is such that the surface area with the optical effect exhibits at least two images (12, 14) separated a distance (d) from each other by means of a transparent layer of material (10). The distance (d) between the images 12, 14) and the distance (a) between two neighboring elements (16) forming the images (12, 14) are adjusted with respect to each other such that on altering the viewing angle (&agr;) the perceived overall image formed by the overlapping of the images (12, 14) is altered. A preferred application for the item lies in forms of packaging, packaging material, an aid to packaging, bonds or entry tickets with forgery-proof surface area and/or surface areas that have to meet high demands.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.