Methods for producing imaged coated articles by using magnetic pigments
US6808806B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2001 |
| Grant date | Oct 26, 2004 |
| Priority date | — |
| Expiry date | Jun 2, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31504
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Methods and devices for producing images on coated articles are provided. The methods generally comprise applying a layer of magnetizable pigment coating in liquid form on a substrate, with the magnetizable pigment coating containing a plurality of magnetic non-spherical particles or flakes. A magnetic field is then applied to selected regions of the pigment coating while the coating is in liquid form, with the magnetic field altering the orientation of selected magnetic particles or flakes. Finally, the pigment coating is solidified, affixing the reoriented particles or flakes in a non-parallel position to the surface of the pigment coating to produce an image such as a three dimensional-like image on the surface of the coating. The pigment coating can contain various interference or non-interference magnetic particles or flakes, such as magnetic color shifting pigments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.