Method of embossing a coated sheet with a diffraction or holographic pattern
US4913858A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1988 |
| Grant date | Apr 3, 1990 |
| Priority date | — |
| Expiry date | Oct 3, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2250/12
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A method for decoration of paper of plastic sheeting and other substrates, involving a novel technique for coating and embossing the substrate. The paper or plastic sheeting is supplied with a coating of thermosensitive material, as by extrusion. The coated sheet is heated to adequately soften the coating, such as by use of a heated cylinder, and remote heat sources such as infrared heaters. The softened sheet surface is then decorated using an embossing member, to provide a diffraction pattern or hologram. Use of an embossment pattern of lesser depth than the surface roughness of the sheet before embossing provides attractive decorative patterns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.