Combined process of printing and forming a hologram
US4933120A · kind A · utility
89Cited by
11References
73Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1988 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Apr 18, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2270/12
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A new technique and apparatus for printing that includes the formation of a hologram, or other type of diffraction pattern, directly on a desired end product of paper, or other sheet material. The hologram, or other diffraction pattern, is formed by casting a surface relief pattern directly onto the sheet material in a limited area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.