Surface treated security paper and method and device for producing surface treated security paper
US6174586A · kind A · utility
24Cited by
5References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 7, 1998 |
| Grant date | Jan 16, 2001 |
| Priority date | — |
| Expiry date | May 7, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2495
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to security paper (1) formed from base paper provided with a surface treatment layer on at least one side of the paper, characterized in that the layer thickness locally deviates markedly from the layer (10) thickness of the remaining dominant paper surface, and in that the local deviation forms distinctive mark (2) in the paper. The present invention also relates to a method and to a device for producing surface treated security paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.