Method for the manufacture of security paper
US5871615A · kind A · utility
72Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Feb 16, 1999 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F1/44
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Security paper carries an intricate tactile surface profile pattern which has been imparted to the paper during its manufacture, at a stage after initial de-watering but before final drying, by passing the paper through a nip between a forming surface corresponding to the desired pattern and a backing surface. The tactile pattern is of excellent durability, and its intricacy offers a high degree of security. The tactile pattern is visible when viewed under low angle light, which facilitates verification or authentication of security documents made using the patterned paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.