Control of magnetic printed sheets
US6032779A · kind A · utility
3Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1998 |
| Grant date | Mar 7, 2000 |
| Priority date | — |
| Expiry date | Apr 16, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D7/004
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Banknotes printed with magnetic ink pass through a tri-color age detector 34, and then between a pair of premagnetization rollers (10,12) having opposite magnetic polarity of such strength that the magnetic signature of all banknotes is enhanced to the same level; the notes are then stacked 50 in an electromagnetic stacker 42. Such notes, having magnetic signatures of the same level, can also be recognized and/or validated by magnetic techniques also.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.