Method of marking substantially flat paper articles
US4752684A · kind A · utility
4Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 24, 1986 |
| Grant date | Jun 21, 1988 |
| Priority date | — |
| Expiry date | Oct 24, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K1/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A substantially flat paper article or product is marked by applying thereto a luminophore. In order for the thus produced markings to remain discernible even if the paper article constitutes a component or part in a collation or composite of such paper articles, the markings are applied to at least one location of a marginal region including the contiguous edge of the paper article. This marking method can be used to monitor the completeness of an end product manufactured by collating a plurality of different paper articles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.