Postal-compliant fluorescent inkjet papers, inks for preparing them and individualized postage stamps printed thereon
US7973098B2 · kind B2 · utility
1Cited by
6References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 18, 2007 |
| Grant date | Jul 5, 2011 |
| Priority date | — |
| Expiry date | Nov 19, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31504
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Described are new custom postage printing stocks, coating compositions, processes for preparing and utilizing these and resulting postage products. Disclosed ink formulations comprise: invisible fluorescent dye and/or pigment (preferably red-fluorescent dye), which is fluorescent in the range of 580 to 640 nm when illuminated with light at 254 nm; water-soluble binder; substrate penetrant, fluorescence stabilizer; substrate anticurl agent and water. The inks, when coated on substrates and dried, can improve the quality and color of images printed as compared to images printed without the aid of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.