Method of curtain coating pigment particles on paper plies
US4008121A · kind A · utility
8Cited by
9References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 4, 1974 |
| Grant date | Feb 15, 1977 |
| Priority date | — |
| Expiry date | Dec 4, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/277
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In order to opacify one side of a multi-ply paperboard comprised of a plurality of paper plies, pigment particles are spread between a pair of the plies. Pigment particles are preferably clay particles and are preferably spread immediately beneath the outermost ply at the one side of the board at a distribution of between 5 grams per square meter and 60 grams per square meter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.