Method and apparatus for curtain coating providing a lateral liquid film velocity equal to the curtain falling velocity
US6048582A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1998 |
| Grant date | Apr 11, 2000 |
| Priority date | — |
| Expiry date | Oct 2, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S118/04
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
In the method for curtain coating a moving support with any kind of coating solution, lateral flow is supplied to the guided curtain on both sides transversely to the length of the curtain and in parallel to the front wall of the lateral guides. The supply of the liquid film on the lateral guide is effected in such a manner that its surface velocity is equal to the falling velocity of the curtain at any point along the lateral guide. The device implementing the method features a porous plate which is arranged between the liquid supply and the curtain side. This ensures a constant coating without any disturbances due to marginal influences.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.