Coating apparatus having an internal leveling blade
US4369731A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 2, 1981 |
| Grant date | Jan 25, 1983 |
| Priority date | — |
| Expiry date | Sep 2, 2001 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H5/0065
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An applicator for applying a film of coating material on a web of moving paper carried through an application zone and having a coater blade for doctoring the material on the web as it exits the zone, includes an internal leveling blade within the application zone. The leveling blade divides the application zone into leading and lagging coating material application chambers, and levels the material applied on the web in the leading chamber as the web moves into the lagging chamber. The leveling blade produces a pressure and shear point of coating material to paper so as to cause coating penetration and filling of voids and valleys in the paper, and the coater blade then levels and meters the film of fresh coating applied on the web in the lagging chamber to complete the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.