Short dwell coater apparatus
US5199991A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 1991 |
| Grant date | Apr 6, 1993 |
| Priority date | — |
| Expiry date | Apr 19, 2011 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/36
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A short dwell coater apparatus is disclosed for applying coating material onto a web guided by a backing roll. The apparatus includes a coater housing which is disposed in close proximity to the backing roll. The arrangement is such that the web guided by the backing roll moves between the backing roll and the housing. The housing defines an application chamber which is open towards the web and which extends along the web in a cross-machine direction. The application chamber is connected to a source of coating material such that the coating material is applied to the web during movement of the web past the chamber. The coater housing has an upstream lip which is disposed upstream relative to the chamber and adjacent to the web. The lip defines an upstream coating overflow for permitting excess coating material to flow therethrough. A flexible coater metering blade is disposed downstream relative to the chamber. The blade extends from the housing towards the web for metering the coating material applied to the web. A perforate conduit is disposed within the chamber and extends in a cross-machine direction. The conduit permits the flow therethrough of a vortex of entrained air genera…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.