Doctor blade for paper coater
US4780336A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 1987 |
| Grant date | Oct 25, 1988 |
| Priority date | — |
| Expiry date | Apr 6, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05C11/04
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An improved doctor blade, for use at a downstream end of a pressurized coating material application zone of a paper coater, has a tip portion of a limited length and first thickness and a major body portion of a second and increased thickness. The increased thickness of the major body portion enables the doctor blade to resist flexure caused by variations in pressure of the coating material in the zone, so that the blade tip more uniformly meters and levels coating on a paper web. Also contemplated is an arrangement for clamping the blade at the downstream end of the application zone, in a manner to minimize flexure of the blade in response to variations in pressure of the coating material in the zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.