Edge dam for paper coating apparatus and method
US4426412A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1982 |
| Grant date | Jan 17, 1984 |
| Priority date | — |
| Expiry date | Sep 13, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05C11/04
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An edge dam for an applicator for applying a film of coating liquid to a moving web of paper carried through an application zone, is characterized by a seal element at each side end of the zone for substantially sealing the side end of the zone, thereby to impede a flow of coating material out of the zone. At least one orifice is formed through the seal element outwardly of the zone, and the orifice is connected with a supply of water under pressure for directing a flow of water against the peripheral edge of the web moving therepast, thereby to wet the edge and flush the same of any coating material seeping past the element. In consequence, edge stickers and coating liquid pickup on the web edge are substantially eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.