Extrusion coater for the production of a magnetic recording medium
US5641355A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1995 |
| Grant date | Jun 24, 1997 |
| Priority date | — |
| Expiry date | Dec 4, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05C9/06
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An extrusion coater for the production of a magnetic recording medium having at least one coater slot is described, the lower lip arranged in a direction opposite to the running direction of the substrate and displaced forward relative to the upper lip containing, in its interior, a permanent magnet which is oriented approximately parallel to the upper edge of the lower lip and whose field lines are roughly perpendicular to the coating direction of the magnetic dispersion flowing through the coater slot. By means of this arrangement, it is possible substantially to reduce the layer thickness while achieving a satisfactory coating and also considerably to reduce the edge bead.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.