Process and apparatus for the surface treatment of flexible magnetic recording media
AssigneeBASF SE
InventorsKlaus Schoettle, Wulf Muenzner, Hilmar Lechner, Dieter Woeppel, Lothar Gliniorz
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Abstract
A process and apparatus for the treatment of the recording surface of magnetic recording media using consecutively arranged units for burnishing, cleaning and calendering the web of plastics film provided with a magnetic coating. The process and apparatus of the invention are particularly suitable for the manufacture of magnetic tapes for the recording and playback of video signals.
Claims6
In the manufacture of magnetic media in the form of a web of base material coated with the recording layer, a process for the surface treatment of the coated web, comprising in this order, the steps of:
- burnishing the magnetic coating;
- freeing the magnetic coating from abrasive dust;
- and
- passing the coated web through a calender having at least one nip.
Dependencies are inferred from the claim text.