Patent · US Expired

Cleaning apparatus for a web of plastics film having a magnetic coating

US4213222A · kind A · utility

9Cited by

3References

3Claims

0Family size

Assignee

BASF SE

Inventors

Klaus Schoettle · Heidelberg, DE
Peter Dobler · Bischofswerda, DE
Helmut Lewin · Frankenthal (Pfalz), DE
Eberhard Koester · Bischofswerda, DE

Key dates

Filing date	Dec 28, 1978
Grant date	Jul 22, 1980
Priority date	—
Expiry date	Dec 28, 1998

Classification

Technology area (CPC G)Physics
CPC primaryG11B23/502
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An apparatus for continuously cleaning the surface of a web of plastics film provided with a magnetic coating, especially the surface of a magnetic tape, the surface to be cleaned being continuously kept in close contact with a tape of nonwoven fabric by virtue of the configuration of the path of travel of the web, wherein the poles of a magnet, which define an air gap, are located in the region of the contact area, behind the tape of nonwoven fabric, on the side facing away from the web.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.