Basf Aktiengesellschaft

Manfred Gehrung

Klaus Schoettle

Peter Rudolf

Joachim Hack

Heinrich Wittkamp

Herbert Henkler

Helmut Kreissler

Eduard Rasek

Friedrich Anslinger

A method and apparatus for burnishing the surface of magnetic recording media, wherein there is relative movement between the surface to be burnished and the abrasive member, and the abrasive member is urged against the said surface, the pressure applied being increased over a period of time or at a plurality of locations, and then being reduced again.

Method for the surface treatment of magnetic recording media

This invention concerns a tape transport apparatus based on the contact-winding principle and, in particular, an apparatus for generating/keeping constant the tape tension during all operational phases of the tape transport, and for the quick, trouble-free braking of each tape pack, independently of the amount of tape wound thereon. By means of magnetic braking devices allocated to each tape pack and to the capstan whose braking action depends upon the momentary diameter of the tape packs, the object of the invention is achieved technically and economically with the greatest possible success. The apparatus is applicable in all cases where tape-like material is to be uniformly wound and transported without undue stress, and in particular for magnetic tape transport systems.

Tape transport apparatus

A cassette, particularly a cassette for a wide recording tape, consisting essentially of a lid-closable housing of plastics material, snap latch means being provided which interact between the long side of the lid and the wall of the housing opposite the lid hinge, which means consist, according to the invention, of cams on the lid and grooves in the wall of the housing, which cams and grooves engage each other to produce, when the cassette is opened, an initial closing force by deformation of the adjacent wall of the housing, in order to make opening of the cassette more difficult.

Cassette, particularly a cassette for a reel of wide recording tape

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Ludwigshafen, Germany

Manfred Gehrung