Basf Aktiengesellschaft

Rudolf Angermann

Joachim Hack

Klaus Schulze-Berge

Roland Brotzler

A drive apparatus for a recording disk, particularly a flexible magnetic disk in an envelope, comprising a rotatable clamping member which can be caused to engage one another, after the recording disk has been introduced therebetween, to clamp the disk for rotation thereof, in position between clamping surfaces of the two members. The clamping member is of axially expandable design and a resilient element is interposed between the face of the clamping member and the bottom of the recessed member so that the clamping member, prior to completion of its stroke and prior to its radial expansion, is engaged by the spring element. In this manner the spring element centers the position of the clamping member with respect to the recessed member and thereby insures clamping of the disk in its centered position.

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Offenburg, Germany

Rudolf Angermann