Ted Bildplatten Aktiengesellschaft, Aeg-telefunken, Teldec

Karl-Ekkehard Schriefl

Gunter Joschko

In order to effect repeated reworking of a body, whose tip, during use, engages a record carrier track to guide a playback or recording member along the track, the reworking involving subjecting the body to successive reworking operations after successive periods of use, the tip of the body being worn down to a certain extent during each period of use and material being removed from the tip to restore its original shape during each reworking operation, the useful life of the body is effectively increased by adjusting the maximum removal depth occurring during each successive reworking operation as a function of the depth to which the tip is worn during the corresponding preceding period of use.

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Berlin, Germany

Karl-Ekkehard Schriefl