Mannesmann Aktiengesellschaft

Ke-ma-tec Gmbh Ketterer-maschinen-technologie

Gunter Ketterer

Christian Fehrenbach

Horst Dyma

Wolfgang Schlassus

Gunter Nolke

A device for the data processing with magnetic information carriers (2) includes a read-write head (4), where a relative motion occurs between the information carrier and the read-write head (4) during processing by driving a slide (5) with a motor (6). In order to avoid distortion generated by mechanical errors of the device during reading of the data, it is disclosed that the drive connection between the slide (5) and the motor (6) is free from play in axial direction and that the read-write head (4) is springingly adjustable with a holder (14), free from play in axial direction and perpendicular to the surface (2a) of the information carrier.

Read-write device for data processing with magnetic information carriers

A device with a read head (16) for magnetically recorded information in electronic data processing plants, in particular in document processing systems, is subject to disturbances by the document operation systems, where modular device units cause magnetic interference fields in the area of the read head (16). In view of the unavoidability of such magnetic interference fields and in order to dispense substantially with a respective shielding for a magnetic read head and in order to generate nevertheless a sufficiently accurate read signal (20), it is disclosed that a read head (16) and a reference head (17) are combined to a read system (33), where the read head and the reference head are respectively associated with the same mechanical and electrical values. The difference signal of the read head (16) and the reference head (17) is composed of the interference signal (19) and a combination of an interference signal and the read signal (20) at the output (21) of the difference circuit (18) and can be fed to a read electronic (23).

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Unterkirnach, Germany

Gunter Ketterer