U.S. Philips Corporation

Eduard J Tercic

Manfred Rosenthal

Heinrich Durr

Nicolaas Alphonsus Verhoeckx

Horst Kringe

Miloslav Janak

Martin Ginsberg

Helmut Schonwald

An office machine, for example, a printer, with a printing unit, individual paper transport via driving rollers and endless paper transport via a tractor is to be designed in such a way that as many operating modes as possible can be obtained by simple means. This is achieved at least one releasable cassette for individual paper is in the entry region of a printing unit. A tractor is pivotalby adjustable into a pushing and a pulling position and is located behind the printing unit. The following operating modes are selectable by adjustment of the tractor positions coupled to further components:

Office machine

Method and apparatus for dividing a track on a magnetizable information storage disc into sectors by writing sector identification information into the track. In order to optimize the storage capacity of a track on a magnetizable information storage disc the track is first filled with information bytes in response to the occurrence of the leading edge of an index pulse (a) derived from the disc in such manner that a predetermined number of bytes fill a portion (ix) of the track, followed alternately by sector identification bytes and further bytes defining the data field of the relevant sector in portions SK and DT respectively until the final group of sector identification bytes has been written into portion SKn, followed by further bytes into portion z until the leading edge of the next index pulse occurs. The (positive or negative) difference between the total number of bytes in the portions z+ix and the number of bytes in each of the data field portions (DT) is then determined and the write operation is then repeated in the same track with the number of bytes written in the data field portions modified in accordance with the difference determined, so that the difference is distributed uniformly over the various data field portions. The write operations are controlled by apparatus comprising counters which address a read-only memory containing the information bytes, an arithmetic unit for determining the difference, and a store storing the modified number of bytes to be written to define each data field.

Method and apparatus for dividing a track on a magnetizable information

A data recording device having a coding device which is supplied with a sequence of information bits to be recorded. The coding device forms coded information words of at least two different lengths from the sequence of information bits. The recording device further includes a divide-by-two member connected to the output of the coding device, a scrambler connected to the output of the divide-by-two member for scrambling the output signals of the divide-by-two member; and a write head connected to the output of the scrambler for recording the scrambled output signals.

Device for transferring digital information

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Huttental-Weidenau, Germany

Eduard J Tercic