Dynamic magnetic information storage or retrieval – Record copying
Patent
1984-01-27
1986-05-06
Cardillo, Raymond F.
Dynamic magnetic information storage or retrieval
Record copying
360 16, 360 741, 242181, 369 84, G11B 586, G11B 1532
Patent
active
045875758
ABSTRACT:
The present invention involves a method and apparatus to prolong the useful life of a drive tape used in a magnetic contact printer to advance master and copy tapes past a transcribing head to transcribe the signals from the master tape onto the copy tape. The present invention provides a method for using the entire length of the drive tape even though individual segments on different master tapes may be shorter than the length of the drive tape. In the method of the present invention the drive tape is rewound after each transcription only part of the way to the beginning of that transcription. The next transcription will then require the use of a part of the drive tape not used in the previous transcription. The apparatus of the present invention uses a digital logic circuit to carry out that method. The apparatus comprises a counter that senses the length of advance of the drive tape for each transcription and detectors that provide signals to terminate the rewindings of the drive tape at the proper points.
REFERENCES:
patent: 3812532 (1974-05-01), Crosser et al.
patent: 4185306 (1980-01-01), Dudley
Odagiri Yoichi
Sato Tsuguo
Bowler Alyssa H.
Cardillo Raymond F.
Eslinger Lewis H.
Sinderbrand Alvin
Sony Corporation
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