Dynamic magnetic information storage or retrieval – Record medium
Patent
1976-02-24
1977-02-22
Eddleman, Alfred H.
Dynamic magnetic information storage or retrieval
Record medium
360 2, 360101, G11B 574, G11B 2500, G11B 1900
Patent
active
040094928
ABSTRACT:
An apparatus for recording and/or reproducing video signal information employs, as a record medium, a sheet assembly composed of at least two normally closely adjacent, confronting flexibly resilient sheets which provide mutual protection, when in that relation, for video signal information recorded, for example, magnetically, on at least one of the sheets. The recording and/or reproducing apparatus has a separator device which slidably receives the sheet assembly and separates or spreads apart substantial portions of the sheets, and the separated portion of each sheet which is adapted to have signal information recorded thereon is directed by respective sheet guides from the separator device in an arcuate path about a respective guide drum which has associated rotary transducers, for example, magnetic heads, so that, when the sheet assembly and the guide drum and transducers are moved relative to each other in the direction of the drum axis, for example, by displacement of the separator device and sheet guides, as a unit, relative to the guide drum, the rotary transducers scan successive parallel record tracks on the portion of sheet about the drum. Preferably, in recording video signal information on one of the sheets, the rate of movement of the sheet assembly relative to the respective drum and rotary transducers is selected so that there are no guard bands or gaps between the successive parallel tracks for enhancing the utilization of the sheet for recording purposes.
When audio signal information is also to be recorded on, and reproduced from another of the sheets of the sheet assembly, the separated portion of such other sheet is also directed from the separator device about another guide drum having rotary transducers associated therewith, and the latter transducers are preferably rotated at a slower speed than the transducers for recording and/or reproducing the video signal information so that the transducers for recording and/or reproducing the audio signal information will scan spaced apart, parallel record tracks on the respective sheet portion.
REFERENCES:
patent: 2915596 (1959-12-01), Lyon et al.
patent: 3406382 (1968-10-01), Wilmer
patent: 3454940 (1969-08-01), Ford et al.
patent: 3727031 (1973-04-01), Marmer et al.
Kihara Nobutoshi
Shimada Osamu
Eddleman Alfred H.
Eslinger Lewis H.
Sinderbrand Alvin
Sony Corporation
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