Dynamic magnetic information storage or retrieval – Record medium – Drum
Patent
1982-12-30
1986-12-30
Wolff, John H.
Dynamic magnetic information storage or retrieval
Record medium
Drum
360137, G11B 576
Patent
active
046333576
ABSTRACT:
A recording medium operative with a recording and/or reproducing apparatus comprising a rotational motor and recording and/or reproducing transducer. The recording medium comprises a main body including a flexible recording carrier in the form of a sheet or film, and a support member supporting one end of the main body to maintain a circular shape for the body and being engageable with the motor. The recording carrier has a hollow cylindrical-shape and is provided with an opening at the end remote from the support member. The carrier has a recording surface around its periphery and a hollow interior with a surface which is parallel to the outer peripheral surface. The recording medium is rotated by the motor while maintaining a predetermined minute gap between the main body and a rotation stabilizing member which has a cylindrical surface substantially parallel to the main body.
REFERENCES:
patent: 3001850 (1961-09-01), Marrs
patent: 3029416 (1962-04-01), Quade
patent: 3390385 (1968-06-01), Ehalt
patent: 3478339 (1969-11-01), Lichowsky
IBM Technical Disclosure Bulletin, vol. 13, No. 11, Apr. 1971.
IBM Technical Disclosure Bulletin, vol. 19, No. 8, Jan. 1977.
Sniezek Andrew L.
Victor Company of Japan Ltd.
Wolff John H.
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