Method and apparatus for transferring magnetic signal from a mas

Details Method and apparatus for transferring magnetic signal from a mas Method and apparatus for transferring magnetic signal from a mas

1976-11-26

1977-09-06

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record copying

Contact transfer

G11B 586

Patent

active

040472302

ABSTRACT:
A master sheet is coated with a magnetic layer carrying magnetic signals in, for example, a spiral magnetic recording track, and is pressed into contact with a copy sheet which is also coated with a magnetic layer. A magnetic field is applied to the sheets to transfer the magnetic signals from the master sheet to the copy sheet. The copy sheet is then separated from the master sheet by air pressure, suction or mechanical means in a direction perpendicular to the sheets and subsequently fed away from the master sheet in a direction parallel to the sheets while maintained separated from the master sheet to reduce the transfer noise level to a negligible amount.

REFERENCES:
patent: 3665513 (1972-05-01), Benson et al.
patent: 3721775 (1973-03-01), Fujimoto et al.
patent: 3843964 (1974-10-01), Fujimoto

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