Process for thermoremanent duplication of magnetic recording mas

Details Process for thermoremanent duplication of magnetic recording mas Process for thermoremanent duplication of magnetic recording mas

1974-11-21

1976-03-30

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record copying

Contact transfer

G11B 586

Patent

active

039478726

ABSTRACT:
A process for thermoremanent duplication of a magnetic recording tape, which comprises recording magnetic signals by thermoremanent duplication on a slave tape consisting of a polyester film base and a layer of a ferromagnetic material coated thereon, and then heat-treating said magnetic recording slave tape without stretch at a temperature of at least 40.degree.C. but less than the Curie point of said ferromagnetic material. Dimensional changes of the slave tape after thermal duplication are thereby reduced.

REFERENCES:
dickens et al., "Thermoremanent Duplication of Magnetic Tape Recordings," Journal of SMPTE, Vol. 80, No. 3, Mar. 1971, pp. 177-178.

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