Apparatus and method for anhysteretically recording from master

Dynamic magnetic information storage or retrieval – Record copying – Contact transfer

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G11B 586

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active

055814174

ABSTRACT:
A ported vacuum drum (20, 56-98) is provided on its exterior cylindrical surface (22) with a master layer (24) of magnetic recording medium in position to contact a slave layer (14) of magnetic recording medium provided on one side and along at least one edge of a web (10); so that, vacuum applied (74-82) between the cylindrical surface and the web at locations (88-94) spaced from the zone of contact (98) between the recording media will hold the slave layer on the web securely in contact with the master layer on the drum as the drum rotates, thereby permitting anhysteretic recording from the master layer to the slave layer. A method of anhysteretically recording is taught.

REFERENCES:
patent: 2974307 (1961-03-01), Wiener
patent: 3609724 (1971-09-01), Allison
patent: 3630424 (1970-06-01), Rau
patent: 3703612 (1972-11-01), Higashida et al.
patent: 3782947 (1974-01-01), Krall
patent: 3825948 (1974-07-01), Hendershot, III et al.
patent: 4110797 (1978-08-01), Hoshino et al.
patent: 4193099 (1980-03-01), Hayashi
patent: 4194661 (1980-03-01), Grant
patent: 4277806 (1981-07-01), Jeffers et al.
patent: 4302523 (1981-11-01), Audran
patent: 4341363 (1982-07-01), Inatome
patent: 4542062 (1985-09-01), Takada et al.
patent: 4631202 (1986-12-01), Opfer
patent: 4654276 (1987-03-01), Ahlert
patent: 4889269 (1989-12-01), Long et al.
patent: 4998658 (1991-03-01), DiStefano
patent: 5155535 (1992-10-01), Bermel et al.
patent: 5230818 (1993-07-01), James et al.
IBM Technical Disclosure Bulletin, vol. 10, No. 11, Apr. 1968, pp. 1710-1711, "Sink to Control Noise in an Externally Pressurized Air Bearing".

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