Apparatus for changing the helix angle of magnetic tape relative

Details Apparatus for changing the helix angle of magnetic tape relative Apparatus for changing the helix angle of magnetic tape relative

1988-11-21

1991-03-26

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Head accessory

360 85, 242182, G11B 1560

Patent

active

050034243

ABSTRACT:
A helical scan magnetic tape record/reproduce apparatus includes apparatus for changing the helix angle of magnetic tape relative to a rotary head scanner. A pair of elongate, arcuate air-bearing guides are disposed immediately adjacent and tangential to opposite sides of a circumferential surface of the rotary head scanner. The guides are at a first elevation and first angle and a second elevation and second angle, respectively, to cooperatively guide magnetic tape along a path at a predetermined helix angle while the magnetic tape is partially wrapped around the rotary head scanner. The planes of the air-bearing guides are changed in equal but opposite directions to change the helix angle of the tape relative to the rotary head scanner.

REFERENCES:
patent: 3418424 (1968-12-01), Takayanagi
patent: 3592976 (1971-07-01), McGinnis
patent: 3697676 (1972-10-01), Protas
patent: 3943566 (1976-03-01), Brock et al.
patent: 4050090 (1977-09-01), Kollar
patent: 4357641 (1982-11-01), Dischert
patent: 4703370 (1987-10-01), Inoue et al.
patent: 4709280 (1987-11-01), Delacou
patent: 4763210 (1988-08-01), Grant
patent: 4772969 (1988-09-01), Grant
IBM Technical Disclosure Bulletin, vol. 18, No. 7, Dec. 1975, Self-Guiding Bearing, Hammond et al.
IBM Technical Disclosure Bulletin, vol. 18, No. 12, pp. 3931-3934, dated May 1976, Guzman.

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