Dynamic magnetic information storage or retrieval – Head – Head surface structure
Patent
1996-12-23
1999-11-02
Tupper, Robert S.
Dynamic magnetic information storage or retrieval
Head
Head surface structure
360107, G11B 5187, G11B 553
Patent
active
059781858
ABSTRACT:
Disclosed in an arrangement to achieve satisfactory head contact by increasing contact face pressure at a head gap and to reduce the change in time of head contact performance in a double azimuth head. Heads in a portion in which a tape is slid are respectively constructed with each head having two different arcs with a radius of curvature R1 in a first area which includes a gap, and with a radius of curvature R2 in a second area which is adjacent to the first area. A transition portion P for transitioning an arc with the radius of curvature R1 and an arc with the radius of curvature R2 is located in the direction of its adjacent head based upon a contact point Q on R1 of a common tangent drawn from an arc forming a periphery of a rotating drum to a circle formed by R1. The relationship between the radiuses of curvature in two areas is set to R1>R2. As the area in which a tape is in contact can be reduced, contact face pressure by the tape on a gap can be increased, satisfactory head contact can be obtained and as a contact area with a tape is wide to some extent, a change in time of contact performance can be reduced.
REFERENCES:
patent: 4318146 (1982-03-01), Ike et al.
patent: 4758916 (1988-07-01), Niwa et al.
patent: 5130875 (1992-07-01), Ono et al.
patent: 5233478 (1993-08-01), Kanota
patent: 5369531 (1994-11-01), Kubuto et al.
Abe Fukuyasu
Fujimori Shinya
Fujishiro Masahiko
Hirayama Kuniaki
Imachi Toshihiko
Hitachi , Ltd.
Tupper Robert S.
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