公开(公告)号：CA1280822C

公开(公告)日：1991-02-26

申请号：CA534862

申请日：1987-04-15

Applicant: IBM

Inventor： HATCHETT MICHAEL R ,  HEATH JOHN S

IPC: G11B23/02 ,  G11B23/03 ,  G11B33/14

Abstract: A disk file of the kind employing a vented hub assembly and slotted spacers between disks to provide a passage for circulatory airflow and employs a filter assembly extending circumferentially around the axial region of the hub assembly. The primary path for airflow is from a high pressure region at the periphery of the disks, through the filter assembly into the vented hub assembly and out again via the slotted spacers. A parallel leakage path between the filter itself and the hub assembly is limited by making the separation between a substantially planar surface of the filter assembly and the adjacent disk uniform and very small. Airflow rates through the filter are consequently enhanced. UK9-86-009

公开(公告)号：CS227655B2

公开(公告)日：1984-05-14

申请号：CS842377

申请日：1977-12-15

Applicant: IBM

Inventor： COX ALLEN R ,  HATCHETT MICHAEL R ,  RIGBEY LEONARD J

IPC: G11B25/04 ,  G11B17/32 ,  G11B23/00

公开(公告)号：CA1114499A

公开(公告)日：1981-12-15

申请号：CA290069

申请日：1977-11-02

Applicant: IBM

Inventor： COX ALLEN R ,  HATCHETT MICHAEL R ,  RIGBEY LEONARD J

IPC: G11B25/04 ,  G11B17/32

Abstract: CONTROLLED SURFACE FINISH FOR FLEXIBLE DISK STABILIZING PLATE A stabilizing backing plate for a rotating flexible record disk has a bearing surface with a smooth finish to prevent disk wear but provided with a plurality of depressions which trap air and prevent the flexible disk from adhering to the backing plate during start-up.

公开(公告)号：CA1084161A

公开(公告)日：1980-08-19

申请号：CA285281

申请日：1977-08-23

Applicant: IBM

Inventor： HATCHETT MICHAEL R ,  RIGBEY LEONARD J

IPC: G11B23/033 ,  G11B17/32 ,  G11B25/04 ,  G11B17/08 ,  G11B3/60

Abstract: The flexible disk of a flexible disk file is provided with a stationary backing plate over which the disk rotates supported on an air bearing between it and the plate. The plate has a longitudinal slot extending in a radial direction with respect to the disk to permit access by a record/playback head to the disk surface facing the plate. The backing plate is shaped in such a way that the rotating disk is continuously bent upwards about two chords on each side of a line through the head slot. The provision of these bends imparts stiffness to the disk in the vicinity of the head slot and stabilizes the flying characteristics of the disk.