Plural-disk rotatable disk memory with air circulation system

Details Plural-disk rotatable disk memory with air circulation system Plural-disk rotatable disk memory with air circulation system

1986-09-15

1987-07-14

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

G11B 5012

Patent

active

046806563

ABSTRACT:
An information disk store possesses an air circulation system in a substantially sealed housing, by means of which system, which includes a channel for directing air to the end of the hub on which the disks are mounted, and a low-pressure compartment that is shut off from the disk compartment by a main filter, a first positive pressure gradient from the bottom to the top of the housing is set up in the peripheral space adjacent to the disks. It is advantageous to also set up a second positive pressure gradient in the direction of rotation of the disks, in the peripheral space adjacent to the disks. The novel air circulation system can be used with advantage in all information disk storage systems in which the write and read operations may be adversely affected by dust and dirt.

REFERENCES:
patent: 4130845 (1978-12-01), Kulma
patent: 4282554 (1981-08-01), Ho et al.
patent: 4370687 (1983-01-01), Shiraishi et al.
patent: 4412261 (1983-10-01), Tateyama et al.
patent: 4418369 (1983-11-01), Applequist et al.
patent: 4471395 (1984-09-01), Beck et al.
Reizo Kaneko et al., "Development of 800 Mega Byte Disk Drive", Review of the Electrical Communication Laboratories, vol. 28, Nos. 5-6, May-Jun. 1980, pp. 368-380.

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