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Browse Prior Art Database

Operating Multiple Flexible Disk Packs

IP.com Disclosure Number: IPCOM000085118D
Original Publication Date: 1976-Feb-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

McMurtry, DH: AUTHOR [+2]

Abstract

A multiple flexible disk of the internally pressurized type is opened at an inter-disk gap, to permit transducing head access by a combination of internal pneumatic and external mechanical means. In such a pack disks are mounted for rotation on a hub structure having an internal bore space.

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Operating Multiple Flexible Disk Packs

A multiple flexible disk of the internally pressurized type is opened at an inter-disk gap, to permit transducing head access by a combination of internal pneumatic and external mechanical means. In such a pack disks are mounted for rotation on a hub structure having an internal bore space.

The disks are spaced apart on the hub by porous spacers which enable fluid communication between the bore space and the inter-disk gaps. The bore space pressure is adjusted to the so-called bistable level, at which a disturbance applied to an inter-disk gap will cause the pack to split into two stable halves.

For fast opening, an air jet splitter movable within the bore space to a selected inter-disk gap initiates the split. Spontaneous propagation of the split is accelerated by simultaneous or fractionally delayed insertion of a splitter blade at the same disk interface at the pack periphery. The external knife may be left in position to stabilize the opening for subsequent transducing.

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