Browse Prior Art Database

Flexible Disk Structure

IP.com Disclosure Number: IPCOM000085857D
Original Publication Date: 1976-Jun-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Orlando, AW: AUTHOR

Abstract

The drawing shows a flexible disk construction for use in multidisk packs, in which access to the rotating disks is obtained by deflecting the path of rotation of the disks at a selected interface. As shown the disks, which are held centrally clamped in the area 1 indicated by shading, are displaceable by flexure outside of this area during rotation of the pack. The concentric cuts 2 between the clamped area and recording zone 3 serve the purpose of increasing the flexibility of the disks, and thereby serve to provide larger access openings and more uniform recording surface orbits.

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Flexible Disk Structure

The drawing shows a flexible disk construction for use in multidisk packs, in which access to the rotating disks is obtained by deflecting the path of rotation of the disks at a selected interface.

As shown the disks, which are held centrally clamped in the area 1 indicated by shading, are displaceable by flexure outside of this area during rotation of the pack. The concentric cuts 2 between the clamped area and recording zone 3 serve the purpose of increasing the flexibility of the disks, and thereby serve to provide larger access openings and more uniform recording surface orbits.

In a typical configuration, the disks are 0.0015 inch thick MYLAR* base magnetic disks 12 inches in diameter having cuts at 1 1/4 and 1 1/2 inch radial positions angularly offset, as illustrated. The disks (e.g., 500 disks) are stacked with spacers (1 1/4 inch diameter, 0.0017 inch thick) inserted between successive disks to permit centrifugal air flow between recording surfaces. * Trademark of E.I. du Pont de Nemours & Co.

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