Browse Prior Art Database

Slotted Disk

IP.com Disclosure Number: IPCOM000037555D
Original Publication Date: 1989-Mar-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Schopp, RE: AUTHOR

Abstract

The rigid, magnetic data disk 10 shown in the figure has radial slots 11 extending from the inner diameter 12. The hub, spacers and clamping elements that retain the disk or stack of disks on a spindle extend between the inner diameter 12 and the circular broken line 14.

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Slotted Disk

The rigid, magnetic data disk 10 shown in the figure has radial slots 11 extending from the inner diameter 12. The hub, spacers and clamping elements that retain the disk or stack of disks on a spindle extend between the inner diameter 12 and the circular broken line 14.

The current state of the art disk-spindle assemblies use axial clamping devices to positively retain the disk during drive operation and handling or shipping of the disk drive. These axial clamping forces generate strains in the disk and cause an upsetting or flow of disk material adjacent the clamping area. The disk accommodates this condition by distorting to a position that is less flat than in the unclamped position. The out of flat condition can take almost any shape including wavy, oil can and curled and may result in combinations of such non-planar configurations.

The slotted disk of the figure exhibits minimal distortion when clamped to the spindle as material is displaced by the clamping forces. Such material can yield into the volume of the slots. The reduced surface distortion permits the use of thinner disks that have less ability to resist distortion forces.

(Image Omitted)

Disclosed anonymously.

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