Browse Prior Art Database

Encased Flexible Magnetic Disk with Wiper

IP.com Disclosure Number: IPCOM000088295D
Original Publication Date: 1977-May-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Bothun, ME: AUTHOR

Abstract

A flexible magnetic disk 10 (Fig. 1) is encased and is rotatably disposed in cartridge 12 and has magnetic read/write head 14 cooperating with its lower surface. (Viper 16 of fibrous material is fixed within cartridge 12 and contacts the lower surface of disk 10 for maintaining this surface clean so as to promote reliable magnetic reading and writing action by head 14.

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Encased Flexible Magnetic Disk with Wiper

A flexible magnetic disk 10 (Fig. 1) is encased and is rotatably disposed in cartridge 12 and has magnetic read/write head 14 cooperating with its lower surface. (Viper 16 of fibrous material is fixed within cartridge 12 and contacts the lower surface of disk 10 for maintaining this surface clean so as to promote reliable magnetic reading and writing action by head 14.

Cartridge 12 is formed by an upper part 18 (Fig. 2) and a lower part 20 forming cavity 22 therebetween in which flexible disk 10 is rotatably disposed. Disk 10 is fixed with respect to hub 24 which in turn is fixed on rotatable drive shaft 26 for drivingly rotating disk 10 within cartridge 12. Slot 28 is provided in the lower part 20 of cartridge 12 and extends radially with respect to drive shaft 26 so as to allow head 14 to traverse across the lower surface of disk 10 to operate on a plurality of concentric magnetic tracks on disk 10 as disk 10 rotates. Wiper 16 is fixed on the upper surface 20a of cartridge part 20 and is in the form of a sector disposed opposite slot 28, having hub 24 between it and head 14 extending through slot 28. Disk 10 is of very thin flexible MYLAR* film, and upper surface 20a of cartridge part 20 functions as a Bernoulli plate with respect to disk 10 as it rotates, with disk 10 flying slightly off surface 20a.

The lower surface of disk 10 is made as smooth as possible; nevertheless, it does have minute ridges on it, and these tend to be worn away by head 14 during start up and...