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Browse Prior Art Database

Flexible Magnetic Disk Stabilizer

IP.com Disclosure Number: IPCOM000089584D
Original Publication Date: 1977-Nov-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Beck, JL: AUTHOR [+3]

Abstract

The lower fan plate 5, having the blades 6 on its upper surface, together with the rigid porous base plate 1, disposed above plate 5, minimize the axial runout of flexible disk 4, disposed above plate 1, to provide a very stable magnetic recording surface comparable to that of a hard disk file.

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Flexible Magnetic Disk Stabilizer

The lower fan plate 5, having the blades 6 on its upper surface, together with the rigid porous base plate 1, disposed above plate 5, minimize the axial runout of flexible disk 4, disposed above plate 1, to provide a very stable magnetic recording surface comparable to that of a hard disk file.

Rigid base plate 1 has a top surface that is flat, smooth and vented with tiny pores 3. Pores 3 are the result of making base plate 1 from a porous material, such as porous glass or ceramic, or from a porous metal, such as bronze. The particular material selected is dependent upon the subsequent working of the plate 1 on its top surface 2 that is desired. Glass beads are very stable and, if used in making plate 1, allow the top surface 2 of plate 1 to be left ground or polished flat and smooth. Lapping the porous structure creates a surface 2 that consists of partially cutoff glass spheres, and the part of surface 2 formed by the spheres is smooth while the rest of the surface 2 has voids. These voids are the pores 3 that become air channels used to hold disk 4 down on top surface 2. Below rigid base plate 1 is firmly attached lower fan plate 5 that has blades 6 designed and spaced to move air through the assembly. Magnetic head 7 rests on flexible disk 4, and has contact therewith for the transferral of data between disk 4 and head 7.

In operation, base plate 1 and fan plate 5 are rotated as an assembly, and flexible disk 4 is attached to the assembly at the center. Air is thus moved outwardly through the assembly in a man...