Browse Prior Art Database

Baffle Construction for Bistable Disk Pack

IP.com Disclosure Number: IPCOM000086096D
Original Publication Date: 1976-Jul-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Orlando, AW: AUTHOR

Abstract

Packs of as many as 500 continually rotating flexible disks, which are restrained (clamped) in a central area but displaceable between the periphery and the area of restraint by flexure, are accessed by flexing the disks apart at a selected position in the pack and inserting a head into the opening formed thereby.

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Baffle Construction for Bistable Disk Pack

Packs of as many as 500 continually rotating flexible disks, which are restrained (clamped) in a central area but displaceable between the periphery and the area of restraint by flexure, are accessed by flexing the disks apart at a selected position in the pack and inserting a head into the opening formed thereby.

Such packs may be operated in a bistable mode, in which air is circulated through and between the disks at a specifically controlled pressure while the disks are undisplaced. This conditions the pack to be displaced to a stable accessible configuration by a transient force applied at the desired position, thereby eliminating the need for maintaining the opening by continously applied energy.

In this mode, the widths of openings produced at different positions in the pack tend to vary considerably. This is undesirable because it may obstruct or prevent head insertion at positions of narrow width opening, and also because it imposes severe positioning requirements on the apparatus used to position the head relative to the disks.

However, a baffling construction such as that shown in the accompanying illustration can be used to significantly decrease the nonuniformity. Angle bracket 1 has a projecting edge 2 located in close proximity to the outer diameter of the rotating pack 3. This acts as a shelf, disrupting the normal flow of air around the pack and tends to equalize the peripheral air pressure distribution f...