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Axial Motion Flexible Disk File using Applied Pressure and Vacuum

IP.com Disclosure Number: IPCOM000083240D
Original Publication Date: 1975-Apr-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 89K

Publishing Venue

IBM

Related People

McGinnis, BW: AUTHOR

Abstract

Fig. 1 shows a pack of flexible co-rotating storage disks 1 held slidably on (e.g., keyed to) spindle 2 and arranged in sequence between axially fixed co-rotating rigid end plates 3 and 4. The disks 1 are shown in a "home" position in which a gap exists between plate 4 and the nearest disk.

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Axial Motion Flexible Disk File using Applied Pressure and Vacuum

Fig. 1 shows a pack of flexible co-rotating storage disks 1 held slidably on (e.g., keyed to) spindle 2 and arranged in sequence between axially fixed co- rotating rigid end plates 3 and 4. The disks 1 are shown in a "home" position in which a gap exists between plate 4 and the nearest disk.

If an access initiating device 5 (Fig. 2), for instance an air nozzle, is operated to produce a partial opening 6 at interface 7 determined by a random-access selection process and if vacuum (v) or negative pressure is applied coordinately through openings 8 in plate 4, the disks 1 between interface 7 and plate 4 are shifted to the right as a cohesive unit (see Fig. 3). This produces a gap 9 at interface 7 which is wide enough to accommodate a transducer. When positive pressure (P) is applied through openings 10 in plate 4, the disks 1 are restored to the home position (Fig. 4).

Fig. 5 suggests a modular expansion of the above configuration with pressure and vacuum applied through the end plates, to two separately accessible packs of disks having a common rotating drive shaft 11 and a common home position reference plate 12.

Fig. 6 shows an and plate for vacuum and pressure applications which is shaped to shroud the adjacent disks, in order to exert more effective shifting action upon the disks.

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