Browse Prior Art Database

Self Ventilating Flexible Disk Stack with Stationary Bottom Plate

IP.com Disclosure Number: IPCOM000082337D
Original Publication Date: 1974-Nov-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

King, FK: AUTHOR

Abstract

A stack 1 of thin flexible magnetic disks 10 is disposed over stationary bottom plate 12, and a controlled spacing between plate 12 and stack 1 is attained principally by virtue of the provision of an air plenum 12a in plate 12.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 76% of the total text.

Page 1 of 2

Self Ventilating Flexible Disk Stack with Stationary Bottom Plate

A stack 1 of thin flexible magnetic disks 10 is disposed over stationary bottom plate 12, and a controlled spacing between plate 12 and stack 1 is attained principally by virtue of the provision of an air plenum 12a in plate 12.

The stack 1 of disks 10 is self-ventilating, due to the provision of ventilating openings 10a in each of disks 10. A spacer 14 is provided below each of disks 10 for spacing the disks apart. A drive shaft 16 extends through disks 10 and spacers 14, and also extends through an opening 12b in plate 12. A gap 18 is provided between the outer peripheral surface of shaft 16 and the sides of opening 12b.

To control the spacing between stationary plate 12 and the lowermost disk 10 of stack 1 adjacent to it for a self-ventilating disk pack, stationary plate 12 must be so designed that it provides: 1. Enough air flow for ventilating holes 10a so the flutter of disks 10 is controlled, and 2. Restriction of air flow for the gap 20 between plate 12 and the lowermost disk 10 adjacent to plate 12, so that the disk pack is not lifted away an excess distance from plate 12.

These objects are attained, since the diameter C of plenum 12a in plate 12 is a little larger than the diameter A, which is the distance B between the centers of holes 10a plus the diameter of a hole 10a, and since the diameter E of opening 12b is only a little larger than the diameter D of shaft 16.

When the disk pack i...