Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Combined Disc and Spacer for Storage Device

IP.com Disclosure Number: IPCOM000052639D
Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Coles, RD: AUTHOR [+2]

Abstract

Some data storage devices include several discs mounted on a spindle. The surface of each disc is formed with a coating of magnetizable material. The coated surfaces of adjacent discs must be spaced apart so that heads for use in reading or writing data on the surfaces can be inserted between the discs. The discs are normally formed from flat plates and are spaced apart on the spindle by spacers. Therefore, in assembling discs onto a spindle the assembly process involves stacking discs and spacers alternately.

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 63% of the total text.

Page 1 of 2

Combined Disc and Spacer for Storage Device

Some data storage devices include several discs mounted on a spindle. The surface of each disc is formed with a coating of magnetizable material. The coated surfaces of adjacent discs must be spaced apart so that heads for use in reading or writing data on the surfaces can be inserted between the discs. The discs are normally formed from flat plates and are spaced apart on the spindle by spacers. Therefore, in assembling discs onto a spindle the assembly process involves stacking discs and spacers alternately.

The figure at A illustrates the arrangement used at present. The view is a side view in cross section through three discs 1, and four spacers 2 mounted alternately on a spindle 3.

The figure at B illustrates an alternative proposed arrangement in which the spacers are incorporated into the discs. Each disc 4 is formed at its radially inner part with an annular portion 5 of a thickness greater than that of the rest of the disc. When the discs are stacked on the spindle 3 as illustrated, the annular portions 5 cause the discs to be spaced apart, as required.

The figure at C illustrates another arrangement in which a disc 6 is formed at its radially inner part with two annular portions 7, 8 projecting respectively above the two surfaces of the disc to form a spacer. It will be appreciated that if discs of this construction are stacked on a spindle, the annular projecting portions will abut and space the discs apart....