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Browse Prior Art Database

Controlled Spacing of Stacked Flexible Magnetic Discs

IP.com Disclosure Number: IPCOM000082665D
Original Publication Date: 1975-Jan-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Kendall, FT: AUTHOR

Abstract

This disc pack represents a variation of the spacing technique disclosed in the IBM Technical Disclosure Bulletin, Vol. 17, No. 8, January 1975 pages 2367 and 2368, wherein flexible storage discs A are spaced to permit circulation of air between successive disc laminations. The individual discs (e.g., oxide coated MYLAR*, 0.0017'' thick per sheet, 12'' diameter) have attached (e.g., cemented) spacing strips B (e.g., strips 0.7'' in length, 0.2'' wide, 0.003'' thick). The spaced discs A are stacked on a spindle C which has an inlet F for pressurized air and slots D extending parallel to the axis of rotation. The spacing strips B are aligned in parallel throughout the stack.

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Controlled Spacing of Stacked Flexible Magnetic Discs

This disc pack represents a variation of the spacing technique disclosed in the IBM Technical Disclosure Bulletin, Vol. 17, No. 8, January 1975 pages 2367 and 2368, wherein flexible storage discs A are spaced to permit circulation of air between successive disc laminations. The individual discs (e.g., oxide coated MYLAR*, 0.0017'' thick per sheet, 12'' diameter) have attached (e.g., cemented) spacing strips B (e.g., strips 0.7'' in length, 0.2'' wide, 0.003'' thick). The spaced discs A are stacked on a spindle C which has an inlet F for pressurized air and slots D extending parallel to the axis of rotation. The spacing strips B are aligned in parallel throughout the stack.

During rotation, the pressurized air admitted through inlet F flows out through slots D into the spaces between the spacing strips B. The air flow causes the discs A to rotate in a desired disc-to-disc spacing. The air flow also serves to stabilize the rotation of the discs, to provide more efficient spacing of discs for access, i.e., to permit counting and separation by not shown counting and separation mechanisms, and to quickly stabilize the motion of the discs A upon removal of the separation mechanism. * Trademark of E.I. du Pont de Nemours & Co.

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