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Browse Prior Art Database

Transducer Head for Multiple Flexible Disk Pack

IP.com Disclosure Number: IPCOM000088922D
Original Publication Date: 1977-Aug-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Weidenhammer, JA: AUTHOR

Abstract

In a multiple flexible disk stack of the type shown in U. S. Patent 3,936,880 it is desirable to establish a nonfrictional air bearing between the recording head and the disk surface at very close spacing on the order of 10 microinches.

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Transducer Head for Multiple Flexible Disk Pack

In a multiple flexible disk stack of the type shown in U. S. Patent 3,936,880 it is desirable to establish a nonfrictional air bearing between the recording head and the disk surface at very close spacing on the order of 10 microinches.

A stabilizing platform structure providing for stable formation of such air bearing is shown in the preceding article. In that configuration the platform is a toroidal ring structure surrounding the transducing head completely, the head projecting typically .002 to .003 inches above the tangent to the ring radius (Figs. 1 and 2).

When such a ring structure is converted into the "horseshoe" form (Fig. 3) by removal of shaded areas D, E and F, a head located in the same general relative position, as in Fig. 1, forms an even more uniform bearing. The slight bubbling effect (Fig. 5) associated with the closed ring structure of Fig. 1 is eliminated (Fig. 6) by the open structure. The open structure (Figs. 4 and 6) should sufficiently envelop the head, in relation to the direction of disk motion, to provide a stable aerodynamic reference, but have sufficient areas removed and radius offset in the trailing portion to minimize formation of bulges or bubbles of the kind suggested in Fig. 5. The optional opening geometry may be determined empirically.

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